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| <div class="subTitle">org.apache.hadoop.hbase.regionserver.wal</div> |
| <h2 title="Class SequenceIdAccounting" class="title">Class SequenceIdAccounting</h2> |
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| <li>org.apache.hadoop.hbase.regionserver.wal.SequenceIdAccounting</li> |
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| <pre>@InterfaceAudience.Private |
| class <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.53">SequenceIdAccounting</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">Accounting of sequence ids per region and then by column family. So we can keep our accounting |
| current, call startCacheFlush and then finishedCacheFlush or abortCacheFlush so this instance can |
| keep abreast of the state of sequence id persistence. Also call update per append. |
| <p> |
| For the implementation, we assume that all the <code>encodedRegionName</code> passed in are gotten by |
| <a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html#getEncodedNameAsBytes--"><code>RegionInfo.getEncodedNameAsBytes()</code></a>. So it is safe to use |
| it as a hash key. And for family name, we use <a href="../../../../../../org/apache/hadoop/hbase/util/ImmutableByteArray.html" title="class in org.apache.hadoop.hbase.util"><code>ImmutableByteArray</code></a> as key. This is because |
| hash based map is much faster than RBTree or CSLM and here we are on the critical write path. See |
| HBASE-16278 for more details. |
| </p></div> |
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| <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 <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/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../../../org/apache/hadoop/hbase/util/ImmutableByteArray.html" title="class in org.apache.hadoop.hbase.util">ImmutableByteArray</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#flushingSequenceIds">flushingSequenceIds</a></span></code> |
| <div class="block">Map of encoded region names and family names to their lowest or OLDEST sequence/edit id |
| currently being flushed out to hfiles.</div> |
| </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" title="class or interface in java.util">Map</a><byte[],<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#highestSequenceIds">highestSequenceIds</a></span></code> |
| <div class="block"> |
| Map of region encoded names to the latest/highest region sequence id.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#LOG">LOG</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/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><byte[],<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><<a href="../../../../../../org/apache/hadoop/hbase/util/ImmutableByteArray.html" title="class in org.apache.hadoop.hbase.util">ImmutableByteArray</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds">lowestUnflushedSequenceIds</a></span></code> |
| <div class="block">Map of encoded region names and family names to their OLDEST -- i.e.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#tieLock">tieLock</a></span></code> |
| <div class="block">This lock ties all operations on <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#flushingSequenceIds"><code>flushingSequenceIds</code></a> and |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a> Maps.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| <h3>Constructor Summary</h3> |
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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/regionserver/wal/SequenceIdAccounting.html#SequenceIdAccounting--">SequenceIdAccounting</a></span>()</code> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <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>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#abortCacheFlush-byte:A-">abortCacheFlush</a></span>(byte[] encodedRegionName)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>(package private) boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#areAllLower-java.util.Map-java.util.Collection-">areAllLower</a></span>(<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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> sequenceids, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><byte[]> keysBlocking)</code> |
| <div class="block">See if passed <code>sequenceids</code> are lower -- i.e.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#completeCacheFlush-byte:A-long-">completeCacheFlush</a></span>(byte[] encodedRegionName, |
| long maxFlushedSeqId)</code> </td> |
| </tr> |
| <tr id="i3" 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/List.html?is-external=true" title="class or interface in java.util">List</a><byte[]>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#findLower-java.util.Map-">findLower</a></span>(<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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> sequenceids)</code> |
| <div class="block">Iterates over the given Map and compares sequence ids with corresponding entries in |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>private <T extends <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><?,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>>><br><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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#flattenToLowestSequenceId-java.util.Map-">flattenToLowestSequenceId</a></span>(<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[],T> src)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>(package private) long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#getLowestSequenceId-byte:A-">getLowestSequenceId</a></span>(byte[] encodedRegionName)</code> |
| <div class="block">Returns the lowest unflushed sequence id for the region.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>(package private) long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#getLowestSequenceId-byte:A-byte:A-">getLowestSequenceId</a></span>(byte[] encodedRegionName, |
| byte[] familyName)</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>private static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#getLowestSequenceId-java.util.Map-">getLowestSequenceId</a></span>(<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><?,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> sequenceids)</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><<a href="../../../../../../org/apache/hadoop/hbase/util/ImmutableByteArray.html" title="class in org.apache.hadoop.hbase.util">ImmutableByteArray</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#getOrCreateLowestSequenceIds-byte:A-">getOrCreateLowestSequenceIds</a></span>(byte[] encodedRegionName)</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#onRegionClose-byte:A-">onRegionClose</a></span>(byte[] encodedRegionName)</code> |
| <div class="block">Clear all the records of the given region as it is going to be closed.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#resetHighest--">resetHighest</a></span>()</code> |
| <div class="block">Reset the accounting of highest sequenceid by regionname.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#startCacheFlush-byte:A-java.util.Map-">startCacheFlush</a></span>(byte[] encodedRegionName, |
| <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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> familyToSeq)</code> </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#startCacheFlush-byte:A-java.util.Set-">startCacheFlush</a></span>(byte[] encodedRegionName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><byte[]> families)</code> </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#update-byte:A-java.util.Set-long-boolean-">update</a></span>(byte[] encodedRegionName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><byte[]> families, |
| long sequenceid, |
| boolean lowest)</code> |
| <div class="block">We've been passed a new sequenceid for the region.</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#updateStore-byte:A-byte:A-java.lang.Long-boolean-">updateStore</a></span>(byte[] encodedRegionName, |
| byte[] familyName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a> sequenceId, |
| boolean onlyIfGreater)</code> |
| <div class="block">Update the store sequence id, e.g., upon executing in-memory compaction</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<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></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
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| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
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| <h3>Field Detail</h3> |
| <a name="LOG"> |
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| </a> |
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| <h4>LOG</h4> |
| <pre>private static final org.slf4j.Logger <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.54">LOG</a></pre> |
| </li> |
| </ul> |
| <a name="tieLock"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>tieLock</h4> |
| <pre>private final <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> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.72">tieLock</a></pre> |
| <div class="block">This lock ties all operations on <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#flushingSequenceIds"><code>flushingSequenceIds</code></a> and |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a> Maps. <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a> has the |
| lowest outstanding sequence ids EXCEPT when flushing. When we flush, the current |
| lowest set for the region/column family are moved (atomically because of this lock) to |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#flushingSequenceIds"><code>flushingSequenceIds</code></a>. |
| |
| <p>The two Maps are tied by this locking object EXCEPT when we go to update the lowest |
| entry; see <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a>. In here is a putIfAbsent call on |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a>. In this latter case, we will add this lowest |
| sequence id if we find that there is no entry for the current column family. There will be no |
| entry only if we just came up OR we have moved aside current set of lowest sequence ids |
| because the current set are being flushed (by putting them into <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#flushingSequenceIds"><code>flushingSequenceIds</code></a>). |
| This is how we pick up the next 'lowest' sequence id per region per column family to be used |
| figuring what is in the next flush.</div> |
| </li> |
| </ul> |
| <a name="lowestUnflushedSequenceIds"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>lowestUnflushedSequenceIds</h4> |
| <pre>private final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><byte[],<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><<a href="../../../../../../org/apache/hadoop/hbase/util/ImmutableByteArray.html" title="class in org.apache.hadoop.hbase.util">ImmutableByteArray</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.86">lowestUnflushedSequenceIds</a></pre> |
| <div class="block">Map of encoded region names and family names to their OLDEST -- i.e. their first, |
| the longest-lived, their 'earliest', the 'lowest' -- sequence id. |
| |
| <p>When we flush, the current lowest sequence ids get cleared and added to |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#flushingSequenceIds"><code>flushingSequenceIds</code></a>. The next append that comes in, is then added |
| here to <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a> as the next lowest sequenceid. |
| |
| <p>If flush fails, currently server is aborted so no need to restore previous sequence ids. |
| <p>Needs to be concurrent Maps because we use putIfAbsent updating oldest.</div> |
| </li> |
| </ul> |
| <a name="flushingSequenceIds"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>flushingSequenceIds</h4> |
| <pre>private final <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/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../../../org/apache/hadoop/hbase/util/ImmutableByteArray.html" title="class in org.apache.hadoop.hbase.util">ImmutableByteArray</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.94">flushingSequenceIds</a></pre> |
| <div class="block">Map of encoded region names and family names to their lowest or OLDEST sequence/edit id |
| currently being flushed out to hfiles. Entries are moved here from |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a> while the lock <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#tieLock"><code>tieLock</code></a> is held |
| (so movement between the Maps is atomic).</div> |
| </li> |
| </ul> |
| <a name="highestSequenceIds"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>highestSequenceIds</h4> |
| <pre>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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.107">highestSequenceIds</a></pre> |
| <div class="block"><p> |
| Map of region encoded names to the latest/highest region sequence id. Updated on each call to |
| append. |
| </p> |
| <p> |
| This map uses byte[] as the key, and uses reference equality. It works in our use case as we |
| use <a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html#getEncodedNameAsBytes--"><code>RegionInfo.getEncodedNameAsBytes()</code></a> as keys. For a |
| given region, it always returns the same array. |
| </p></div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="SequenceIdAccounting--"> |
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| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>SequenceIdAccounting</h4> |
| <pre><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.53">SequenceIdAccounting</a>()</pre> |
| </li> |
| </ul> |
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| <h3>Method Detail</h3> |
| <a name="getLowestSequenceId-byte:A-"> |
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| <h4>getLowestSequenceId</h4> |
| <pre>long <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.114">getLowestSequenceId</a>(byte[] encodedRegionName)</pre> |
| <div class="block">Returns the lowest unflushed sequence id for the region.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Lowest outstanding unflushed sequenceid for <code>encodedRegionName</code>. Will |
| return <a href="../../../../../../org/apache/hadoop/hbase/HConstants.html#NO_SEQNUM"><code>HConstants.NO_SEQNUM</code></a> when none.</dd> |
| </dl> |
| </li> |
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| <h4>getLowestSequenceId</h4> |
| <pre>long <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.129">getLowestSequenceId</a>(byte[] encodedRegionName, |
| byte[] familyName)</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Lowest outstanding unflushed sequenceid for <code>encodedRegionname</code> and |
| <code>familyName</code>. Returned sequenceid may be for an edit currently being |
| flushed.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="resetHighest--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>resetHighest</h4> |
| <pre><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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.155">resetHighest</a>()</pre> |
| <div class="block">Reset the accounting of highest sequenceid by regionname.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Return the previous accounting Map of regions to the last sequence id written into |
| each.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="update-byte:A-java.util.Set-long-boolean-"> |
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| </a> |
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| <h4>update</h4> |
| <pre>void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.170">update</a>(byte[] encodedRegionName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><byte[]> families, |
| long sequenceid, |
| boolean lowest)</pre> |
| <div class="block">We've been passed a new sequenceid for the region. Set it as highest seen for this region and |
| if we are to record oldest, or lowest sequenceids, save it as oldest seen if nothing |
| currently older.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>encodedRegionName</code> - </dd> |
| <dd><code>families</code> - </dd> |
| <dd><code>sequenceid</code> - </dd> |
| <dd><code>lowest</code> - Whether to keep running account of oldest sequence id.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="onRegionClose-byte:A-"> |
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| </a> |
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| <h4>onRegionClose</h4> |
| <pre>void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.192">onRegionClose</a>(byte[] encodedRegionName)</pre> |
| <div class="block">Clear all the records of the given region as it is going to be closed. |
| <p/> |
| We will call this once we get the region close marker. We need this because that, if we use |
| Durability.ASYNC_WAL, after calling startCacheFlush, we may still get some ongoing wal entries |
| that has not been processed yet, this will lead to orphan records in the |
| lowestUnflushedSequenceIds and then cause too many WAL files. |
| <p/> |
| See HBASE-23157 for more details.</div> |
| </li> |
| </ul> |
| <a name="updateStore-byte:A-byte:A-java.lang.Long-boolean-"> |
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| </a> |
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| <h4>updateStore</h4> |
| <pre>void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.209">updateStore</a>(byte[] encodedRegionName, |
| byte[] familyName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a> sequenceId, |
| boolean onlyIfGreater)</pre> |
| <div class="block">Update the store sequence id, e.g., upon executing in-memory compaction</div> |
| </li> |
| </ul> |
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| <h4>getOrCreateLowestSequenceIds</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><<a href="../../../../../../org/apache/hadoop/hbase/util/ImmutableByteArray.html" title="class in org.apache.hadoop.hbase.util">ImmutableByteArray</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.241">getOrCreateLowestSequenceIds</a>(byte[] encodedRegionName)</pre> |
| </li> |
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| <h4>getLowestSequenceId</h4> |
| <pre>private static long <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.251">getLowestSequenceId</a>(<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><?,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> sequenceids)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>sequenceids</code> - Map to search for lowest value.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Lowest value found in <code>sequenceids</code>.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="flattenToLowestSequenceId-java.util.Map-"> |
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| <ul class="blockList"> |
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| <h4>flattenToLowestSequenceId</h4> |
| <pre>private <T extends <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><?,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>>> <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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.270">flattenToLowestSequenceId</a>(<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[],T> src)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>src</code> - </dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>New Map that has same keys as <code>src</code> but instead of a Map for a value, it |
| instead has found the smallest sequence id and it returns that as the value instead.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="startCacheFlush-byte:A-java.util.Set-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>startCacheFlush</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.293">startCacheFlush</a>(byte[] encodedRegionName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><byte[]> families)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>encodedRegionName</code> - Region to flush.</dd> |
| <dd><code>families</code> - Families to flush. May be a subset of all families in the region.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Returns <a href="../../../../../../org/apache/hadoop/hbase/HConstants.html#NO_SEQNUM"><code>HConstants.NO_SEQNUM</code></a> if we are flushing the whole region OR if |
| we are flushing a subset of all families but there are no edits in those families not |
| being flushed; in other words, this is effectively same as a flush of all of the region |
| though we were passed a subset of regions. Otherwise, it returns the sequence id of the |
| oldest/lowest outstanding edit.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="startCacheFlush-byte:A-java.util.Map-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>startCacheFlush</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.301">startCacheFlush</a>(byte[] encodedRegionName, |
| <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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> familyToSeq)</pre> |
| </li> |
| </ul> |
| <a name="completeCacheFlush-byte:A-long-"> |
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| </a> |
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| <h4>completeCacheFlush</h4> |
| <pre>void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.356">completeCacheFlush</a>(byte[] encodedRegionName, |
| long maxFlushedSeqId)</pre> |
| </li> |
| </ul> |
| <a name="abortCacheFlush-byte:A-"> |
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| </a> |
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| <h4>abortCacheFlush</h4> |
| <pre>void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.389">abortCacheFlush</a>(byte[] encodedRegionName)</pre> |
| </li> |
| </ul> |
| <a name="areAllLower-java.util.Map-java.util.Collection-"> |
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| </a> |
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| <h4>areAllLower</h4> |
| <pre>boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.434">areAllLower</a>(<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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> sequenceids, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><byte[]> keysBlocking)</pre> |
| <div class="block">See if passed <code>sequenceids</code> are lower -- i.e. earlier -- than any outstanding |
| sequenceids, sequenceids we are holding on to in this accounting instance.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>sequenceids</code> - Keyed by encoded region name. Cannot be null (doesn't make sense for it to |
| be null).</dd> |
| <dd><code>keysBlocking</code> - An optional collection that is used to return the specific keys that are |
| causing this method to return false.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if all sequenceids are lower, older than, the old sequenceids in this instance.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="findLower-java.util.Map-"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>findLower</h4> |
| <pre><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/List.html?is-external=true" title="class or interface in java.util">List</a><byte[]>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#line.474">findLower</a>(<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/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> sequenceids)</pre> |
| <div class="block">Iterates over the given Map and compares sequence ids with corresponding entries in |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a>. If a region in |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.html#lowestUnflushedSequenceIds"><code>lowestUnflushedSequenceIds</code></a> has a sequence id less than that passed in |
| <code>sequenceids</code> then return it.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>sequenceids</code> - Sequenceids keyed by encoded region name.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>stores of regions found in this instance with sequence ids less than those passed in.</dd> |
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