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Posted to commits@hbase.apache.org by gi...@apache.org on 2021/09/25 20:17:25 UTC
[hbase-site] branch asf-site updated: Published site at
2b26dfbaf47f64e45aef6627b248c3327f5b9a3a.
This is an automated email from the ASF dual-hosted git repository.
git-site-role pushed a commit to branch asf-site
in repository https://gitbox.apache.org/repos/asf/hbase-site.git
The following commit(s) were added to refs/heads/asf-site by this push:
new 9701af5 Published site at 2b26dfbaf47f64e45aef6627b248c3327f5b9a3a.
9701af5 is described below
commit 9701af5245cbb41453cbe136602e6fb8f86b374a
Author: jenkins <bu...@apache.org>
AuthorDate: Sat Sep 25 20:17:15 2021 +0000
Published site at 2b26dfbaf47f64e45aef6627b248c3327f5b9a3a.
---
acid-semantics.html | 2 +-
apache_hbase_reference_guide.pdf | 4 +-
book.html | 2 +-
bulk-loads.html | 2 +-
checkstyle-aggregate.html | 18 +-
coc.html | 2 +-
dependencies.html | 2 +-
dependency-convergence.html | 6 +-
dependency-info.html | 2 +-
dependency-management.html | 2 +-
devapidocs/index-all.html | 30 +-
.../apache/hadoop/hbase/backup/package-tree.html | 4 +-
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.../hadoop/hbase/hbtop/field/package-tree.html | 2 +-
.../hadoop/hbase/hbtop/terminal/package-tree.html | 2 +-
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.../hadoop/hbase/mapreduce/package-tree.html | 2 +-
.../hbase/master/assignment/package-tree.html | 2 +-
.../BalancerClusterState.DefaultRackManager.html | 6 +-
.../BalancerClusterState.LocalityType.html | 6 +-
.../master/balancer/BalancerClusterState.html | 359 +++--
.../balancer/RegionReplicaCandidateGenerator.html | 18 +-
.../RegionReplicaGroupingCostFunction.html | 26 +-
.../balancer/RegionReplicaHostCostFunction.html | 28 +-
.../RegionReplicaRackCandidateGenerator.html | 2 +-
.../balancer/RegionReplicaRackCostFunction.html | 2 +-
.../hadoop/hbase/master/balancer/package-tree.html | 2 +-
.../apache/hadoop/hbase/master/package-tree.html | 4 +-
.../hadoop/hbase/monitoring/package-tree.html | 2 +-
.../org/apache/hadoop/hbase/package-tree.html | 16 +-
.../hadoop/hbase/procedure2/package-tree.html | 6 +-
.../hbase/procedure2/store/wal/package-tree.html | 2 +-
.../apache/hadoop/hbase/quotas/package-tree.html | 4 +-
.../hadoop/hbase/regionserver/package-tree.html | 18 +-
.../hbase/regionserver/wal/package-tree.html | 6 +-
.../hadoop/hbase/security/access/package-tree.html | 6 +-
.../apache/hadoop/hbase/security/package-tree.html | 2 +-
.../apache/hadoop/hbase/thrift/package-tree.html | 2 +-
.../org/apache/hadoop/hbase/util/package-tree.html | 10 +-
.../BalancerClusterState.DefaultRackManager.html | 1653 ++++++++++----------
.../BalancerClusterState.LocalityType.html | 1653 ++++++++++----------
.../master/balancer/BalancerClusterState.html | 1653 ++++++++++----------
.../balancer/RegionReplicaCandidateGenerator.html | 154 +-
.../RegionReplicaGroupingCostFunction.html | 160 +-
.../balancer/RegionReplicaHostCostFunction.html | 106 +-
.../RegionReplicaRackCandidateGenerator.html | 2 +-
.../balancer/RegionReplicaRackCostFunction.html | 8 +-
downloads.html | 2 +-
export_control.html | 2 +-
index.html | 2 +-
issue-tracking.html | 2 +-
mail-lists.html | 2 +-
metrics.html | 2 +-
old_news.html | 2 +-
plugin-management.html | 2 +-
plugins.html | 2 +-
poweredbyhbase.html | 2 +-
project-info.html | 2 +-
project-reports.html | 2 +-
project-summary.html | 2 +-
pseudo-distributed.html | 2 +-
replication.html | 2 +-
resources.html | 2 +-
source-repository.html | 2 +-
sponsors.html | 2 +-
supportingprojects.html | 2 +-
team-list.html | 2 +-
.../hadoop/hbase/chaos/actions/package-tree.html | 2 +-
.../apache/hadoop/hbase/io/hfile/package-tree.html | 2 +-
.../TestStochasticLoadBalancer.MockCluster.html | 76 +-
.../org/apache/hadoop/hbase/package-tree.html | 14 +-
.../hadoop/hbase/procedure/package-tree.html | 8 +-
.../hadoop/hbase/procedure2/package-tree.html | 2 +-
.../hadoop/hbase/regionserver/package-tree.html | 8 +-
.../org/apache/hadoop/hbase/test/package-tree.html | 6 +-
.../org/apache/hadoop/hbase/wal/package-tree.html | 2 +-
...rRegionReplicaWithRacks.ForTestRackManager.html | 10 +-
...ochasticLoadBalancerRegionReplicaWithRacks.html | 10 +-
82 files changed, 3139 insertions(+), 3089 deletions(-)
diff --git a/acid-semantics.html b/acid-semantics.html
index 1f91550..da181c0 100644
--- a/acid-semantics.html
+++ b/acid-semantics.html
@@ -456,7 +456,7 @@
<div class="row">
<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/apache_hbase_reference_guide.pdf b/apache_hbase_reference_guide.pdf
index a9c0844..0e809cc 100644
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/Author (Apache HBase Team)
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2 0 obj
diff --git a/book.html b/book.html
index 2f0e601..acbeec5 100644
--- a/book.html
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<div id="footer">
<div id="footer-text">
Version 3.0.0-alpha-2-SNAPSHOT<br>
-Last updated 2021-09-22 20:05:13 UTC
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<link rel="stylesheet" href="./coderay-asciidoctor.css">
diff --git a/bulk-loads.html b/bulk-loads.html
index b309ac3..6a93f53 100644
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<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
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<tr class="a">
<td>annotation</td>
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<td>Javadoc comment at column 14 has parse error. Details: mismatched input ':' expecting <EOF> while parsing JAVADOC</td>
<td>46</td></tr></table></div>
<div class="section">
@@ -40631,8 +40631,8 @@
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<td>MethodLength</td>
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<td><img src="images/icon_error_sml.gif" alt="" /> Error</td>
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@@ -73488,7 +73488,7 @@
<div class="row">
<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/coc.html b/coc.html
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+++ b/coc.html
@@ -230,7 +230,7 @@ email to <a class="externalLink" href="mailto:private@hbase.apache.org">the priv
<div class="row">
<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/dependencies.html b/dependencies.html
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<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
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<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/dependency-convergence.html b/dependency-convergence.html
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<td>43</td></tr>
<tr class="a">
<th>Number of dependencies (NOD):</th>
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<th>Number of version-conflicting artifacts (NOC):</th>
<td>17</td></tr>
@@ -866,7 +866,7 @@
<div class="row">
<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/dependency-info.html b/dependency-info.html
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<div class="row">
<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/dependency-management.html b/dependency-management.html
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@@ -1190,7 +1190,7 @@
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<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/devapidocs/index-all.html b/devapidocs/index-all.html
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--- a/devapidocs/index-all.html
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<dd> </dd>
<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/regionserver/RSRpcServices.html#checkLimitOfRows-int-int-boolean-org.apache.hadoop.hbase.regionserver.ScannerContext-org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanResponse.Builder-">checkLimitOfRows(int, int, boolean, ScannerContext, ClientProtos.ScanResponse.Builder)</a></span> - Method in class org.apache.hadoop.hbase.regionserver.<a href="org/apache/hadoop/hbase/regionserver/RSRpcServices.html" titl [...]
<dd> </dd>
+<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html#checkLocationForPrimary-int-org.agrona.collections.Int2IntCounterMap:A-int-">checkLocationForPrimary(int, Int2IntCounterMap[], int)</a></span> - Method in class org.apache.hadoop.hbase.master.balancer.<a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a></dt>
+<dd>
+<div class="block">Common method for better solution check.</div>
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<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/security/access/AccessChecker.html#checkLockPermissions-org.apache.hadoop.hbase.security.User-java.lang.String-org.apache.hadoop.hbase.TableName-org.apache.hadoop.hbase.client.RegionInfo:A-java.lang.String-">checkLockPermissions(User, String, TableName, RegionInfo[], String)</a></span> - Method in class org.apache.hadoop.hbase.security.access.<a href="org/apache/hadoop/hbase/security/access/AccessChecker.html" title="class [...]
<dd> </dd>
<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/security/access/AccessController.html#checkLockPermissions-org.apache.hadoop.hbase.coprocessor.ObserverContext-java.lang.String-org.apache.hadoop.hbase.TableName-org.apache.hadoop.hbase.client.RegionInfo:A-java.lang.String-">checkLockPermissions(ObserverContext<?>, String, TableName, RegionInfo[], String)</a></span> - Method in class org.apache.hadoop.hbase.security.access.<a href="org/apache/hadoop/hbase/security/ac [...]
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<dd> </dd>
<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/PrivateCellUtil.FirstOnRowColByteBufferExtendedCell.html#colLength">colLength</a></span> - Variable in class org.apache.hadoop.hbase.<a href="org/apache/hadoop/hbase/PrivateCellUtil.FirstOnRowColByteBufferExtendedCell.html" title="class in org.apache.hadoop.hbase">PrivateCellUtil.FirstOnRowColByteBufferExtendedCell</a></dt>
<dd> </dd>
+<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/master/balancer/RegionReplicaHostCostFunction.html#colocatedReplicaCountsPerGroup">colocatedReplicaCountsPerGroup</a></span> - Variable in class org.apache.hadoop.hbase.master.balancer.<a href="org/apache/hadoop/hbase/master/balancer/RegionReplicaHostCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">RegionReplicaHostCostFunction</a></dt>
+<dd> </dd>
+<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html#colocatedReplicaCountsPerHost">colocatedReplicaCountsPerHost</a></span> - Variable in class org.apache.hadoop.hbase.master.balancer.<a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a></dt>
+<dd> </dd>
+<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html#colocatedReplicaCountsPerRack">colocatedReplicaCountsPerRack</a></span> - Variable in class org.apache.hadoop.hbase.master.balancer.<a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a></dt>
+<dd> </dd>
+<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html#colocatedReplicaCountsPerServer">colocatedReplicaCountsPerServer</a></span> - Variable in class org.apache.hadoop.hbase.master.balancer.<a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a></dt>
+<dd> </dd>
<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/PrivateCellUtil.FirstOnRowColByteBufferExtendedCell.html#colOffset">colOffset</a></span> - Variable in class org.apache.hadoop.hbase.<a href="org/apache/hadoop/hbase/PrivateCellUtil.FirstOnRowColByteBufferExtendedCell.html" title="class in org.apache.hadoop.hbase">PrivateCellUtil.FirstOnRowColByteBufferExtendedCell</a></dt>
<dd> </dd>
<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/filter/ParseConstants.html#COLON">COLON</a></span> - Static variable in class org.apache.hadoop.hbase.filter.<a href="org/apache/hadoop/hbase/filter/ParseConstants.html" title="class in org.apache.hadoop.hbase.filter">ParseConstants</a></dt>
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<dd> </dd>
<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.html#costlyOperationTimer">costlyOperationTimer</a></span> - Variable in class org.apache.hadoop.hbase.coprocessor.example.<a href="org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.html" title="class in org.apache.hadoop.hbase.coprocessor.example">ExampleRegionObserverWithMetrics</a></dt>
<dd> </dd>
-<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/master/balancer/RegionReplicaGroupingCostFunction.html#costPerGroup-int:A-">costPerGroup(int[])</a></span> - Method in class org.apache.hadoop.hbase.master.balancer.<a href="org/apache/hadoop/hbase/master/balancer/RegionReplicaGroupingCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">RegionReplicaGroupingCostFunction</a></dt>
+<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/master/balancer/RegionReplicaGroupingCostFunction.html#costPerGroup-org.agrona.collections.Int2IntCounterMap-">costPerGroup(Int2IntCounterMap)</a></span> - Method in class org.apache.hadoop.hbase.master.balancer.<a href="org/apache/hadoop/hbase/master/balancer/RegionReplicaGroupingCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">RegionReplicaGroupingCostFunction</a></dt>
<dd>
<div class="block">For each primary region, it computes the total number of replicas in the array (numReplicas)
and returns a sum of numReplicas-1 squared.</div>
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<dd> </dd>
<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/tool/CanaryTool.html#populateReadTableTimeoutsMap-java.lang.String-">populateReadTableTimeoutsMap(String)</a></span> - Method in class org.apache.hadoop.hbase.tool.<a href="org/apache/hadoop/hbase/tool/CanaryTool.html" title="class in org.apache.hadoop.hbase.tool">CanaryTool</a></dt>
<dd> </dd>
+<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html#populateRegionPerLocationFromServer-int:A:A-org.agrona.collections.Int2IntCounterMap:A-int:A:A-">populateRegionPerLocationFromServer(int[][], Int2IntCounterMap[], int[][])</a></span> - Method in class org.apache.hadoop.hbase.master.balancer.<a href="org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerCl [...]
+<dd> </dd>
<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/regionserver/RegionScannerImpl.html#populateResult-java.util.List-org.apache.hadoop.hbase.regionserver.KeyValueHeap-org.apache.hadoop.hbase.regionserver.ScannerContext-org.apache.hadoop.hbase.Cell-">populateResult(List<Cell>, KeyValueHeap, ScannerContext, Cell)</a></span> - Method in class org.apache.hadoop.hbase.regionserver.<a href="org/apache/hadoop/hbase/regionserver/RegionScannerImpl.html" title="class in org.ap [...]
<dd>
<div class="block">Fetches records with currentRow into results list, until next row, batchLimit (if not -1) is
@@ -93289,14 +93303,6 @@ service.</div>
</dd>
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+<span class="sourceLineNo">072</span> int[] serverIndexToRegionsOffset; // serverIndex -> offset of region list<a name="line.72"></a>
+<span class="sourceLineNo">073</span> int[][] regionsPerHost; // hostIndex -> list of regions<a name="line.73"></a>
+<span class="sourceLineNo">074</span> int[][] regionsPerRack; // rackIndex -> region list<a name="line.74"></a>
+<span class="sourceLineNo">075</span> Int2IntCounterMap[] colocatedReplicaCountsPerServer; // serverIndex -> counts of colocated<a name="line.75"></a>
+<span class="sourceLineNo">076</span> // replicas by primary region index<a name="line.76"></a>
+<span class="sourceLineNo">077</span> Int2IntCounterMap[] colocatedReplicaCountsPerHost; // hostIndex -> counts of colocated replicas by<a name="line.77"></a>
+<span class="sourceLineNo">078</span> // primary region index<a name="line.78"></a>
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+<span class="sourceLineNo">080</span> // primary region index<a name="line.80"></a>
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+<span class="sourceLineNo">083</span> int[][] serversPerRack; // rackIndex -> list of server indexes<a name="line.83"></a>
+<span class="sourceLineNo">084</span> int[] regionIndexToServerIndex; // regionIndex -> serverIndex<a name="line.84"></a>
+<span class="sourceLineNo">085</span> int[] initialRegionIndexToServerIndex; // regionIndex -> serverIndex (initial cluster state)<a name="line.85"></a>
+<span class="sourceLineNo">086</span> int[] regionIndexToTableIndex; // regionIndex -> tableIndex<a name="line.86"></a>
+<span class="sourceLineNo">087</span> int[][] numRegionsPerServerPerTable; // serverIndex -> tableIndex -> # regions<a name="line.87"></a>
+<span class="sourceLineNo">088</span> int[] numRegionsPerTable; // tableIndex -> region count<a name="line.88"></a>
+<span class="sourceLineNo">089</span> double[] meanRegionsPerTable; // mean region count per table<a name="line.89"></a>
+<span class="sourceLineNo">090</span> double[] regionSkewByTable; // skew on RS per by table<a name="line.90"></a>
+<span class="sourceLineNo">091</span> double[] minRegionSkewByTable; // min skew on RS per by table<a name="line.91"></a>
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerClusterState.LocalityType.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerClusterState.LocalityType.html
index 71d9218..d15cd10 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerClusterState.LocalityType.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerClusterState.LocalityType.html
@@ -34,859 +34,852 @@
<span class="sourceLineNo">026</span>import java.util.HashMap;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.List;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.Map;<a name="line.28"></a>
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-<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.ServerName;<a name="line.30"></a>
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-<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.net.Address;<a name="line.34"></a>
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-<span class="sourceLineNo">037</span>import org.slf4j.LoggerFactory;<a name="line.37"></a>
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+<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.ServerName;<a name="line.32"></a>
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+<span class="sourceLineNo">040</span><a name="line.40"></a>
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+<span class="sourceLineNo">061</span> ArrayList<String> tables;<a name="line.61"></a>
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+<span class="sourceLineNo">063</span> Deque<BalancerRegionLoad>[] regionLoads;<a name="line.63"></a>
+<span class="sourceLineNo">064</span> private RegionHDFSBlockLocationFinder regionFinder;<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
-<span class="sourceLineNo">066</span> int[] serverIndexToHostIndex; // serverIndex -> host index<a name="line.66"></a>
-<span class="sourceLineNo">067</span> int[] serverIndexToRackIndex; // serverIndex -> rack index<a name="line.67"></a>
-<span class="sourceLineNo">068</span><a name="line.68"></a>
-<span class="sourceLineNo">069</span> int[][] regionsPerServer; // serverIndex -> region list<a name="line.69"></a>
-<span class="sourceLineNo">070</span> int[] serverIndexToRegionsOffset; // serverIndex -> offset of region list<a name="line.70"></a>
-<span class="sourceLineNo">071</span> int[][] regionsPerHost; // hostIndex -> list of regions<a name="line.71"></a>
-<span class="sourceLineNo">072</span> int[][] regionsPerRack; // rackIndex -> region list<a name="line.72"></a>
-<span class="sourceLineNo">073</span> int[][] primariesOfRegionsPerServer; // serverIndex -> sorted list of regions by primary region<a name="line.73"></a>
-<span class="sourceLineNo">074</span> // index<a name="line.74"></a>
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-<span class="sourceLineNo">078</span> int[][] serversPerHost; // hostIndex -> list of server indexes<a name="line.78"></a>
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-<span class="sourceLineNo">080</span> int[] regionIndexToServerIndex; // regionIndex -> serverIndex<a name="line.80"></a>
-<span class="sourceLineNo">081</span> int[] initialRegionIndexToServerIndex; // regionIndex -> serverIndex (initial cluster state)<a name="line.81"></a>
-<span class="sourceLineNo">082</span> int[] regionIndexToTableIndex; // regionIndex -> tableIndex<a name="line.82"></a>
-<span class="sourceLineNo">083</span> int[][] numRegionsPerServerPerTable; // serverIndex -> tableIndex -> # regions<a name="line.83"></a>
-<span class="sourceLineNo">084</span> int[] numRegionsPerTable; // tableIndex -> region count<a name="line.84"></a>
-<span class="sourceLineNo">085</span> double[] meanRegionsPerTable; // mean region count per table<a name="line.85"></a>
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-<span class="sourceLineNo">087</span> double[] minRegionSkewByTable; // min skew on RS per by table<a name="line.87"></a>
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+<span class="sourceLineNo">556</span><a name="line.556"></a>
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+<span class="sourceLineNo">821</span> LOG.trace("Lowest locality region is " +<a name="line.821"></a>
+<span class="sourceLineNo">822</span> regions[regionsPerServer[serverIndex][lowestLocalityRegionIndex]]<a name="line.822"></a>
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html
index 71d9218..d15cd10 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html
@@ -34,859 +34,852 @@
<span class="sourceLineNo">026</span>import java.util.HashMap;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.List;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.Map;<a name="line.28"></a>
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-<span class="sourceLineNo">051</span> private static final Logger LOG = LoggerFactory.getLogger(BalancerClusterState.class);<a name="line.51"></a>
+<span class="sourceLineNo">029</span>import org.agrona.collections.Hashing;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.agrona.collections.Int2IntCounterMap;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HDFSBlocksDistribution;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.ServerName;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.33"></a>
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+<span class="sourceLineNo">037</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.37"></a>
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+<span class="sourceLineNo">040</span><a name="line.40"></a>
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+<span class="sourceLineNo">549</span> public int getRackForRegion(int region) {<a name="line.549"></a>
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+<span class="sourceLineNo">552</span><a name="line.552"></a>
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+<span class="sourceLineNo">556</span><a name="line.556"></a>
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaCandidateGenerator.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaCandidateGenerator.html
index 72f463d..7269114 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaCandidateGenerator.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaCandidateGenerator.html
@@ -27,89 +27,77 @@
<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.master.balancer;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.util.concurrent.ThreadLocalRandom;<a name="line.21"></a>
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-<span class="sourceLineNo">049</span> // ids for the regions hosted in server, a consecutive repetition means that replicas<a name="line.49"></a>
-<span class="sourceLineNo">050</span> // are co-hosted<a name="line.50"></a>
-<span class="sourceLineNo">051</span> for (int j = 0; j <= primariesOfRegionsPerGroup.length; j++) {<a name="line.51"></a>
-<span class="sourceLineNo">052</span> int primary = j < primariesOfRegionsPerGroup.length ? primariesOfRegionsPerGroup[j] : -1;<a name="line.52"></a>
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-<span class="sourceLineNo">054</span> int numReplicas = j - currentPrimaryIndex;<a name="line.54"></a>
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-<span class="sourceLineNo">056</span> // decide to select this primary region id or not<a name="line.56"></a>
-<span class="sourceLineNo">057</span> double currentRandom = ThreadLocalRandom.current().nextDouble();<a name="line.57"></a>
-<span class="sourceLineNo">058</span> // we don't know how many region replicas are co-hosted, we will randomly select one<a name="line.58"></a>
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-<span class="sourceLineNo">060</span> if (currentRandom > currentLargestRandom) {<a name="line.60"></a>
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-<span class="sourceLineNo">062</span> currentLargestRandom = currentRandom;<a name="line.62"></a>
-<span class="sourceLineNo">063</span> }<a name="line.63"></a>
-<span class="sourceLineNo">064</span> }<a name="line.64"></a>
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-<span class="sourceLineNo">066</span> currentPrimaryIndex = j;<a name="line.66"></a>
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-<span class="sourceLineNo">070</span> // we have found the primary id for the region to move. Now find the actual regionIndex<a name="line.70"></a>
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-<span class="sourceLineNo">072</span> for (int regionIndex : regionsPerGroup) {<a name="line.72"></a>
-<span class="sourceLineNo">073</span> if (selectedPrimaryIndex == regionIndexToPrimaryIndex[regionIndex]) {<a name="line.73"></a>
-<span class="sourceLineNo">074</span> // always move the secondary, not the primary<a name="line.74"></a>
-<span class="sourceLineNo">075</span> if (selectedPrimaryIndex != regionIndex) {<a name="line.75"></a>
-<span class="sourceLineNo">076</span> return regionIndex;<a name="line.76"></a>
-<span class="sourceLineNo">077</span> }<a name="line.77"></a>
-<span class="sourceLineNo">078</span> }<a name="line.78"></a>
-<span class="sourceLineNo">079</span> }<a name="line.79"></a>
-<span class="sourceLineNo">080</span> return -1;<a name="line.80"></a>
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-<span class="sourceLineNo">084</span> BalanceAction generate(BalancerClusterState cluster) {<a name="line.84"></a>
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-<span class="sourceLineNo">086</span> if (cluster.numServers <= 1 || serverIndex == -1) {<a name="line.86"></a>
-<span class="sourceLineNo">087</span> return BalanceAction.NULL_ACTION;<a name="line.87"></a>
-<span class="sourceLineNo">088</span> }<a name="line.88"></a>
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-<span class="sourceLineNo">090</span> int regionIndex = selectCoHostedRegionPerGroup(cluster.primariesOfRegionsPerServer[serverIndex],<a name="line.90"></a>
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-<span class="sourceLineNo">092</span><a name="line.92"></a>
-<span class="sourceLineNo">093</span> // if there are no pairs of region replicas co-hosted, default to random generator<a name="line.93"></a>
-<span class="sourceLineNo">094</span> if (regionIndex == -1) {<a name="line.94"></a>
-<span class="sourceLineNo">095</span> // default to randompicker<a name="line.95"></a>
-<span class="sourceLineNo">096</span> return randomGenerator.generate(cluster);<a name="line.96"></a>
-<span class="sourceLineNo">097</span> }<a name="line.97"></a>
-<span class="sourceLineNo">098</span><a name="line.98"></a>
-<span class="sourceLineNo">099</span> int toServerIndex = pickOtherRandomServer(cluster, serverIndex);<a name="line.99"></a>
-<span class="sourceLineNo">100</span> int toRegionIndex = pickRandomRegion(cluster, toServerIndex, 0.9f);<a name="line.100"></a>
-<span class="sourceLineNo">101</span> return getAction(serverIndex, regionIndex, toServerIndex, toRegionIndex);<a name="line.101"></a>
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-<span class="sourceLineNo">103</span><a name="line.103"></a>
-<span class="sourceLineNo">104</span>}<a name="line.104"></a>
+<span class="sourceLineNo">022</span><a name="line.22"></a>
+<span class="sourceLineNo">023</span>import org.agrona.collections.Int2IntCounterMap;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import org.agrona.collections.IntArrayList;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.25"></a>
+<span class="sourceLineNo">026</span><a name="line.26"></a>
+<span class="sourceLineNo">027</span>/**<a name="line.27"></a>
+<span class="sourceLineNo">028</span> * Generates candidates which moves the replicas out of the region server for co-hosted region<a name="line.28"></a>
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+<span class="sourceLineNo">030</span> */<a name="line.30"></a>
+<span class="sourceLineNo">031</span>@InterfaceAudience.Private<a name="line.31"></a>
+<span class="sourceLineNo">032</span>class RegionReplicaCandidateGenerator extends CandidateGenerator {<a name="line.32"></a>
+<span class="sourceLineNo">033</span><a name="line.33"></a>
+<span class="sourceLineNo">034</span> protected final RandomCandidateGenerator randomGenerator = new RandomCandidateGenerator();<a name="line.34"></a>
+<span class="sourceLineNo">035</span><a name="line.35"></a>
+<span class="sourceLineNo">036</span> /**<a name="line.36"></a>
+<span class="sourceLineNo">037</span> * Randomly select one regionIndex out of all region replicas co-hosted in the same group (a group<a name="line.37"></a>
+<span class="sourceLineNo">038</span> * is a server, host or rack)<a name="line.38"></a>
+<span class="sourceLineNo">039</span> * @param colocatedReplicaCountsPerGroup either Cluster.colocatedReplicaCountsPerServer,<a name="line.39"></a>
+<span class="sourceLineNo">040</span> * colocatedReplicaCountsPerHost or colocatedReplicaCountsPerRack<a name="line.40"></a>
+<span class="sourceLineNo">041</span> * @param regionsPerGroup either Cluster.regionsPerServer, regionsPerHost or regionsPerRack<a name="line.41"></a>
+<span class="sourceLineNo">042</span> * @param regionIndexToPrimaryIndex Cluster.regionsIndexToPrimaryIndex<a name="line.42"></a>
+<span class="sourceLineNo">043</span> * @return a regionIndex for the selected primary or -1 if there is no co-locating<a name="line.43"></a>
+<span class="sourceLineNo">044</span> */<a name="line.44"></a>
+<span class="sourceLineNo">045</span> int selectCoHostedRegionPerGroup(Int2IntCounterMap colocatedReplicaCountsPerGroup,<a name="line.45"></a>
+<span class="sourceLineNo">046</span> int[] regionsPerGroup, int[] regionIndexToPrimaryIndex) {<a name="line.46"></a>
+<span class="sourceLineNo">047</span> final IntArrayList colocated = new IntArrayList(colocatedReplicaCountsPerGroup.size(), -1);<a name="line.47"></a>
+<span class="sourceLineNo">048</span> colocatedReplicaCountsPerGroup.forEach((primary, count) -> {<a name="line.48"></a>
+<span class="sourceLineNo">049</span> if (count > 1) { // means consecutive primaries, indicating co-location<a name="line.49"></a>
+<span class="sourceLineNo">050</span> colocated.add(primary);<a name="line.50"></a>
+<span class="sourceLineNo">051</span> }<a name="line.51"></a>
+<span class="sourceLineNo">052</span> });<a name="line.52"></a>
+<span class="sourceLineNo">053</span><a name="line.53"></a>
+<span class="sourceLineNo">054</span> if (!colocated.isEmpty()) {<a name="line.54"></a>
+<span class="sourceLineNo">055</span> int rand = ThreadLocalRandom.current().nextInt(colocated.size());<a name="line.55"></a>
+<span class="sourceLineNo">056</span> int selectedPrimaryIndex = colocated.get(rand);<a name="line.56"></a>
+<span class="sourceLineNo">057</span> // we have found the primary id for the region to move. Now find the actual regionIndex<a name="line.57"></a>
+<span class="sourceLineNo">058</span> // with the given primary, prefer to move the secondary region.<a name="line.58"></a>
+<span class="sourceLineNo">059</span> for (int regionIndex : regionsPerGroup) {<a name="line.59"></a>
+<span class="sourceLineNo">060</span> if (selectedPrimaryIndex == regionIndexToPrimaryIndex[regionIndex]) {<a name="line.60"></a>
+<span class="sourceLineNo">061</span> // always move the secondary, not the primary<a name="line.61"></a>
+<span class="sourceLineNo">062</span> if (selectedPrimaryIndex != regionIndex) {<a name="line.62"></a>
+<span class="sourceLineNo">063</span> return regionIndex;<a name="line.63"></a>
+<span class="sourceLineNo">064</span> }<a name="line.64"></a>
+<span class="sourceLineNo">065</span> }<a name="line.65"></a>
+<span class="sourceLineNo">066</span> }<a name="line.66"></a>
+<span class="sourceLineNo">067</span> }<a name="line.67"></a>
+<span class="sourceLineNo">068</span> return -1;<a name="line.68"></a>
+<span class="sourceLineNo">069</span> }<a name="line.69"></a>
+<span class="sourceLineNo">070</span><a name="line.70"></a>
+<span class="sourceLineNo">071</span> @Override<a name="line.71"></a>
+<span class="sourceLineNo">072</span> BalanceAction generate(BalancerClusterState cluster) {<a name="line.72"></a>
+<span class="sourceLineNo">073</span> int serverIndex = pickRandomServer(cluster);<a name="line.73"></a>
+<span class="sourceLineNo">074</span> if (cluster.numServers <= 1 || serverIndex == -1) {<a name="line.74"></a>
+<span class="sourceLineNo">075</span> return BalanceAction.NULL_ACTION;<a name="line.75"></a>
+<span class="sourceLineNo">076</span> }<a name="line.76"></a>
+<span class="sourceLineNo">077</span><a name="line.77"></a>
+<span class="sourceLineNo">078</span> int regionIndex = selectCoHostedRegionPerGroup(<a name="line.78"></a>
+<span class="sourceLineNo">079</span> cluster.colocatedReplicaCountsPerServer[serverIndex],<a name="line.79"></a>
+<span class="sourceLineNo">080</span> cluster.regionsPerServer[serverIndex], cluster.regionIndexToPrimaryIndex);<a name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span> // if there are no pairs of region replicas co-hosted, default to random generator<a name="line.82"></a>
+<span class="sourceLineNo">083</span> if (regionIndex == -1) {<a name="line.83"></a>
+<span class="sourceLineNo">084</span> // default to randompicker<a name="line.84"></a>
+<span class="sourceLineNo">085</span> return randomGenerator.generate(cluster);<a name="line.85"></a>
+<span class="sourceLineNo">086</span> }<a name="line.86"></a>
+<span class="sourceLineNo">087</span><a name="line.87"></a>
+<span class="sourceLineNo">088</span> int toServerIndex = pickOtherRandomServer(cluster, serverIndex);<a name="line.88"></a>
+<span class="sourceLineNo">089</span> int toRegionIndex = pickRandomRegion(cluster, toServerIndex, 0.9f);<a name="line.89"></a>
+<span class="sourceLineNo">090</span> return getAction(serverIndex, regionIndex, toServerIndex, toRegionIndex);<a name="line.90"></a>
+<span class="sourceLineNo">091</span> }<a name="line.91"></a>
+<span class="sourceLineNo">092</span>}<a name="line.92"></a>
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaGroupingCostFunction.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaGroupingCostFunction.html
index 1a1da3a..d31213f 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaGroupingCostFunction.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaGroupingCostFunction.html
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<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.master.balancer;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
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+<span class="sourceLineNo">026</span><a name="line.26"></a>
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+<span class="sourceLineNo">031</span> */<a name="line.31"></a>
+<span class="sourceLineNo">032</span>@InterfaceAudience.Private<a name="line.32"></a>
+<span class="sourceLineNo">033</span>abstract class RegionReplicaGroupingCostFunction extends CostFunction {<a name="line.33"></a>
+<span class="sourceLineNo">034</span> protected long maxCost = 0;<a name="line.34"></a>
+<span class="sourceLineNo">035</span> protected long[] costsPerGroup; // group is either server, host or rack<a name="line.35"></a>
+<span class="sourceLineNo">036</span><a name="line.36"></a>
+<span class="sourceLineNo">037</span> @Override<a name="line.37"></a>
+<span class="sourceLineNo">038</span> final void prepare(BalancerClusterState cluster) {<a name="line.38"></a>
+<span class="sourceLineNo">039</span> super.prepare(cluster);<a name="line.39"></a>
+<span class="sourceLineNo">040</span> if (!isNeeded()) {<a name="line.40"></a>
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+<span class="sourceLineNo">043</span> loadCosts();<a name="line.43"></a>
+<span class="sourceLineNo">044</span> }<a name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span> protected abstract void loadCosts();<a name="line.46"></a>
+<span class="sourceLineNo">047</span><a name="line.47"></a>
+<span class="sourceLineNo">048</span> protected final long getMaxCost(BalancerClusterState cluster) {<a name="line.48"></a>
+<span class="sourceLineNo">049</span> // max cost is the case where every region replica is hosted together regardless of host<a name="line.49"></a>
+<span class="sourceLineNo">050</span> Int2IntCounterMap colocatedReplicaCounts = new Int2IntCounterMap(cluster.numRegions,<a name="line.50"></a>
+<span class="sourceLineNo">051</span> Hashing.DEFAULT_LOAD_FACTOR, 0);<a name="line.51"></a>
+<span class="sourceLineNo">052</span> for (int i = 0; i < cluster.regionIndexToPrimaryIndex.length; i++) {<a name="line.52"></a>
+<span class="sourceLineNo">053</span> colocatedReplicaCounts.getAndIncrement(cluster.regionIndexToPrimaryIndex[i]);<a name="line.53"></a>
+<span class="sourceLineNo">054</span> }<a name="line.54"></a>
+<span class="sourceLineNo">055</span> // compute numReplicas from the sorted array<a name="line.55"></a>
+<span class="sourceLineNo">056</span> return costPerGroup(colocatedReplicaCounts);<a name="line.56"></a>
+<span class="sourceLineNo">057</span> }<a name="line.57"></a>
+<span class="sourceLineNo">058</span><a name="line.58"></a>
+<span class="sourceLineNo">059</span> @Override<a name="line.59"></a>
+<span class="sourceLineNo">060</span> boolean isNeeded() {<a name="line.60"></a>
+<span class="sourceLineNo">061</span> return cluster.hasRegionReplicas;<a name="line.61"></a>
+<span class="sourceLineNo">062</span> }<a name="line.62"></a>
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+<span class="sourceLineNo">064</span> @Override<a name="line.64"></a>
+<span class="sourceLineNo">065</span> protected double cost() {<a name="line.65"></a>
+<span class="sourceLineNo">066</span> if (maxCost <= 0) {<a name="line.66"></a>
+<span class="sourceLineNo">067</span> return 0;<a name="line.67"></a>
+<span class="sourceLineNo">068</span> }<a name="line.68"></a>
+<span class="sourceLineNo">069</span><a name="line.69"></a>
+<span class="sourceLineNo">070</span> long totalCost = 0;<a name="line.70"></a>
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+<span class="sourceLineNo">072</span> totalCost += costsPerGroup[i];<a name="line.72"></a>
+<span class="sourceLineNo">073</span> }<a name="line.73"></a>
+<span class="sourceLineNo">074</span> return scale(0, maxCost, totalCost);<a name="line.74"></a>
+<span class="sourceLineNo">075</span> }<a name="line.75"></a>
+<span class="sourceLineNo">076</span><a name="line.76"></a>
+<span class="sourceLineNo">077</span> /**<a name="line.77"></a>
+<span class="sourceLineNo">078</span> * For each primary region, it computes the total number of replicas in the array (numReplicas)<a name="line.78"></a>
+<span class="sourceLineNo">079</span> * and returns a sum of numReplicas-1 squared. For example, if the server hosts regions a, b, c,<a name="line.79"></a>
+<span class="sourceLineNo">080</span> * d, e, f where a and b are same replicas, and c,d,e are same replicas, it returns (2-1) * (2-1)<a name="line.80"></a>
+<span class="sourceLineNo">081</span> * + (3-1) * (3-1) + (1-1) * (1-1).<a name="line.81"></a>
+<span class="sourceLineNo">082</span> * @param colocatedReplicaCounts a sorted array of primary regions ids for the regions hosted<a name="line.82"></a>
+<span class="sourceLineNo">083</span> * @return a sum of numReplicas-1 squared for each primary region in the group.<a name="line.83"></a>
+<span class="sourceLineNo">084</span> */<a name="line.84"></a>
+<span class="sourceLineNo">085</span> protected final long costPerGroup(Int2IntCounterMap colocatedReplicaCounts) {<a name="line.85"></a>
+<span class="sourceLineNo">086</span> final AtomicLong cost = new AtomicLong(0);<a name="line.86"></a>
+<span class="sourceLineNo">087</span> // colocatedReplicaCounts is a sorted array of primary ids of regions. Replicas of regions<a name="line.87"></a>
<span class="sourceLineNo">088</span> // sharing the same primary will have consecutive numbers in the array.<a name="line.88"></a>
-<span class="sourceLineNo">089</span> for (int j = 0; j <= primariesOfRegions.length; j++) {<a name="line.89"></a>
-<span class="sourceLineNo">090</span> int primary = j < primariesOfRegions.length ? primariesOfRegions[j] : -1;<a name="line.90"></a>
-<span class="sourceLineNo">091</span> if (primary != currentPrimary) { // we see a new primary<a name="line.91"></a>
-<span class="sourceLineNo">092</span> int numReplicas = j - currentPrimaryIndex;<a name="line.92"></a>
-<span class="sourceLineNo">093</span> // square the cost<a name="line.93"></a>
-<span class="sourceLineNo">094</span> if (numReplicas > 1) { // means consecutive primaries, indicating co-location<a name="line.94"></a>
-<span class="sourceLineNo">095</span> cost += (numReplicas - 1) * (numReplicas - 1);<a name="line.95"></a>
-<span class="sourceLineNo">096</span> }<a name="line.96"></a>
-<span class="sourceLineNo">097</span> currentPrimary = primary;<a name="line.97"></a>
-<span class="sourceLineNo">098</span> currentPrimaryIndex = j;<a name="line.98"></a>
-<span class="sourceLineNo">099</span> }<a name="line.99"></a>
-<span class="sourceLineNo">100</span> }<a name="line.100"></a>
-<span class="sourceLineNo">101</span><a name="line.101"></a>
-<span class="sourceLineNo">102</span> return cost;<a name="line.102"></a>
-<span class="sourceLineNo">103</span> }<a name="line.103"></a>
-<span class="sourceLineNo">104</span>}<a name="line.104"></a>
+<span class="sourceLineNo">089</span> colocatedReplicaCounts.forEach((primary,count) -> {<a name="line.89"></a>
+<span class="sourceLineNo">090</span> if (count > 1) { // means consecutive primaries, indicating co-location<a name="line.90"></a>
+<span class="sourceLineNo">091</span> cost.getAndAdd((count - 1) * (count - 1));<a name="line.91"></a>
+<span class="sourceLineNo">092</span> }<a name="line.92"></a>
+<span class="sourceLineNo">093</span> });<a name="line.93"></a>
+<span class="sourceLineNo">094</span> return cost.longValue();<a name="line.94"></a>
+<span class="sourceLineNo">095</span> }<a name="line.95"></a>
+<span class="sourceLineNo">096</span>}<a name="line.96"></a>
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaHostCostFunction.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaHostCostFunction.html
index 4c7e285..17fbbf4 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaHostCostFunction.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaHostCostFunction.html
@@ -25,58 +25,60 @@
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.master.balancer;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
-<span class="sourceLineNo">020</span>import org.apache.hadoop.conf.Configuration;<a name="line.20"></a>
-<span class="sourceLineNo">021</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.21"></a>
-<span class="sourceLineNo">022</span><a name="line.22"></a>
-<span class="sourceLineNo">023</span>/**<a name="line.23"></a>
-<span class="sourceLineNo">024</span> * A cost function for region replicas. We give a very high cost to hosting replicas of the same<a name="line.24"></a>
-<span class="sourceLineNo">025</span> * region in the same host. We do not prevent the case though, since if numReplicas ><a name="line.25"></a>
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-<span class="sourceLineNo">027</span> */<a name="line.27"></a>
-<span class="sourceLineNo">028</span>@InterfaceAudience.Private<a name="line.28"></a>
-<span class="sourceLineNo">029</span>class RegionReplicaHostCostFunction extends RegionReplicaGroupingCostFunction {<a name="line.29"></a>
-<span class="sourceLineNo">030</span><a name="line.30"></a>
-<span class="sourceLineNo">031</span> private static final String REGION_REPLICA_HOST_COST_KEY =<a name="line.31"></a>
-<span class="sourceLineNo">032</span> "hbase.master.balancer.stochastic.regionReplicaHostCostKey";<a name="line.32"></a>
-<span class="sourceLineNo">033</span> private static final float DEFAULT_REGION_REPLICA_HOST_COST_KEY = 100000;<a name="line.33"></a>
-<span class="sourceLineNo">034</span><a name="line.34"></a>
-<span class="sourceLineNo">035</span> private int[][] primariesOfRegionsPerGroup;<a name="line.35"></a>
-<span class="sourceLineNo">036</span><a name="line.36"></a>
-<span class="sourceLineNo">037</span> public RegionReplicaHostCostFunction(Configuration conf) {<a name="line.37"></a>
-<span class="sourceLineNo">038</span> this.setMultiplier(<a name="line.38"></a>
-<span class="sourceLineNo">039</span> conf.getFloat(REGION_REPLICA_HOST_COST_KEY, DEFAULT_REGION_REPLICA_HOST_COST_KEY));<a name="line.39"></a>
-<span class="sourceLineNo">040</span> }<a name="line.40"></a>
-<span class="sourceLineNo">041</span><a name="line.41"></a>
-<span class="sourceLineNo">042</span> @Override<a name="line.42"></a>
-<span class="sourceLineNo">043</span> protected void loadCosts() {<a name="line.43"></a>
-<span class="sourceLineNo">044</span> // max cost is the case where every region replica is hosted together regardless of host<a name="line.44"></a>
-<span class="sourceLineNo">045</span> maxCost = cluster.numHosts > 1 ? getMaxCost(cluster) : 0;<a name="line.45"></a>
-<span class="sourceLineNo">046</span> costsPerGroup = new long[cluster.numHosts];<a name="line.46"></a>
-<span class="sourceLineNo">047</span> primariesOfRegionsPerGroup = cluster.multiServersPerHost // either server based or host based<a name="line.47"></a>
-<span class="sourceLineNo">048</span> ? cluster.primariesOfRegionsPerHost : cluster.primariesOfRegionsPerServer;<a name="line.48"></a>
-<span class="sourceLineNo">049</span> for (int i = 0; i < primariesOfRegionsPerGroup.length; i++) {<a name="line.49"></a>
-<span class="sourceLineNo">050</span> costsPerGroup[i] = costPerGroup(primariesOfRegionsPerGroup[i]);<a name="line.50"></a>
-<span class="sourceLineNo">051</span> }<a name="line.51"></a>
-<span class="sourceLineNo">052</span> }<a name="line.52"></a>
-<span class="sourceLineNo">053</span><a name="line.53"></a>
-<span class="sourceLineNo">054</span> @Override<a name="line.54"></a>
-<span class="sourceLineNo">055</span> protected void regionMoved(int region, int oldServer, int newServer) {<a name="line.55"></a>
-<span class="sourceLineNo">056</span> if (maxCost <= 0) {<a name="line.56"></a>
-<span class="sourceLineNo">057</span> return; // no need to compute<a name="line.57"></a>
-<span class="sourceLineNo">058</span> }<a name="line.58"></a>
-<span class="sourceLineNo">059</span> if (cluster.multiServersPerHost) {<a name="line.59"></a>
-<span class="sourceLineNo">060</span> int oldHost = cluster.serverIndexToHostIndex[oldServer];<a name="line.60"></a>
-<span class="sourceLineNo">061</span> int newHost = cluster.serverIndexToHostIndex[newServer];<a name="line.61"></a>
-<span class="sourceLineNo">062</span> if (newHost != oldHost) {<a name="line.62"></a>
-<span class="sourceLineNo">063</span> costsPerGroup[oldHost] = costPerGroup(cluster.primariesOfRegionsPerHost[oldHost]);<a name="line.63"></a>
-<span class="sourceLineNo">064</span> costsPerGroup[newHost] = costPerGroup(cluster.primariesOfRegionsPerHost[newHost]);<a name="line.64"></a>
-<span class="sourceLineNo">065</span> }<a name="line.65"></a>
-<span class="sourceLineNo">066</span> } else {<a name="line.66"></a>
-<span class="sourceLineNo">067</span> costsPerGroup[oldServer] = costPerGroup(cluster.primariesOfRegionsPerServer[oldServer]);<a name="line.67"></a>
-<span class="sourceLineNo">068</span> costsPerGroup[newServer] = costPerGroup(cluster.primariesOfRegionsPerServer[newServer]);<a name="line.68"></a>
-<span class="sourceLineNo">069</span> }<a name="line.69"></a>
-<span class="sourceLineNo">070</span> }<a name="line.70"></a>
-<span class="sourceLineNo">071</span>}<a name="line.71"></a>
+<span class="sourceLineNo">020</span>import org.agrona.collections.Int2IntCounterMap;<a name="line.20"></a>
+<span class="sourceLineNo">021</span>import org.apache.hadoop.conf.Configuration;<a name="line.21"></a>
+<span class="sourceLineNo">022</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.22"></a>
+<span class="sourceLineNo">023</span><a name="line.23"></a>
+<span class="sourceLineNo">024</span>/**<a name="line.24"></a>
+<span class="sourceLineNo">025</span> * A cost function for region replicas. We give a very high cost to hosting replicas of the same<a name="line.25"></a>
+<span class="sourceLineNo">026</span> * region in the same host. We do not prevent the case though, since if numReplicas ><a name="line.26"></a>
+<span class="sourceLineNo">027</span> * numRegionServers, we still want to keep the replica open.<a name="line.27"></a>
+<span class="sourceLineNo">028</span> */<a name="line.28"></a>
+<span class="sourceLineNo">029</span>@InterfaceAudience.Private<a name="line.29"></a>
+<span class="sourceLineNo">030</span>class RegionReplicaHostCostFunction extends RegionReplicaGroupingCostFunction {<a name="line.30"></a>
+<span class="sourceLineNo">031</span><a name="line.31"></a>
+<span class="sourceLineNo">032</span> private static final String REGION_REPLICA_HOST_COST_KEY =<a name="line.32"></a>
+<span class="sourceLineNo">033</span> "hbase.master.balancer.stochastic.regionReplicaHostCostKey";<a name="line.33"></a>
+<span class="sourceLineNo">034</span> private static final float DEFAULT_REGION_REPLICA_HOST_COST_KEY = 100000;<a name="line.34"></a>
+<span class="sourceLineNo">035</span><a name="line.35"></a>
+<span class="sourceLineNo">036</span> private Int2IntCounterMap[] colocatedReplicaCountsPerGroup;<a name="line.36"></a>
+<span class="sourceLineNo">037</span><a name="line.37"></a>
+<span class="sourceLineNo">038</span> public RegionReplicaHostCostFunction(Configuration conf) {<a name="line.38"></a>
+<span class="sourceLineNo">039</span> this.setMultiplier(<a name="line.39"></a>
+<span class="sourceLineNo">040</span> conf.getFloat(REGION_REPLICA_HOST_COST_KEY, DEFAULT_REGION_REPLICA_HOST_COST_KEY));<a name="line.40"></a>
+<span class="sourceLineNo">041</span> }<a name="line.41"></a>
+<span class="sourceLineNo">042</span><a name="line.42"></a>
+<span class="sourceLineNo">043</span> @Override<a name="line.43"></a>
+<span class="sourceLineNo">044</span> protected void loadCosts() {<a name="line.44"></a>
+<span class="sourceLineNo">045</span> // max cost is the case where every region replica is hosted together regardless of host<a name="line.45"></a>
+<span class="sourceLineNo">046</span> maxCost = cluster.numHosts > 1 ? getMaxCost(cluster) : 0;<a name="line.46"></a>
+<span class="sourceLineNo">047</span> costsPerGroup = new long[cluster.numHosts];<a name="line.47"></a>
+<span class="sourceLineNo">048</span> // either server based or host based<a name="line.48"></a>
+<span class="sourceLineNo">049</span> colocatedReplicaCountsPerGroup = cluster.multiServersPerHost<a name="line.49"></a>
+<span class="sourceLineNo">050</span> ? cluster.colocatedReplicaCountsPerHost : cluster.colocatedReplicaCountsPerServer;<a name="line.50"></a>
+<span class="sourceLineNo">051</span> for (int i = 0; i < colocatedReplicaCountsPerGroup.length; i++) {<a name="line.51"></a>
+<span class="sourceLineNo">052</span> costsPerGroup[i] = costPerGroup(colocatedReplicaCountsPerGroup[i]);<a name="line.52"></a>
+<span class="sourceLineNo">053</span> }<a name="line.53"></a>
+<span class="sourceLineNo">054</span> }<a name="line.54"></a>
+<span class="sourceLineNo">055</span><a name="line.55"></a>
+<span class="sourceLineNo">056</span> @Override<a name="line.56"></a>
+<span class="sourceLineNo">057</span> protected void regionMoved(int region, int oldServer, int newServer) {<a name="line.57"></a>
+<span class="sourceLineNo">058</span> if (maxCost <= 0) {<a name="line.58"></a>
+<span class="sourceLineNo">059</span> return; // no need to compute<a name="line.59"></a>
+<span class="sourceLineNo">060</span> }<a name="line.60"></a>
+<span class="sourceLineNo">061</span> if (cluster.multiServersPerHost) {<a name="line.61"></a>
+<span class="sourceLineNo">062</span> int oldHost = cluster.serverIndexToHostIndex[oldServer];<a name="line.62"></a>
+<span class="sourceLineNo">063</span> int newHost = cluster.serverIndexToHostIndex[newServer];<a name="line.63"></a>
+<span class="sourceLineNo">064</span> if (newHost != oldHost) {<a name="line.64"></a>
+<span class="sourceLineNo">065</span> costsPerGroup[oldHost] = costPerGroup(cluster.colocatedReplicaCountsPerHost[oldHost]);<a name="line.65"></a>
+<span class="sourceLineNo">066</span> costsPerGroup[newHost] = costPerGroup(cluster.colocatedReplicaCountsPerHost[newHost]);<a name="line.66"></a>
+<span class="sourceLineNo">067</span> }<a name="line.67"></a>
+<span class="sourceLineNo">068</span> } else {<a name="line.68"></a>
+<span class="sourceLineNo">069</span> costsPerGroup[oldServer] = costPerGroup(cluster.colocatedReplicaCountsPerServer[oldServer]);<a name="line.69"></a>
+<span class="sourceLineNo">070</span> costsPerGroup[newServer] = costPerGroup(cluster.colocatedReplicaCountsPerServer[newServer]);<a name="line.70"></a>
+<span class="sourceLineNo">071</span> }<a name="line.71"></a>
+<span class="sourceLineNo">072</span> }<a name="line.72"></a>
+<span class="sourceLineNo">073</span>}<a name="line.73"></a>
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaRackCandidateGenerator.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaRackCandidateGenerator.html
index 38f4646..ec0d4ef 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaRackCandidateGenerator.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaRackCandidateGenerator.html
@@ -41,7 +41,7 @@
<span class="sourceLineNo">033</span> return super.generate(cluster);<a name="line.33"></a>
<span class="sourceLineNo">034</span> }<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
-<span class="sourceLineNo">036</span> int regionIndex = selectCoHostedRegionPerGroup(cluster.primariesOfRegionsPerRack[rackIndex],<a name="line.36"></a>
+<span class="sourceLineNo">036</span> int regionIndex = selectCoHostedRegionPerGroup(cluster.colocatedReplicaCountsPerRack[rackIndex],<a name="line.36"></a>
<span class="sourceLineNo">037</span> cluster.regionsPerRack[rackIndex], cluster.regionIndexToPrimaryIndex);<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span> // if there are no pairs of region replicas co-hosted, default to random generator<a name="line.39"></a>
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaRackCostFunction.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaRackCostFunction.html
index 508aefa..9c86e09 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaRackCostFunction.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/RegionReplicaRackCostFunction.html
@@ -53,8 +53,8 @@
<span class="sourceLineNo">045</span> // max cost is the case where every region replica is hosted together regardless of rack<a name="line.45"></a>
<span class="sourceLineNo">046</span> maxCost = getMaxCost(cluster);<a name="line.46"></a>
<span class="sourceLineNo">047</span> costsPerGroup = new long[cluster.numRacks];<a name="line.47"></a>
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-<span class="sourceLineNo">049</span> costsPerGroup[i] = costPerGroup(cluster.primariesOfRegionsPerRack[i]);<a name="line.49"></a>
+<span class="sourceLineNo">048</span> for (int i = 0; i < cluster.colocatedReplicaCountsPerRack.length; i++) {<a name="line.48"></a>
+<span class="sourceLineNo">049</span> costsPerGroup[i] = costPerGroup(cluster.colocatedReplicaCountsPerRack[i]);<a name="line.49"></a>
<span class="sourceLineNo">050</span> }<a name="line.50"></a>
<span class="sourceLineNo">051</span> }<a name="line.51"></a>
<span class="sourceLineNo">052</span><a name="line.52"></a>
@@ -66,8 +66,8 @@
<span class="sourceLineNo">058</span> int oldRack = cluster.serverIndexToRackIndex[oldServer];<a name="line.58"></a>
<span class="sourceLineNo">059</span> int newRack = cluster.serverIndexToRackIndex[newServer];<a name="line.59"></a>
<span class="sourceLineNo">060</span> if (newRack != oldRack) {<a name="line.60"></a>
-<span class="sourceLineNo">061</span> costsPerGroup[oldRack] = costPerGroup(cluster.primariesOfRegionsPerRack[oldRack]);<a name="line.61"></a>
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<a href="https://www.apache.org/">The Apache Software Foundation</a>.
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+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
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<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
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<a href="https://www.apache.org/">The Apache Software Foundation</a>.
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+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
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+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
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<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
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<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
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<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
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<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-22</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
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<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
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+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
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<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
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<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
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+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
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<p>Copyright ©2007–2021
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
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<a href="https://www.apache.org/">The Apache Software Foundation</a>.
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<p>Copyright ©2007–2021
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+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
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+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
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+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
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+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2021-09-25</li>
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