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+<li><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.SplitWorkerAssigner.html" title="class in org.apache.hadoop.hbase.master"><span class="typeNameLink">Next Class</span></a></li>
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+<ul class="subNavList">
+<li>Summary: </li>
+<li><a href="#nested.class.summary">Nested</a> | </li>
+<li><a href="#field.summary">Field</a> | </li>
+<li><a href="#constructor.summary">Constr</a> | </li>
+<li><a href="#method.summary">Method</a></li>
+</ul>
+<ul class="subNavList">
+<li>Detail: </li>
+<li><a href="#field.detail">Field</a> | </li>
+<li><a href="#constructor.detail">Constr</a> | </li>
+<li><a href="#method.detail">Method</a></li>
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+<div class="header">
+<div class="subTitle">org.apache.hadoop.hbase.master</div>
+<h2 title="Class SplitWALManager" class="title">Class SplitWALManager</h2>
+</div>
+<div class="contentContainer">
+<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>
+<ul class="inheritance">
+<li>org.apache.hadoop.hbase.master.SplitWALManager</li>
+</ul>
+</li>
+</ul>
+<div class="description">
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+<br>
+<pre>@InterfaceAudience.Private
+public class <a href="../../../../../src-html/org/apache/hadoop/hbase/master/SplitWALManager.html#line.72">SplitWALManager</a>
+extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
+<div class="block">Create <a href="../../../../../org/apache/hadoop/hbase/master/procedure/SplitWALProcedure.html" title="class in org.apache.hadoop.hbase.master.procedure"><code>SplitWALProcedure</code></a> for each WAL which need to split. Manage the workers for each
+ <a href="../../../../../org/apache/hadoop/hbase/master/procedure/SplitWALProcedure.html" title="class in org.apache.hadoop.hbase.master.procedure"><code>SplitWALProcedure</code></a>.
+ Total number of workers is (number of online servers) * (HBASE_SPLIT_WAL_MAX_SPLITTER).
+ Helps assign and release workers for split tasks.
+ Provide helper method to delete split WAL file and directory.
+
+ The user can get the SplitWALProcedures via splitWALs(crashedServer, splitMeta)
+ can get the files that need to split via getWALsToSplit(crashedServer, splitMeta)
+ can delete the splitting WAL and directory via deleteSplitWAL(wal)
+ and deleteSplitWAL(crashedServer)
+ can check if splitting WALs of a crashed server is success via isSplitWALFinished(walPath)
+ can acquire and release a worker for splitting WAL via acquireSplitWALWorker(procedure)
+ and releaseSplitWALWorker(worker, scheduler)
+
+ This class is to replace the zk-based WAL splitting related code, <a href="../../../../../org/apache/hadoop/hbase/master/MasterWalManager.html" title="class in org.apache.hadoop.hbase.master"><code>MasterWalManager</code></a>,
+ <a href="../../../../../org/apache/hadoop/hbase/master/SplitLogManager.html" title="class in org.apache.hadoop.hbase.master"><code>SplitLogManager</code></a>, <a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKSplitLog.html" title="class in org.apache.hadoop.hbase.zookeeper"><code>ZKSplitLog</code></a> and
+ <a href="../../../../../org/apache/hadoop/hbase/coordination/ZKSplitLogManagerCoordination.html" title="class in org.apache.hadoop.hbase.coordination"><code>ZKSplitLogManagerCoordination</code></a> can be removed
+ after we switch to procedure-based WAL splitting.</div>
+</li>
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+<caption><span>Nested Classes</span><span class="tabEnd"> </span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Class and Description</th>
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+<tr class="altColor">
+<td class="colFirst"><code>private static class </code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.SplitWorkerAssigner.html" title="class in org.apache.hadoop.hbase.master">SplitWALManager.SplitWorkerAssigner</a></span></code>
+<div class="block">help assign and release a worker for each WAL splitting task
+ For each worker, concurrent running splitting task should be no more than maxSplitTasks
+ If a task failed to acquire a worker, it will suspend and wait for workers available</div>
+</td>
+</tr>
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+<caption><span>Fields</span><span class="tabEnd"> </span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Field and Description</th>
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+<tr class="altColor">
+<td class="colFirst"><code>private org.apache.hadoop.conf.Configuration</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#conf">conf</a></span></code> </td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code>private org.apache.hadoop.fs.FileSystem</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#fs">fs</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/master/SplitWALManager.html#LOG">LOG</a></span></code> </td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#master">master</a></span></code> </td>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code>private org.apache.hadoop.fs.Path</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#rootDir">rootDir</a></span></code> </td>
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+<tr class="rowColor">
+<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.SplitWorkerAssigner.html" title="class in org.apache.hadoop.hbase.master">SplitWALManager.SplitWorkerAssigner</a></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#splitWorkerAssigner">splitWorkerAssigner</a></span></code> </td>
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+<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
+<tr>
+<th class="colOne" scope="col">Constructor and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#SplitWALManager-org.apache.hadoop.hbase.master.MasterServices-">SplitWALManager</a></span>(<a href="../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a> master)</code> </td>
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+<h3>Method Summary</h3>
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+<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><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/master/SplitWALManager.html#acquireSplitWALWorker-org.apache.hadoop.hbase.procedure2.Procedure-">acquireSplitWALWorker</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a><?> procedure)</code>
+<div class="block">try to acquire an worker from online servers which is executring</div>
+</td>
+</tr>
+<tr id="i1" class="rowColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#addUsedSplitWALWorker-org.apache.hadoop.hbase.ServerName-">addUsedSplitWALWorker</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> worker)</code>
+<div class="block">When master restart, there will be a new splitWorkerAssigner.</div>
+</td>
+</tr>
+<tr id="i2" class="altColor">
+<td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#createSplitWALProcedures-java.util.List-org.apache.hadoop.hbase.ServerName-">createSplitWALProcedures</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><org.apache.hadoop.fs.FileStatus> splittingWALs,
+ <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> crashedServer)</code> </td>
+</tr>
+<tr id="i3" class="rowColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#deleteSplitWAL-java.lang.String-">deleteSplitWAL</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> wal)</code> </td>
+</tr>
+<tr id="i4" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#deleteWALDir-org.apache.hadoop.hbase.ServerName-">deleteWALDir</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> serverName)</code> </td>
+</tr>
+<tr id="i5" class="rowColor">
+<td class="colFirst"><code>private org.apache.hadoop.fs.Path</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#getWALSplitDir-org.apache.hadoop.hbase.ServerName-">getWALSplitDir</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> serverName)</code> </td>
+</tr>
+<tr id="i6" class="altColor">
+<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><org.apache.hadoop.fs.FileStatus></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#getWALsToSplit-org.apache.hadoop.hbase.ServerName-boolean-">getWALsToSplit</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> serverName,
+ boolean splitMeta)</code> </td>
+</tr>
+<tr id="i7" class="rowColor">
+<td class="colFirst"><code>boolean</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#isSplitWALFinished-java.lang.String-">isSplitWALFinished</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> walPath)</code> </td>
+</tr>
+<tr id="i8" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.html#releaseSplitWALWorker-org.apache.hadoop.hbase.ServerName-org.apache.hadoop.hbase.master.procedure.MasterProcedureScheduler-">releaseSplitWALWorker</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> worker,
+ <a href="../../../../../org/apache/hadoop/hbase/master/procedure/MasterProcedureScheduler.html" title="class in org.apache.hadoop.hbase.master.procedure">MasterProcedureScheduler</a> scheduler)</code>
+<div class="block">After the worker finished the split WAL task, it will release the worker, and wake up all the
+ suspend procedures in the ProcedureEvent</div>
+</td>
+</tr>
+<tr id="i9" class="rowColor">
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+<dl>
+<dt><span class="throwsLabel">Throws:</span></dt>
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+ throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
+<dl>
+<dt><span class="throwsLabel">Throws:</span></dt>
+<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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+ throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
+<dl>
+<dt><span class="throwsLabel">Throws:</span></dt>
+<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
+</dl>
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+ throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
+<dl>
+<dt><span class="throwsLabel">Throws:</span></dt>
+<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
+</dl>
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+ <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> crashedServer)</pre>
+</li>
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+<!-- -->
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+<pre>public <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/master/SplitWALManager.html#line.147">acquireSplitWALWorker</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a><?> procedure)
+ throws <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureSuspendedException.html" title="class in org.apache.hadoop.hbase.procedure2">ProcedureSuspendedException</a></pre>
+<div class="block">try to acquire an worker from online servers which is executring</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>procedure</code> - split WAL task</dd>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>an available region server which could execute this task</dd>
+<dt><span class="throwsLabel">Throws:</span></dt>
+<dd><code><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureSuspendedException.html" title="class in org.apache.hadoop.hbase.procedure2">ProcedureSuspendedException</a></code> - if there is no available worker,
+ it will throw this exception to let the procedure wait</dd>
+</dl>
+</li>
+</ul>
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+ <a href="../../../../../org/apache/hadoop/hbase/master/procedure/MasterProcedureScheduler.html" title="class in org.apache.hadoop.hbase.master.procedure">MasterProcedureScheduler</a> scheduler)</pre>
+<div class="block">After the worker finished the split WAL task, it will release the worker, and wake up all the
+ suspend procedures in the ProcedureEvent</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>worker</code> - worker which is about to release</dd>
+<dd><code>scheduler</code> - scheduler which is to wake up the procedure event</dd>
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+<div class="block">When master restart, there will be a new splitWorkerAssigner. But if there are splitting WAL
+ tasks running on the region server side, they will not be count by the new splitWorkerAssigner.
+ Thus we should add the workers of running tasks to the assigner when we load the procedures
+ from MasterProcWALs.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>worker</code> - region server which is executing a split WAL task</dd>
+</dl>
+</li>
+</ul>
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+</ul>
+</div>
+</div>
+<!-- ========= END OF CLASS DATA ========= -->
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+<div class="bottomNav"><a name="navbar.bottom">
+<!-- -->
+</a>
+<div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div>
+<a name="navbar.bottom.firstrow">
+<!-- -->
+</a>
+<ul class="navList" title="Navigation">
+<li><a href="../../../../../overview-summary.html">Overview</a></li>
+<li><a href="package-summary.html">Package</a></li>
+<li class="navBarCell1Rev">Class</li>
+<li><a href="class-use/SplitWALManager.html">Use</a></li>
+<li><a href="package-tree.html">Tree</a></li>
+<li><a href="../../../../../deprecated-list.html">Deprecated</a></li>
+<li><a href="../../../../../index-all.html">Index</a></li>
+<li><a href="../../../../../help-doc.html">Help</a></li>
+</ul>
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+<ul class="navList">
+<li><a href="../../../../../org/apache/hadoop/hbase/master/SplitOrMergeTracker.SwitchStateTracker.html" title="class in org.apache.hadoop.hbase.master"><span class="typeNameLink">Prev Class</span></a></li>
+<li><a href="../../../../../org/apache/hadoop/hbase/master/SplitWALManager.SplitWorkerAssigner.html" title="class in org.apache.hadoop.hbase.master"><span class="typeNameLink">Next Class</span></a></li>
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+<li><a href="../../../../../index.html?org/apache/hadoop/hbase/master/SplitWALManager.html" target="_top">Frames</a></li>
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+<li><a href="../../../../../allclasses-noframe.html">All Classes</a></li>
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+<li><a href="#field.summary">Field</a> | </li>
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+<li><a href="#method.summary">Method</a></li>
+</ul>
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+<li>Detail: </li>
+<li><a href="#field.detail">Field</a> | </li>
+<li><a href="#constructor.detail">Constr</a> | </li>
+<li><a href="#method.detail">Method</a></li>
+</ul>
+</div>
+<a name="skip.navbar.bottom">
+<!-- -->
+</a></div>
+<!-- ======== END OF BOTTOM NAVBAR ======= -->
+<p class="legalCopy"><small>Copyright © 2007–2019 <a href="https://www.apache.org/">The Apache Software Foundation</a>. All rights reserved.</small></p>
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+<th class="colFirst" scope="col">Modifier and Type</th>
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+<div class="block">help assign and release a worker for each WAL splitting task
+ For each worker, concurrent running splitting task should be no more than maxSplitTasks
+ If a task failed to acquire a worker, it will suspend and wait for workers available</div>
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<td class="colOne"><a href="../../../../../org/apache/hadoop/hbase/master/class-use/SplitOrMergeTracker.SwitchStateTracker.html#org.apache.hadoop.hbase.master">SplitOrMergeTracker.SwitchStateTracker</a> </td>
</tr>
<tr class="altColor">
+<td class="colOne"><a href="../../../../../org/apache/hadoop/hbase/master/class-use/SplitWALManager.html#org.apache.hadoop.hbase.master">SplitWALManager</a>
+<div class="block">Create <a href="../../../../../org/apache/hadoop/hbase/master/procedure/SplitWALProcedure.html" title="class in org.apache.hadoop.hbase.master.procedure"><code>SplitWALProcedure</code></a> for each WAL which need to split.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colOne"><a href="../../../../../org/apache/hadoop/hbase/master/class-use/SplitWALManager.SplitWorkerAssigner.html#org.apache.hadoop.hbase.master">SplitWALManager.SplitWorkerAssigner</a>
+<div class="block">help assign and release a worker for each WAL splitting task
+ For each worker, concurrent running splitting task should be no more than maxSplitTasks
+ If a task failed to acquire a worker, it will suspend and wait for workers available</div>
+</td>
+</tr>
+<tr class="altColor">
<td class="colOne"><a href="../../../../../org/apache/hadoop/hbase/master/class-use/TableNamespaceManager.html#org.apache.hadoop.hbase.master">TableNamespaceManager</a>
<div class="block">This is a helper class used internally to manage the namespace metadata that is stored in the ns
family in meta table.</div>