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| <div class="subTitle">org.apache.hadoop.hbase.regionserver</div> |
| <h2 title="Class BusyRegionSplitPolicy" class="title">Class BusyRegionSplitPolicy</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> |
| <li> |
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| <li>org.apache.hadoop.conf.Configured</li> |
| <li> |
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| <li><a href="../../../../../org/apache/hadoop/hbase/regionserver/RegionSplitPolicy.html" title="class in org.apache.hadoop.hbase.regionserver">org.apache.hadoop.hbase.regionserver.RegionSplitPolicy</a></li> |
| <li> |
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| <li><a href="../../../../../org/apache/hadoop/hbase/regionserver/ConstantSizeRegionSplitPolicy.html" title="class in org.apache.hadoop.hbase.regionserver">org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.html" title="class in org.apache.hadoop.hbase.regionserver">org.apache.hadoop.hbase.regionserver.IncreasingToUpperBoundRegionSplitPolicy</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.hadoop.hbase.regionserver.BusyRegionSplitPolicy</li> |
| </ul> |
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| <dd>org.apache.hadoop.conf.Configurable</dd> |
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| <pre>@InterfaceAudience.LimitedPrivate(value="Configuration") |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#line.40">BusyRegionSplitPolicy</a> |
| extends <a href="../../../../../org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.html" title="class in org.apache.hadoop.hbase.regionserver">IncreasingToUpperBoundRegionSplitPolicy</a></pre> |
| <div class="block">This class represents a split policy which makes the split decision based |
| on how busy a region is. The metric that is used here is the fraction of |
| total write requests that are blocked due to high memstore utilization. |
| This fractional rate is calculated over a running window of |
| "hbase.busy.policy.aggWindow" milliseconds. The rate is a time-weighted |
| aggregated average of the rate in the current window and the |
| true average rate in the previous window.</div> |
| </li> |
| </ul> |
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| <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 long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#aggregationWindow">aggregationWindow</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/regionserver/BusyRegionSplitPolicy.html#blockedRate">blockedRate</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/regionserver/BusyRegionSplitPolicy.html#blockedRequestCount">blockedRequestCount</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#DEFAULT_AGGREGATION_WINDOW">DEFAULT_AGGREGATION_WINDOW</a></span></code> </td> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>static float</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#DEFAULT_MAX_BLOCKED_REQUESTS">DEFAULT_MAX_BLOCKED_REQUESTS</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#DEFAULT_MIN_AGE_MS">DEFAULT_MIN_AGE_MS</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#LOG">LOG</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/regionserver/BusyRegionSplitPolicy.html#maxBlockedRequests">maxBlockedRequests</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/regionserver/BusyRegionSplitPolicy.html#minAge">minAge</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#prevTime">prevTime</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#region">region</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#startTime">startTime</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/regionserver/BusyRegionSplitPolicy.html#writeRequestCount">writeRequestCount</a></span></code> </td> |
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| <code><a href="../../../../../org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.html#initialSize">initialSize</a></code></li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#BusyRegionSplitPolicy--">BusyRegionSplitPolicy</a></span>()</code> </td> |
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| <tr> |
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| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#configureForRegion-org.apache.hadoop.hbase.regionserver.HRegion-">configureForRegion</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a> region)</code> |
| <div class="block">Upon construction, this method will be called with the region |
| to be governed.</div> |
| </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/regionserver/BusyRegionSplitPolicy.html#init--">init</a></span>()</code> </td> |
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| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#shouldSplit--">shouldSplit</a></span>()</code> </td> |
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| <tr id="i3" class="rowColor"> |
| <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/regionserver/BusyRegionSplitPolicy.html#toString--">toString</a></span>()</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>private float</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/BusyRegionSplitPolicy.html#updateRate--">updateRate</a></span>()</code> |
| <div class="block">Update the blocked request rate based on number of blocked and total write requests in the |
| last aggregation window, or since last call to this method, whichever is farthest in time.</div> |
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| <code><a href="../../../../../org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.html#getSizeToCheck-int-">getSizeToCheck</a></code></li> |
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| <dd><a href="../../../../../constant-values.html#org.apache.hadoop.hbase.regionserver.BusyRegionSplitPolicy.DEFAULT_MIN_AGE_MS">Constant Field Values</a></dd> |
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| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/hadoop/hbase/regionserver/RegionSplitPolicy.html#configureForRegion-org.apache.hadoop.hbase.regionserver.HRegion-">RegionSplitPolicy</a></code></span></div> |
| <div class="block">Upon construction, this method will be called with the region |
| to be governed. It will be called once and only once.</div> |
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| <dd><code><a href="../../../../../org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.html#shouldSplit--">shouldSplit</a></code> in class <code><a href="../../../../../org/apache/hadoop/hbase/regionserver/IncreasingToUpperBoundRegionSplitPolicy.html" title="class in org.apache.hadoop.hbase.regionserver">IncreasingToUpperBoundRegionSplitPolicy</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the specified region should be split.</dd> |
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| <div class="block">Update the blocked request rate based on number of blocked and total write requests in the |
| last aggregation window, or since last call to this method, whichever is farthest in time. |
| Uses weighted rate calculation based on the previous rate and new data.</div> |
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| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Updated blocked request rate.</dd> |
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