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<h2 title="Class FavoredNodeLoadBalancer" class="title">Class FavoredNodeLoadBalancer</h2>
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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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<ul class="inheritance">
<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.favored.FavoredNodeLoadBalancer</li>
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<div class="description">
<ul class="blockList">
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<dl>
<dt>All Implemented Interfaces:</dt>
<dd><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/favored/FavoredNodesPromoter.html" title="interface in org.apache.hadoop.hbase.favored">FavoredNodesPromoter</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>
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<pre>@InterfaceAudience.LimitedPrivate(value="Configuration")
public class <a href="../../../../../src-html/org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#line.61">FavoredNodeLoadBalancer</a>
extends <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a>
implements <a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodesPromoter.html" title="interface in org.apache.hadoop.hbase.favored">FavoredNodesPromoter</a></pre>
<div class="block">An implementation of the <a href="../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master"><code>LoadBalancer</code></a> that assigns favored
nodes for each region. There is a Primary RegionServer that hosts the region, and then there is
Secondary and Tertiary RegionServers. Currently, the favored nodes information is used in
creating HDFS files - the Primary RegionServer passes the primary, secondary, tertiary node
addresses as hints to the DistributedFileSystem API for creating files on the filesystem. These
nodes are treated as hints by the HDFS to place the blocks of the file. This alleviates the
problem to do with reading from remote nodes (since we can make the Secondary RegionServer as the
new Primary RegionServer) after a region is recovered. This should help provide consistent read
latencies for the regions even when their primary region servers die.</div>
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<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">&nbsp;</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="../../../../../org/apache/hadoop/hbase/favored/FavoredNodesManager.html" title="class in org.apache.hadoop.hbase.favored">FavoredNodesManager</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#fnm">fnm</a></span></code>&nbsp;</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/favored/FavoredNodeLoadBalancer.html#LOG">LOG</a></span></code>&nbsp;</td>
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<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#BALANCER_REJECTION_BUFFER_ENABLED">BALANCER_REJECTION_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#DEFAULT_BALANCER_DECISION_BUFFER_ENABLED">DEFAULT_BALANCER_DECISION_BUFFER_ENABLED</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#DEFAULT_BALANCER_REJECTION_BUFFER_ENABLED">DEFAULT_BALANCER_REJECTION_BUFFER_ENABLED</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#DEFAULT_HBASE_MASTER_LOADBALANCE_BYTABLE">DEFAULT_HBASE_MASTER_LOADBALANCE_BYTABLE</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#isByTable">isByTable</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#provider">provider</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#slop">slop</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#useRegionFinder">useRegionFinder</a></code></li>
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<h3>Fields inherited from interface&nbsp;org.apache.hadoop.hbase.favored.<a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodesPromoter.html" title="interface in org.apache.hadoop.hbase.favored">FavoredNodesPromoter</a></h3>
<code><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodesPromoter.html#FAVORED_ALWAYS_ASSIGN_REGIONS">FAVORED_ALWAYS_ASSIGN_REGIONS</a></code></li>
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<h3>Fields inherited from interface&nbsp;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></code></li>
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<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/favored/FavoredNodeLoadBalancer.html#FavoredNodeLoadBalancer--">FavoredNodeLoadBalancer</a></span>()</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#addRegionToMap-java.util.Map-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.ServerName-">addRegionToMap</a></span>(<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>&lt;<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;&nbsp;assignmentMapForFavoredNodes,
<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;region,
<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;host)</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#assignRegionToAvailableFavoredNode-java.util.Map-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.ServerName-org.apache.hadoop.hbase.ServerName-org.apache.hadoop.hbase.ServerName-">assignRegionToAvailableFavoredNode</a></span>(<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>&lt;<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;&nbsp;assignmentMapForFavoredNodes,
<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;region,
<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;primaryHost,
<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;secondaryHost,
<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;tertiaryHost)</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#assignSecondaryAndTertiaryNodesForRegion-org.apache.hadoop.hbase.favored.FavoredNodeAssignmentHelper-java.util.List-java.util.Map-">assignSecondaryAndTertiaryNodesForRegion</a></span>(<a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.html" title="class in org.apache.hadoop.hbase.favored">FavoredNodeAssignmentHelper</a>&nbsp;assignmentHelper,
<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions,
<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>,<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;primaryRSMap)</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#availableServersContains-java.util.List-org.apache.hadoop.hbase.ServerName-">availableServersContains</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>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers,
<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;favoredNode)</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>protected <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>&lt;<a href="../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.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>&nbsp;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>&lt;<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;&nbsp;loadOfOneTable)</code>
<div class="block">Perform the major balance operation for table, all sub classes should override this method.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#generateFavoredNodesForDaughter-java.util.List-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.client.RegionInfo-">generateFavoredNodesForDaughter</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>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers,
<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;parent,
<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionA,
<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionB)</code>&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#generateFavoredNodesForMergedRegion-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.client.RegionInfo:A-">generateFavoredNodesForMergedRegion</a></span>(<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;merged,
<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>[]&nbsp;mergeParents)</code>&nbsp;</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>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#getFavoredNodes-org.apache.hadoop.hbase.client.RegionInfo-">getFavoredNodes</a></span>(<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo)</code>&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#getInheritedFNForDaughter-org.apache.hadoop.hbase.favored.FavoredNodeAssignmentHelper-java.util.List-org.apache.hadoop.hbase.favored.FavoredNodesPlan.Position-org.apache.hadoop.hbase.favored.FavoredNodesPlan.Position-">getInheritedFNForDaughter</a></span>(<a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.html" title="class in org.apache.hadoop.hbase.favored">FavoredNodeAssignmentHelper</a>&nbsp;helper,
<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;parentFavoredNodes,
<a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodesPlan.Position.html" title="enum in org.apache.hadoop.hbase.favored">FavoredNodesPlan.Position</a>&nbsp;primary,
<a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodesPlan.Position.html" title="enum in org.apache.hadoop.hbase.favored">FavoredNodesPlan.Position</a>&nbsp;secondary)</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td>
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<div class="block">Used to assign a single region to a random server.</div>
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<td class="colFirst"><code><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>&lt;<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#roundRobinAssignment-java.util.List-java.util.List-">roundRobinAssignment</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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions,
<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)</code>
<div class="block">Generates a bulk assignment plan to be used on cluster startup using a simple round-robin
assignment.</div>
</td>
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<tr id="i11" class="rowColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#roundRobinAssignmentImpl-org.apache.hadoop.hbase.favored.FavoredNodeAssignmentHelper-java.util.Map-java.util.List-">roundRobinAssignmentImpl</a></span>(<a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.html" title="class in org.apache.hadoop.hbase.favored">FavoredNodeAssignmentHelper</a>&nbsp;assignmentHelper,
<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>&lt;<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;&nbsp;assignmentMap,
<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions)</code>&nbsp;</td>
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<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a>&lt;<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>&lt;<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;,<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#segregateRegionsAndAssignRegionsWithFavoredNodes-java.util.List-java.util.List-">segregateRegionsAndAssignRegionsWithFavoredNodes</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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions,
<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;availableServers)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#setFavoredNodesManager-org.apache.hadoop.hbase.favored.FavoredNodesManager-">setFavoredNodesManager</a></span>(<a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodesManager.html" title="class in org.apache.hadoop.hbase.favored">FavoredNodesManager</a>&nbsp;fnm)</code>&nbsp;</td>
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<code><a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#balanceCluster-java.util.Map-">balanceCluster</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#getConf--">getConf</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#getDefaultSlop--">getDefaultSlop</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#idleRegionServerExist-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-">idleRegionServerExist</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#initialize--">initialize</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#isStopped--">isStopped</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#loadConf-org.apache.hadoop.conf.Configuration-">loadConf</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">onConfigurationChange</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#postMasterStartupInitialize--">postMasterStartupInitialize</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#preBalanceCluster-java.util.Map-">preBalanceCluster</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#regionOffline-org.apache.hadoop.hbase.client.RegionInfo-">regionOffline</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#regionOnline-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.ServerName-">regionOnline</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#retainAssignment-java.util.Map-java.util.List-">retainAssignment</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#setClusterInfoProvider-org.apache.hadoop.hbase.master.balancer.ClusterInfoProvider-">setClusterInfoProvider</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#sloppyRegionServerExist-org.apache.hadoop.hbase.master.balancer.ClusterLoadState-">sloppyRegionServerExist</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#stop-java.lang.String-">stop</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#toEnsumbleTableLoad-java.util.Map-">toEnsumbleTableLoad</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#updateBalancerStatus-boolean-">updateBalancerStatus</a>, <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#updateClusterMetrics-org.apache.hadoop.hbase.ClusterMetrics-">updateClusterMetrics</a></code></li>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<code><a href="../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#updateBalancerLoadInfo-java.util.Map-">updateBalancerLoadInfo</a></code></li>
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<pre>public&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#line.61">FavoredNodeLoadBalancer</a>()</pre>
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<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodesPromoter.html#setFavoredNodesManager-org.apache.hadoop.hbase.favored.FavoredNodesManager-">setFavoredNodesManager</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/favored/FavoredNodesPromoter.html" title="interface in org.apache.hadoop.hbase.favored">FavoredNodesPromoter</a></code></dd>
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<h4>balanceTable</h4>
<pre>protected&nbsp;<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>&gt;&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#line.72">balanceTable</a>(<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;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>&lt;<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;&nbsp;loadOfOneTable)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-">BaseLoadBalancer</a></code></span></div>
<div class="block">Perform the major balance operation for table, all sub classes should override this method.
<p/>
Will be invoked by <a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#balanceCluster-java.util.Map-"><code>BaseLoadBalancer.balanceCluster(Map)</code></a>. If
<a href="../../../../../org/apache/hadoop/hbase/HConstants.html#HBASE_MASTER_LOADBALANCE_BYTABLE"><code>HConstants.HBASE_MASTER_LOADBALANCE_BYTABLE</code></a> is enabled, we will call this method
multiple times, one table a time, where we will only pass in the regions for a single table
each time. If not, we will pass in all the regions at once, and the <code>tableName</code> will be
<a href="../../../../../org/apache/hadoop/hbase/HConstants.html#ENSEMBLE_TABLE_NAME"><code>HConstants.ENSEMBLE_TABLE_NAME</code></a>.</div>
<dl>
<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>&nbsp;in class&nbsp;<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>
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<pre>@NonNull
public&nbsp;<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>&lt;<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#line.136">roundRobinAssignment</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>&lt;<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions,
<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)
throws <a href="../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#roundRobinAssignment-java.util.List-java.util.List-">BaseLoadBalancer</a></code></span></div>
<div class="block">Generates a bulk assignment plan to be used on cluster startup using a simple round-robin
assignment.
<p/>
Takes a list of all the regions and all the servers in the cluster and returns a map of each
server to the regions that it should be assigned.
<p/>
Currently implemented as a round-robin assignment. Same invariant as load balancing, all
servers holding floor(avg) or ceiling(avg). TODO: Use block locations from HDFS to place
regions with their blocks</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#roundRobinAssignment-java.util.List-java.util.List-">roundRobinAssignment</a></code>&nbsp;in interface&nbsp;<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>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#roundRobinAssignment-java.util.List-java.util.List-">roundRobinAssignment</a></code>&nbsp;in class&nbsp;<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>regions</code> - all regions</dd>
<dd><code>servers</code> - all servers</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>map of server to the regions it should take, or emptyMap if no assignment is possible
(ie. no servers)</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></code></dd>
</dl>
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<pre>public&nbsp;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/favored/FavoredNodeLoadBalancer.html#line.179">randomAssignment</a>(<a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo,
<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>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)
throws <a href="../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#randomAssignment-org.apache.hadoop.hbase.client.RegionInfo-java.util.List-">BaseLoadBalancer</a></code></span></div>
<div class="block">Used to assign a single region to a random server.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#randomAssignment-org.apache.hadoop.hbase.client.RegionInfo-java.util.List-">randomAssignment</a></code>&nbsp;in interface&nbsp;<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>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#randomAssignment-org.apache.hadoop.hbase.client.RegionInfo-java.util.List-">randomAssignment</a></code>&nbsp;in class&nbsp;<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>regionInfo</code> - Region for which this selection is being done.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></code></dd>
</dl>
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