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| <div class="subTitle">org.apache.hadoop.hbase.master.balancer</div> |
| <h2 title="Class StochasticLoadBalancer" class="title">Class StochasticLoadBalancer</h2> |
| </div> |
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| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
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| <li><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer</li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
| <ul class="blockList"> |
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| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd>org.apache.hadoop.conf.Configurable, <a href="../../../../../../org/apache/hadoop/hbase/conf/ConfigurationObserver.html" title="interface in org.apache.hadoop.hbase.conf">ConfigurationObserver</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a>, <a href="../../../../../../org/apache/hadoop/hbase/Stoppable.html" title="interface in org.apache.hadoop.hbase">Stoppable</a></dd> |
| </dl> |
| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/FavoredStochasticBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">FavoredStochasticBalancer</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>@InterfaceAudience.LimitedPrivate(value="Configuration") |
| public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.113">StochasticLoadBalancer</a> |
| extends <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></pre> |
| <div class="block"><p>This is a best effort load balancer. Given a Cost function F(C) => x It will |
| randomly try and mutate the cluster to Cprime. If F(Cprime) < F(C) then the |
| new cluster state becomes the plan. It includes costs functions to compute the cost of:</p> |
| <ul> |
| <li>Region Load</li> |
| <li>Table Load</li> |
| <li>Data Locality</li> |
| <li>Memstore Sizes</li> |
| <li>Storefile Sizes</li> |
| </ul> |
| |
| |
| <p>Every cost function returns a number between 0 and 1 inclusive; where 0 is the lowest cost |
| best solution, and 1 is the highest possible cost and the worst solution. The computed costs are |
| scaled by their respective multipliers:</p> |
| |
| <ul> |
| <li>hbase.master.balancer.stochastic.regionLoadCost</li> |
| <li>hbase.master.balancer.stochastic.moveCost</li> |
| <li>hbase.master.balancer.stochastic.tableLoadCost</li> |
| <li>hbase.master.balancer.stochastic.localityCost</li> |
| <li>hbase.master.balancer.stochastic.memstoreSizeCost</li> |
| <li>hbase.master.balancer.stochastic.storefileSizeCost</li> |
| </ul> |
| |
| <p>You can also add custom Cost function by setting the the following configuration value:</p> |
| <ul> |
| <li>hbase.master.balancer.stochastic.additionalCostFunctions</li> |
| </ul> |
| |
| <p>All custom Cost Functions needs to extends <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer"><code>StochasticLoadBalancer.CostFunction</code></a></p> |
| |
| <p>In addition to the above configurations, the balancer can be tuned by the following |
| configuration values:</p> |
| <ul> |
| <li>hbase.master.balancer.stochastic.maxMoveRegions which |
| controls what the max number of regions that can be moved in a single invocation of this |
| balancer.</li> |
| <li>hbase.master.balancer.stochastic.stepsPerRegion is the coefficient by which the number of |
| regions is multiplied to try and get the number of times the balancer will |
| mutate all servers.</li> |
| <li>hbase.master.balancer.stochastic.maxSteps which controls the maximum number of times that |
| the balancer will try and mutate all the servers. The balancer will use the minimum of this |
| value and the above computation.</li> |
| </ul> |
| |
| <p>This balancer is best used with hbase.master.loadbalance.bytable set to false |
| so that the balancer gets the full picture of all loads on the cluster.</p></div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="nested.class.summary"> |
| <!-- --> |
| </a> |
| <h3>Nested Class Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Nested Class Summary table, listing nested classes, and an explanation"> |
| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFromRegionLoadAsRateFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFromRegionLoadAsRateFunction</a></span></code> |
| <div class="block">Class to be used for the subset of RegionLoad costs that should be treated as rates.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFromRegionLoadFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFromRegionLoadFunction</a></span></code> |
| <div class="block">Base class the allows writing costs functions from rolling average of some |
| number from RegionLoad.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFunction</a></span></code> |
| <div class="block">Base class of StochasticLoadBalancer's Cost Functions.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CPRequestCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CPRequestCostFunction</a></span></code> |
| <div class="block">Compute the cost of total number of coprocessor requests The more unbalanced the higher the |
| computed cost will be.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.LocalityBasedCostFunction</a></span></code> |
| <div class="block">Compute a cost of a potential cluster configuration based upon where |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver"><code>HStoreFile</code></a>s are located.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.MemStoreSizeCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.MemStoreSizeCostFunction</a></span></code> |
| <div class="block">Compute the cost of total memstore size.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.MoveCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.MoveCostFunction</a></span></code> |
| <div class="block">Given the starting state of the regions and a potential ending state |
| compute cost based upon the number of regions that have moved.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.PrimaryRegionCountSkewCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.PrimaryRegionCountSkewCostFunction</a></span></code> |
| <div class="block">Compute the cost of a potential cluster state from skew in number of |
| primary regions on a cluster.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RackLocalityCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RackLocalityCostFunction</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RandomCandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RandomCandidateGenerator</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.ReadRequestCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.ReadRequestCostFunction</a></span></code> |
| <div class="block">Compute the cost of total number of read requests The more unbalanced the higher the |
| computed cost will be.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RegionCountSkewCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RegionCountSkewCostFunction</a></span></code> |
| <div class="block">Compute the cost of a potential cluster state from skew in number of |
| regions on a cluster.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RegionReplicaHostCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RegionReplicaHostCostFunction</a></span></code> |
| <div class="block">A cost function for region replicas.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RegionReplicaRackCandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RegionReplicaRackCandidateGenerator</a></span></code> |
| <div class="block">Generates candidates which moves the replicas out of the rack for |
| co-hosted region replicas in the same rack</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RegionReplicaRackCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RegionReplicaRackCostFunction</a></span></code> |
| <div class="block">A cost function for region replicas for the rack distribution.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.ServerLocalityCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.ServerLocalityCostFunction</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.StoreFileCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.StoreFileCostFunction</a></span></code> |
| <div class="block">Compute the cost of total open storefiles size.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.TableSkewCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.TableSkewCostFunction</a></span></code> |
| <div class="block">Compute the cost of a potential cluster configuration based upon how evenly |
| distributed tables are.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.WriteRequestCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.WriteRequestCostFunction</a></span></code> |
| <div class="block">Compute the cost of total number of write requests.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="nested.classes.inherited.from.class.org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer"> |
| <!-- --> |
| </a> |
| <h3>Nested classes/interfaces inherited from class org.apache.hadoop.hbase.master.balancer.<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.summary"> |
| <!-- --> |
| </a> |
| <h3>Field Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">CandidateGenerator</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#candidateGenerators">candidateGenerators</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#COST_FUNCTIONS_COST_FUNCTIONS_KEY">COST_FUNCTIONS_COST_FUNCTIONS_KEY</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFunction</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#costFunctions">costFunctions</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#curFunctionCosts">curFunctionCosts</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#curOverallCost">curOverallCost</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#KEEP_REGION_LOADS">KEEP_REGION_LOADS</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Deque.html?is-external=true" title="class or interface in java.util">Deque</a><<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerRegionLoad.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerRegionLoad</a>>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#loads">loads</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/LocalityBasedCandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">LocalityBasedCandidateGenerator</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#localityCandidateGenerator">localityCandidateGenerator</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.ServerLocalityCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.ServerLocalityCostFunction</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#localityCost">localityCost</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#MAX_RUNNING_TIME_KEY">MAX_RUNNING_TIME_KEY</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#MAX_STEPS_KEY">MAX_STEPS_KEY</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#maxRunningTime">maxRunningTime</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#maxSteps">maxSteps</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#MIN_COST_NEED_BALANCE_KEY">MIN_COST_NEED_BALANCE_KEY</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private float</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#minCostNeedBalance">minCostNeedBalance</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#numRegionLoadsToRemember">numRegionLoadsToRemember</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RackLocalityCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RackLocalityCostFunction</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#rackLocalityCost">rackLocalityCost</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Random.html?is-external=true" title="class or interface in java.util">Random</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#RANDOM">RANDOM</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFromRegionLoadFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFromRegionLoadFunction</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#regionLoadFunctions">regionLoadFunctions</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RegionReplicaHostCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RegionReplicaHostCostFunction</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#regionReplicaHostCostFunction">regionReplicaHostCostFunction</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RegionReplicaRackCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RegionReplicaRackCostFunction</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#regionReplicaRackCostFunction">regionReplicaRackCostFunction</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#RUN_MAX_STEPS_KEY">RUN_MAX_STEPS_KEY</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#runMaxSteps">runMaxSteps</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#STEPS_PER_REGION_KEY">STEPS_PER_REGION_KEY</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#stepsPerRegion">stepsPerRegion</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#TABLE_FUNCTION_SEP">TABLE_FUNCTION_SEP</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#tempFunctionCosts">tempFunctionCosts</a></span></code> </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="fields.inherited.from.class.org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer"> |
| <!-- --> |
| </a> |
| <h3>Fields inherited from class org.apache.hadoop.hbase.master.balancer.<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#BALANCER_DECISION_BUFFER_ENABLED">BALANCER_DECISION_BUFFER_ENABLED</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#clusterStatus">clusterStatus</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#config">config</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#DEFAULT_BALANCER_DECISION_BUFFER_ENABLED">DEFAULT_BALANCER_DECISION_BUFFER_ENABLED</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#IDLE_SERVER_PREDICATOR">IDLE_SERVER_PREDICATOR</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#isByTable">isByTable</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#maintenanceMode">maintenanceMode</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#masterServerName">masterServerName</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#metricsBalancer">metricsBalancer</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#MIN_SERVER_BALANCE">MIN_SERVER_BALANCE</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#namedQueueRecorder">namedQueueRecorder</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#onlySystemTablesOnMaster">onlySystemTablesOnMaster</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#overallSlop">overallSlop</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#rackManager">rackManager</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#regionFinder">regionFinder</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#services">services</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#slop">slop</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#useRegionFinder">useRegionFinder</a></code></li> |
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| <li class="blockList"><a name="fields.inherited.from.class.org.apache.hadoop.hbase.master.LoadBalancer"> |
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| <h3>Fields inherited from interface org.apache.hadoop.hbase.master.<a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#BOGUS_SERVER_NAME">BOGUS_SERVER_NAME</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#HBASE_RSGROUP_LOADBALANCER_CLASS">HBASE_RSGROUP_LOADBALANCER_CLASS</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#SYSTEM_TABLES_ON_MASTER">SYSTEM_TABLES_ON_MASTER</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#TABLES_ON_MASTER">TABLES_ON_MASTER</a></code></li> |
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| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
| <!-- --> |
| </a> |
| <h3>Constructor Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#StochasticLoadBalancer--">StochasticLoadBalancer</a></span>()</code> |
| <div class="block">The constructor that pass a MetricsStochasticBalancer to BaseLoadBalancer to replace its |
| default MetricsBalancer</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.summary"> |
| <!-- --> |
| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#addCostFunction-org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.CostFunction-">addCostFunction</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFunction</a> costFunction)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#areSomeRegionReplicasColocated-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">areSomeRegionReplicasColocated</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> c)</code> |
| <div class="block">Subclasses should implement this to return true if the cluster has nodes that hosts |
| multiple replicas for the same region, or, if there are multiple racks and the same |
| rack hosts replicas of the same region</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-">balanceTable</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>>> loadOfOneTable)</code> |
| <div class="block">Given the cluster state this will try and approach an optimal balance.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#composeAttributeName-java.lang.String-java.lang.String-">composeAttributeName</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> tableName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> costFunctionName)</code> |
| <div class="block">A helper function to compose the attribute name from tablename and costfunction name</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>protected double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#computeCost-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-double-">computeCost</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster, |
| double previousCost)</code> |
| <div class="block">This is the main cost function.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#createRegionPlans-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">createRegionPlans</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster)</code> |
| <div class="block">Create all of the RegionPlan's needed to move from the initial cluster state to the desired |
| state.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#functionCost--">functionCost</a></span>()</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">CandidateGenerator</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#getCandidateGenerators--">getCandidateGenerators</a></span>()</code> |
| <div class="block">Exposed for Testing!</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#getCostFunctionNames--">getCostFunctionNames</a></span>()</code> |
| <div class="block">Get the names of the cost functions</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#initCosts-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">initCosts</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster)</code> </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#loadCustomCostFunctions-org.apache.hadoop.conf.Configuration-">loadCustomCostFunctions</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#needsBalance-org.apache.hadoop.hbase.TableName-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">needsBalance</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName, |
| <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster)</code> </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>(package private) <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster.Action</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#nextAction-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">nextAction</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster)</code> </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">onConfigurationChange</a></span>(org.apache.hadoop.conf.Configuration conf)</code> |
| <div class="block">Notification that config has changed</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#sendRegionPlansToRingBuffer-java.util.List-double-double-java.lang.String-long-">sendRegionPlansToRingBuffer</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>> plans, |
| double currentCost, |
| double initCost, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> initFunctionTotalCosts, |
| long step)</code> </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#setCandidateGenerators-java.util.List-">setCandidateGenerators</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">CandidateGenerator</a>> customCandidateGenerators)</code> </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#setClusterMetrics-org.apache.hadoop.hbase.ClusterMetrics-">setClusterMetrics</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/ClusterMetrics.html" title="interface in org.apache.hadoop.hbase">ClusterMetrics</a> st)</code> |
| <div class="block">Set the current cluster status.</div> |
| </td> |
| </tr> |
| <tr id="i17" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> |
| </tr> |
| <tr id="i18" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#setMasterServices-org.apache.hadoop.hbase.master.MasterServices-">setMasterServices</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a> masterServices)</code> |
| <div class="block">Set the master service.</div> |
| </td> |
| </tr> |
| <tr id="i19" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#setSlop-org.apache.hadoop.conf.Configuration-">setSlop</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> |
| </tr> |
| <tr id="i20" class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#totalCostsPerFunc--">totalCostsPerFunc</a></span>()</code> </td> |
| </tr> |
| <tr id="i21" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#updateCostsWithAction-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster.Action-">updateCostsWithAction</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster, |
| <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster.Action</a> action)</code> </td> |
| </tr> |
| <tr id="i22" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#updateMetricsSize-int-">updateMetricsSize</a></span>(int size)</code> |
| <div class="block">Update the number of metrics that are reported to JMX</div> |
| </td> |
| </tr> |
| <tr id="i23" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#updateRegionLoad--">updateRegionLoad</a></span>()</code> |
| <div class="block">Store the current region loads.</div> |
| </td> |
| </tr> |
| <tr id="i24" class="altColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#updateStochasticCosts-org.apache.hadoop.hbase.TableName-java.lang.Double-java.lang.Double:A-">updateStochasticCosts</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a> overall, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>[] subCosts)</code> |
| <div class="block">update costs to JMX</div> |
| </td> |
| </tr> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| <li class="blockList"><a name="constructor.detail"> |
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| <h3>Constructor Detail</h3> |
| <a name="StochasticLoadBalancer--"> |
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| <h4>StochasticLoadBalancer</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.165">StochasticLoadBalancer</a>()</pre> |
| <div class="block">The constructor that pass a MetricsStochasticBalancer to BaseLoadBalancer to replace its |
| default MetricsBalancer</div> |
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| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.170">onConfigurationChange</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">LoadBalancer</a></code></span></div> |
| <div class="block">Notification that config has changed</div> |
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| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/conf/ConfigurationObserver.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">onConfigurationChange</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/conf/ConfigurationObserver.html" title="interface in org.apache.hadoop.hbase.conf">ConfigurationObserver</a></code></dd> |
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| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
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| <a name="setConf-org.apache.hadoop.conf.Configuration-"> |
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| <h4>setConf</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.175">setConf</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code>setConf</code> in interface <code>org.apache.hadoop.conf.Configurable</code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></code> in class <code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></code></dd> |
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| <h4>loadCustomCostFunctions</h4> |
| <pre>private void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.238">loadCustomCostFunctions</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
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| <h4>setCandidateGenerators</h4> |
| <pre>protected void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.262">setCandidateGenerators</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">CandidateGenerator</a>> customCandidateGenerators)</pre> |
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| <div class="block">Exposed for Testing!</div> |
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| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
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| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.279">setClusterMetrics</a>(<a href="../../../../../../org/apache/hadoop/hbase/ClusterMetrics.html" title="interface in org.apache.hadoop.hbase">ClusterMetrics</a> st)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#setClusterMetrics-org.apache.hadoop.hbase.ClusterMetrics-">LoadBalancer</a></code></span></div> |
| <div class="block">Set the current cluster status. This allows a LoadBalancer to map host name to a server</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#setClusterMetrics-org.apache.hadoop.hbase.ClusterMetrics-">setClusterMetrics</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
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| <a name="updateMetricsSize-int-"> |
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| <h4>updateMetricsSize</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.301">updateMetricsSize</a>(int size)</pre> |
| <div class="block">Update the number of metrics that are reported to JMX</div> |
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| <a name="setMasterServices-org.apache.hadoop.hbase.master.MasterServices-"> |
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| </a> |
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| <h4>setMasterServices</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.308">setMasterServices</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a> masterServices)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#setMasterServices-org.apache.hadoop.hbase.master.MasterServices-">LoadBalancer</a></code></span></div> |
| <div class="block">Set the master service.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#setMasterServices-org.apache.hadoop.hbase.master.MasterServices-">setMasterServices</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
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| </dl> |
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| <a name="areSomeRegionReplicasColocated-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-"> |
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| <h4>areSomeRegionReplicasColocated</h4> |
| <pre>protected boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.316">areSomeRegionReplicasColocated</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> c)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#areSomeRegionReplicasColocated-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">BaseLoadBalancer</a></code></span></div> |
| <div class="block">Subclasses should implement this to return true if the cluster has nodes that hosts |
| multiple replicas for the same region, or, if there are multiple racks and the same |
| rack hosts replicas of the same region</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#areSomeRegionReplicasColocated-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">areSomeRegionReplicasColocated</a></code> in class <code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - Cluster information</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>whether region replicas are currently co-located</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="needsBalance-org.apache.hadoop.hbase.TableName-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-"> |
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| <h4>needsBalance</h4> |
| <pre>protected boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.325">needsBalance</a>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName, |
| <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#needsBalance-org.apache.hadoop.hbase.TableName-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">needsBalance</a></code> in class <code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="nextAction-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-"> |
| <!-- --> |
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| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextAction</h4> |
| <pre><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster.Action</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.372">nextAction</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster)</pre> |
| </li> |
| </ul> |
| <a name="balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>balanceTable</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.382">balanceTable</a>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>>> loadOfOneTable)</pre> |
| <div class="block">Given the cluster state this will try and approach an optimal balance. This |
| should always approach the optimal state given enough steps.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-">balanceTable</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-">balanceTable</a></code> in class <code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>tableName</code> - the table to be balanced</dd> |
| <dd><code>loadOfOneTable</code> - region load of servers for the specific one table</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>List of plans</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="sendRegionPlansToRingBuffer-java.util.List-double-double-java.lang.String-long-"> |
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| <h4>sendRegionPlansToRingBuffer</h4> |
| <pre>private void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.503">sendRegionPlansToRingBuffer</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>> plans, |
| double currentCost, |
| double initCost, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> initFunctionTotalCosts, |
| long step)</pre> |
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| </ul> |
| <a name="updateStochasticCosts-org.apache.hadoop.hbase.TableName-java.lang.Double-java.lang.Double:A-"> |
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| <h4>updateStochasticCosts</h4> |
| <pre>private void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.527">updateStochasticCosts</a>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a> overall, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>[] subCosts)</pre> |
| <div class="block">update costs to JMX</div> |
| </li> |
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| <a name="addCostFunction-org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.CostFunction-"> |
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| <h4>addCostFunction</h4> |
| <pre>private void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.549">addCostFunction</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFunction</a> costFunction)</pre> |
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| <pre>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.555">functionCost</a>()</pre> |
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| <pre>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.568">totalCostsPerFunc</a>()</pre> |
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| <a name="createRegionPlans-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-"> |
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| <h4>createRegionPlans</h4> |
| <pre>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.592">createRegionPlans</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster)</pre> |
| <div class="block">Create all of the RegionPlan's needed to move from the initial cluster state to the desired |
| state.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cluster</code> - The state of the cluster</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>List of RegionPlan's that represent the moves needed to get to desired final state.</dd> |
| </dl> |
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| <pre>private void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.618">updateRegionLoad</a>()</pre> |
| <div class="block">Store the current region loads.</div> |
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| <a name="initCosts-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-"> |
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| <h4>initCosts</h4> |
| <pre>protected void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.643">initCosts</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster)</pre> |
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| <a name="updateCostsWithAction-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster.Action-"> |
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| <pre>protected void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.649">updateCostsWithAction</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster, |
| <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster.Action</a> action)</pre> |
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| <h4>getCostFunctionNames</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[] <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.658">getCostFunctionNames</a>()</pre> |
| <div class="block">Get the names of the cost functions</div> |
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| <pre>protected double <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.678">computeCost</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a> cluster, |
| double previousCost)</pre> |
| <div class="block">This is the main cost function. It will compute a cost associated with a proposed cluster |
| state. All different costs will be combined with their multipliers to produce a double cost.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cluster</code> - The state of the cluster</dd> |
| <dd><code>previousCost</code> - the previous cost. This is used as an early out.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a double of a cost associated with the proposed cluster state. This cost is an |
| aggregate of all individual cost functions.</dd> |
| </dl> |
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| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.1541">composeAttributeName</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> tableName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> costFunctionName)</pre> |
| <div class="block">A helper function to compose the attribute name from tablename and costfunction name</div> |
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