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| <div class="subTitle">org.apache.hadoop.hbase.io.hfile</div> |
| <h2 title="Class PreviousBlockCompressionRatePredicator" class="title">Class PreviousBlockCompressionRatePredicator</h2> |
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| <li>org.apache.hadoop.hbase.io.hfile.PreviousBlockCompressionRatePredicator</li> |
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| <dd><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCompressedSizePredicator.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCompressedSizePredicator</a></dd> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#line.30">PreviousBlockCompressionRatePredicator</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> |
| implements <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCompressedSizePredicator.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCompressedSizePredicator</a></pre> |
| <div class="block">This BlockCompressedSizePredicator implementation adjusts the block size limit based on the |
| compression rate of the block contents read so far. For the first block, adjusted size would be |
| zero, so it performs a compression of current block contents and calculate compression rate and |
| adjusted size. For subsequent blocks, decision whether the block should be finished or not will |
| be based on the compression rate calculated for the previous block.</div> |
| </li> |
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| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#adjustedBlockSize">adjustedBlockSize</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/io/hfile/PreviousBlockCompressionRatePredicator.html#compressionRatio">compressionRatio</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/io/hfile/PreviousBlockCompressionRatePredicator.html#configuredMaxBlockSize">configuredMaxBlockSize</a></span></code> </td> |
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| <h3>Fields inherited from interface org.apache.hadoop.hbase.io.hfile.<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCompressedSizePredicator.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCompressedSizePredicator</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCompressedSizePredicator.html#BLOCK_COMPRESSED_SIZE_PREDICATOR">BLOCK_COMPRESSED_SIZE_PREDICATOR</a>, <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCompressedSizePredicator.html#MAX_BLOCK_SIZE_UNCOMPRESSED">MAX_BLOCK_SIZE_UNCOMPRESSED</a></code></li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#PreviousBlockCompressionRatePredicator--">PreviousBlockCompressionRatePredicator</a></span>()</code> </td> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#shouldFinishBlock-int-">shouldFinishBlock</a></span>(int uncompressed)</code> |
| <div class="block">Returns <b>true</b> if the passed uncompressed size is larger than the limit calculated by |
| <code>updateLatestBlockSizes</code>.</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/io/hfile/PreviousBlockCompressionRatePredicator.html#updateLatestBlockSizes-org.apache.hadoop.hbase.io.hfile.HFileContext-int-int-">updateLatestBlockSizes</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/HFileContext.html" title="class in org.apache.hadoop.hbase.io.hfile">HFileContext</a> context, |
| int uncompressed, |
| int compressed)</code> |
| <div class="block">Recalculates compression rate for the last block and adjusts the block size limit as: |
| BLOCK_SIZE * (uncompressed/compressed).</div> |
| </td> |
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| <a name="adjustedBlockSize"> |
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| <li class="blockList"> |
| <h4>adjustedBlockSize</h4> |
| <pre>private int <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#line.32">adjustedBlockSize</a></pre> |
| </li> |
| </ul> |
| <a name="compressionRatio"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>compressionRatio</h4> |
| <pre>private int <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#line.33">compressionRatio</a></pre> |
| </li> |
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| <a name="configuredMaxBlockSize"> |
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| <h4>configuredMaxBlockSize</h4> |
| <pre>private int <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#line.34">configuredMaxBlockSize</a></pre> |
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| <a name="PreviousBlockCompressionRatePredicator--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>PreviousBlockCompressionRatePredicator</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#line.30">PreviousBlockCompressionRatePredicator</a>()</pre> |
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| <a name="updateLatestBlockSizes-org.apache.hadoop.hbase.io.hfile.HFileContext-int-int-"> |
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| <h4>updateLatestBlockSizes</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#line.44">updateLatestBlockSizes</a>(<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/HFileContext.html" title="class in org.apache.hadoop.hbase.io.hfile">HFileContext</a> context, |
| int uncompressed, |
| int compressed)</pre> |
| <div class="block">Recalculates compression rate for the last block and adjusts the block size limit as: |
| BLOCK_SIZE * (uncompressed/compressed).</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCompressedSizePredicator.html#updateLatestBlockSizes-org.apache.hadoop.hbase.io.hfile.HFileContext-int-int-">updateLatestBlockSizes</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCompressedSizePredicator.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCompressedSizePredicator</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - HFIleContext containing the configured max block size.</dd> |
| <dd><code>uncompressed</code> - the uncompressed size of last block written.</dd> |
| <dd><code>compressed</code> - the compressed size of last block written.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="shouldFinishBlock-int-"> |
| <!-- --> |
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| <h4>shouldFinishBlock</h4> |
| <pre>public boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/PreviousBlockCompressionRatePredicator.html#line.56">shouldFinishBlock</a>(int uncompressed)</pre> |
| <div class="block">Returns <b>true</b> if the passed uncompressed size is larger than the limit calculated by |
| <code>updateLatestBlockSizes</code>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCompressedSizePredicator.html#shouldFinishBlock-int-">shouldFinishBlock</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCompressedSizePredicator.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCompressedSizePredicator</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>uncompressed</code> - true if the block should be finished.</dd> |
| </dl> |
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