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| <div class="subTitle">org.apache.hadoop.hbase.regionserver.compactions</div> |
| <h2 title="Class ExploringCompactionPolicy" class="title">Class ExploringCompactionPolicy</h2> |
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| <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><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionPolicy.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">org.apache.hadoop.hbase.regionserver.compactions.CompactionPolicy</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/SortedCompactionPolicy.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">org.apache.hadoop.hbase.regionserver.compactions.SortedCompactionPolicy</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/RatioBasedCompactionPolicy.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">org.apache.hadoop.hbase.regionserver.compactions.RatioBasedCompactionPolicy</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.hadoop.hbase.regionserver.compactions.ExploringCompactionPolicy</li> |
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| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/FIFOCompactionPolicy.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">FIFOCompactionPolicy</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#line.40">ExploringCompactionPolicy</a> |
| extends <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/RatioBasedCompactionPolicy.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">RatioBasedCompactionPolicy</a></pre> |
| <div class="block">Class to pick which files if any to compact together. |
| |
| This class will search all possibilities for different and if it gets stuck it will choose |
| the smallest set of files to compact.</div> |
| </li> |
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| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#LOG">LOG</a></span></code> </td> |
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| <h3>Fields inherited from class org.apache.hadoop.hbase.regionserver.compactions.<a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionPolicy.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">CompactionPolicy</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionPolicy.html#comConf">comConf</a>, <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionPolicy.html#storeConfigInfo">storeConfigInfo</a></code></li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#ExploringCompactionPolicy-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.regionserver.StoreConfigInformation-">ExploringCompactionPolicy</a></span>(org.apache.hadoop.conf.Configuration conf, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/StoreConfigInformation.html" title="interface in org.apache.hadoop.hbase.regionserver">StoreConfigInformation</a> storeConfigInfo)</code> |
| <div class="block">Constructor for ExploringCompactionPolicy.</div> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#applyCompactionPolicy-java.util.ArrayList-boolean-boolean-">applyCompactionPolicy</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> candidates, |
| boolean mayUseOffPeak, |
| boolean mightBeStuck)</code> |
| <div class="block">-- Default minor compaction selection algorithm: |
| choose CompactSelection from candidates -- |
| First exclude bulk-load files if indicated in configuration.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#applyCompactionPolicy-java.util.List-boolean-boolean-int-int-">applyCompactionPolicy</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><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> candidates, |
| boolean mightBeStuck, |
| boolean mayUseOffPeak, |
| int minFiles, |
| int maxFiles)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>private boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#filesInRatio-java.util.List-double-">filesInRatio</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><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> files, |
| double currentRatio)</code> |
| <div class="block">Check that all files satisfy the constraint |
| FileSize(i) <= ( Sum(0,N,FileSize(_)) - FileSize(i) ) * Ratio.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#getTotalStoreSize-java.util.List-">getTotalStoreSize</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><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> potentialMatchFiles)</code> |
| <div class="block">Find the total size of a list of store files.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>private boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#isBetterSelection-java.util.List-long-java.util.List-long-boolean-">isBetterSelection</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><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> bestSelection, |
| long bestSize, |
| <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/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> selection, |
| long size, |
| boolean mightBeStuck)</code> </td> |
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| <h3>Methods inherited from class org.apache.hadoop.hbase.regionserver.compactions.<a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/RatioBasedCompactionPolicy.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">RatioBasedCompactionPolicy</a></h3> |
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| <h3>Methods inherited from class org.apache.hadoop.hbase.regionserver.compactions.<a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionPolicy.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">CompactionPolicy</a></h3> |
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| <h4>LOG</h4> |
| <pre>private static final org.slf4j.Logger <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#line.41">LOG</a></pre> |
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| <a name="ExploringCompactionPolicy-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.regionserver.StoreConfigInformation-"> |
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| <h4>ExploringCompactionPolicy</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#line.48">ExploringCompactionPolicy</a>(org.apache.hadoop.conf.Configuration conf, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/StoreConfigInformation.html" title="interface in org.apache.hadoop.hbase.regionserver">StoreConfigInformation</a> storeConfigInfo)</pre> |
| <div class="block">Constructor for ExploringCompactionPolicy.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - The configuration object</dd> |
| <dd><code>storeConfigInfo</code> - An object to provide info about the store.</dd> |
| </dl> |
| </li> |
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| <a name="applyCompactionPolicy-java.util.ArrayList-boolean-boolean-"> |
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| <h4>applyCompactionPolicy</h4> |
| <pre>protected final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#line.54">applyCompactionPolicy</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> candidates, |
| boolean mayUseOffPeak, |
| boolean mightBeStuck) |
| 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> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/RatioBasedCompactionPolicy.html#applyCompactionPolicy-java.util.ArrayList-boolean-boolean-">RatioBasedCompactionPolicy</a></code></span></div> |
| <div class="block">-- Default minor compaction selection algorithm: |
| choose CompactSelection from candidates -- |
| First exclude bulk-load files if indicated in configuration. |
| Start at the oldest file and stop when you find the first file that |
| meets compaction criteria: |
| (1) a recently-flushed, small file (i.e. <= minCompactSize) |
| OR |
| (2) within the compactRatio of sum(newer_files) |
| Given normal skew, any newer files will also meet this criteria |
| <p/> |
| Additional Note: |
| If fileSizes.size() >> maxFilesToCompact, we will recurse on |
| compact(). Consider the oldest files first to avoid a |
| situation where we always compact [end-threshold,end). Then, the |
| last file becomes an aggregate of the previous compactions. |
| |
| normal skew: |
| |
| older ----> newer (increasing seqID) |
| _ |
| | | _ |
| | | | | _ |
| --|-|- |-|- |-|---_-------_------- minCompactSize |
| | | | | | | | | _ | | |
| | | | | | | | | | | | | |
| | | | | | | | | | | | |</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/RatioBasedCompactionPolicy.html#applyCompactionPolicy-java.util.ArrayList-boolean-boolean-">applyCompactionPolicy</a></code> in class <code><a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/RatioBasedCompactionPolicy.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">RatioBasedCompactionPolicy</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>candidates</code> - pre-filtrate</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>filtered subset</dd> |
| <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> |
| </li> |
| </ul> |
| <a name="applyCompactionPolicy-java.util.List-boolean-boolean-int-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>applyCompactionPolicy</h4> |
| <pre>public <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/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#line.60">applyCompactionPolicy</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> candidates, |
| boolean mightBeStuck, |
| boolean mayUseOffPeak, |
| int minFiles, |
| int maxFiles)</pre> |
| </li> |
| </ul> |
| <a name="isBetterSelection-java.util.List-long-java.util.List-long-boolean-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isBetterSelection</h4> |
| <pre>private boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#line.127">isBetterSelection</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> bestSelection, |
| long bestSize, |
| <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/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> selection, |
| long size, |
| boolean mightBeStuck)</pre> |
| </li> |
| </ul> |
| <a name="getTotalStoreSize-java.util.List-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getTotalStoreSize</h4> |
| <pre>private long <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#line.148">getTotalStoreSize</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> potentialMatchFiles)</pre> |
| <div class="block">Find the total size of a list of store files.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>potentialMatchFiles</code> - StoreFile list.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Sum of StoreFile.getReader().length();</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="filesInRatio-java.util.List-double-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>filesInRatio</h4> |
| <pre>private boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.html#line.160">filesInRatio</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver">HStoreFile</a>> files, |
| double currentRatio)</pre> |
| <div class="block">Check that all files satisfy the constraint |
| FileSize(i) <= ( Sum(0,N,FileSize(_)) - FileSize(i) ) * Ratio.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>files</code> - List of store files to consider as a compaction candidate.</dd> |
| <dd><code>currentRatio</code> - The ratio to use.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a boolean if these files satisfy the ratio constraints.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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