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+<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> +</ul> +</div> +<a name="skip.navbar.top"> +<!-- --> +</a></div> +<!-- ========= END OF TOP NAVBAR ========= --> +<!-- ======== START OF CLASS DATA ======== --> +<div class="header"> +<div class="subTitle">org.apache.hadoop.hbase.regionserver.throttle</div> +<h2 title="Class StoreHotnessProtector" class="title">Class StoreHotnessProtector</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.regionserver.throttle.StoreHotnessProtector</li> +</ul> +</li> +</ul> +<div class="description"> +<ul class="blockList"> +<li class="blockList"> +<hr> +<br> +<pre>@InterfaceAudience.Private +public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#line.62">StoreHotnessProtector</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">StoreHotnessProtector is designed to help limit the concurrency of puts with dense columns, it + does best-effort to avoid exhausting all RS's handlers. When a lot of clients write requests with + dense (hundreds) columns to a Store at the same time, it will lead to blocking of RS because CSLM + degrades when concurrency goes up. It's not a kind of throttling. Throttling is user-oriented, + while StoreHotnessProtector is system-oriented, RS-self-protected mechanism. + <p> + There are three key parameters: + <p> + 1. parallelPutToStoreThreadLimitCheckMinColumnCount: If the amount of columns exceed this + threshold, the HotProtector will work, 100 by default + <p> + 2. parallelPutToStoreThreadLimit: The amount of concurrency allowed to write puts to a Store at + the same time. + <p> + 3. parallelPreparePutToStoreThreadLimit: The amount of concurrency allowed to + prepare writing puts to a Store at the same time. + <p> + Notice that our writing pipeline includes three key process: MVCC acquire, writing MemStore, and + WAL. Only limit the concurrency of writing puts to Store(parallelPutToStoreThreadLimit) is not + enough since the actual concurrency of puts may still exceed the limit when MVCC contention or + slow WAL sync happens. This is why parallelPreparePutToStoreThreadLimit is needed. + <p> + This protector is enabled by default and could be turned off by setting + hbase.region.store.parallel.put.limit to 0, supporting online configuration change.</div> +</li> +</ul> +</div> +<div class="summary"> +<ul class="blockList"> +<li class="blockList"> +<!-- =========== FIELD SUMMARY =========== --> +<ul class="blockList"> +<li class="blockList"><a name="field.summary"> +<!-- --> +</a> +<h3>Field Summary</h3> +<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> +<caption><span>Fields</span><span class="tabEnd"> </span></caption> +<tr> +<th class="colFirst" scope="col">Modifier and Type</th> +<th class="colLast" scope="col">Field and Description</th> +</tr> +<tr class="altColor"> +<td class="colFirst"><code>private static int</code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#DEFAULT_PARALLEL_PREPARE_PUT_STORE_MULTIPLIER">DEFAULT_PARALLEL_PREPARE_PUT_STORE_MULTIPLIER</a></span></code> </td> +</tr> +<tr class="rowColor"> +<td class="colFirst"><code>private static int</code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#DEFAULT_PARALLEL_PUT_STORE_THREADS_LIMIT">DEFAULT_PARALLEL_PUT_STORE_THREADS_LIMIT</a></span></code> </td> +</tr> +<tr class="altColor"> +<td class="colFirst"><code>private static int</code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#DEFAULT_PARALLEL_PUT_STORE_THREADS_LIMIT_MIN_COLUMN_NUM">DEFAULT_PARALLEL_PUT_STORE_THREADS_LIMIT_MIN_COLUMN_NUM</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/throttle/StoreHotnessProtector.html#FIXED_SIZE">FIXED_SIZE</a></span></code> </td> +</tr> +<tr class="altColor"> +<td class="colFirst"><code>private static org.apache.commons.logging.Log</code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#LOG">LOG</a></span></code> </td> +</tr> +<tr class="rowColor"> +<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true"; title="class or interface in java.lang">String</a></code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#PARALLEL_PREPARE_PUT_STORE_MULTIPLIER">PARALLEL_PREPARE_PUT_STORE_MULTIPLIER</a></span></code> </td> +</tr> +<tr class="altColor"> +<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true"; title="class or interface in java.lang">String</a></code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#PARALLEL_PUT_STORE_THREADS_LIMIT">PARALLEL_PUT_STORE_THREADS_LIMIT</a></span></code> </td> +</tr> +<tr class="rowColor"> +<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true"; title="class or interface in java.lang">String</a></code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#PARALLEL_PUT_STORE_THREADS_LIMIT_MIN_COLUMN_COUNT">PARALLEL_PUT_STORE_THREADS_LIMIT_MIN_COLUMN_COUNT</a></span></code> </td> +</tr> +<tr class="altColor"> +<td class="colFirst"><code>private int</code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#parallelPreparePutToStoreThreadLimit">parallelPreparePutToStoreThreadLimit</a></span></code> </td> +</tr> +<tr class="rowColor"> +<td class="colFirst"><code>private int</code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#parallelPutToStoreThreadLimit">parallelPutToStoreThreadLimit</a></span></code> </td> +</tr> +<tr class="altColor"> +<td class="colFirst"><code>private int</code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#parallelPutToStoreThreadLimitCheckMinColumnCount">parallelPutToStoreThreadLimitCheckMinColumnCount</a></span></code> </td> +</tr> +<tr class="rowColor"> +<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true"; 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title="class or interface in java.util">Map</a><byte[],<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/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a>>> familyMaps)</code> </td> +</tr> +<tr id="i1" class="rowColor"> +<td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true"; title="class or interface in java.util">Map</a><byte[],<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicInteger.html?is-external=true"; title="class or interface in java.util.concurrent.atomic">AtomicInteger</a>></code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#getPreparePutToStoreMap--">getPreparePutToStoreMap</a></span>()</code> </td> +</tr> +<tr id="i2" class="altColor"> +<td class="colFirst"><code>void</code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#init-org.apache.hadoop.conf.Configuration-">init</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> +</tr> +<tr id="i3" class="rowColor"> +<td class="colFirst"><code>boolean</code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html#isEnable--">isEnable</a></span>()</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/regionserver/throttle/StoreHotnessProtector.html#start-java.util.Map-">start</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true"; 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charset=UTF-8"> +<title>Uses of Class org.apache.hadoop.hbase.regionserver.throttle.StoreHotnessProtector (Apache HBase 3.0.0-SNAPSHOT API)</title> +<link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style"> +<script type="text/javascript" src="../../../../../../../script.js"></script> +</head> +<body> +<script type="text/javascript"><!-- + try { + if (location.href.indexOf('is-external=true') == -1) { + parent.document.title="Uses of Class org.apache.hadoop.hbase.regionserver.throttle.StoreHotnessProtector (Apache HBase 3.0.0-SNAPSHOT API)"; + } + } + catch(err) { + } +//--> +</script> +<noscript> +<div>JavaScript is disabled on your browser.</div> +</noscript> +<!-- ========= START OF TOP NAVBAR ======= --> +<div class="topNav"><a name="navbar.top"> +<!-- --> +</a> +<div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> +<a name="navbar.top.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><a href="../../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html" title="class in org.apache.hadoop.hbase.regionserver.throttle">Class</a></li> +<li class="navBarCell1Rev">Use</li> +<li><a href="../../../../../../../overview-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> +</div> +<div class="subNav"> +<ul class="navList"> +<li>Prev</li> +<li>Next</li> +</ul> +<ul class="navList"> +<li><a href="../../../../../../../index.html?org/apache/hadoop/hbase/regionserver/throttle/class-use/StoreHotnessProtector.html" target="_top">Frames</a></li> +<li><a href="StoreHotnessProtector.html" target="_top">No Frames</a></li> +</ul> +<ul class="navList" id="allclasses_navbar_top"> +<li><a href="../../../../../../../allclasses-noframe.html">All Classes</a></li> +</ul> +<div> +<script type="text/javascript"><!-- + allClassesLink = document.getElementById("allclasses_navbar_top"); 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target="classFrame">PressureAwareThroughputController</a></li> <li><a href="PressureAwareThroughputController.ActiveOperation.html" title="class in org.apache.hadoop.hbase.regionserver.throttle" target="classFrame">PressureAwareThroughputController.ActiveOperation</a></li> +<li><a href="StoreHotnessProtector.html" title="class in org.apache.hadoop.hbase.regionserver.throttle" target="classFrame">StoreHotnessProtector</a></li> <li><a href="ThroughputControlUtil.html" title="class in org.apache.hadoop.hbase.regionserver.throttle" target="classFrame">ThroughputControlUtil</a></li> </ul> </div> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a754d895/devapidocs/org/apache/hadoop/hbase/regionserver/throttle/package-summary.html ---------------------------------------------------------------------- diff --git a/devapidocs/org/apache/hadoop/hbase/regionserver/throttle/package-summary.html b/devapidocs/org/apache/hadoop/hbase/regionserver/throttle/package-summary.html index b25ab38..3caa86b 100644 --- a/devapidocs/org/apache/hadoop/hbase/regionserver/throttle/package-summary.html +++ b/devapidocs/org/apache/hadoop/hbase/regionserver/throttle/package-summary.html @@ -151,6 +151,13 @@ </td> </tr> <tr class="rowColor"> +<td class="colFirst"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/StoreHotnessProtector.html" title="class in org.apache.hadoop.hbase.regionserver.throttle">StoreHotnessProtector</a></td> +<td class="colLast"> +<div class="block">StoreHotnessProtector is designed to help limit the concurrency of puts with dense columns, it + does best-effort to avoid exhausting all RS's handlers.</div> +</td> +</tr> +<tr class="altColor"> <td class="colFirst"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/throttle/ThroughputControlUtil.html" title="class in org.apache.hadoop.hbase.regionserver.throttle">ThroughputControlUtil</a></td> <td class="colLast"> <div class="block">Helper methods for throttling</div> 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