cassandra-server

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  <html lang="en"> <head>  <title>MetadataCollector (apache-cassandra API)</title> <meta name="date" content="2014-09-07"> <link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style"> </head> <body> <script type="text/javascript"> </script> <noscript> <div>JavaScript is disabled on your browser.</div> </noscript>  <div class="topNav"><a name="navbar_top">  </a><a href="#skip-navbar_top" title="Skip navigation links"></a><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 class="navBarCell1Rev">Class</li> <li><a href="class-use/MetadataCollector.html">Use</a></li> <li><a href="package-tree.html">Tree</a></li> <li><a href="../../../../../../deprecated-list.html">Deprecated</a></li> <li><a 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</div> <div> <ul class="subNavList"> <li>Summary: </li> <li>Nested | </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> </ul> </div> <a name="skip-navbar_top">  </a></div>   <div class="header"> <div class="subTitle">org.apache.cassandra.io.sstable.metadata</div> <h2 title="Class MetadataCollector" class="title">Class MetadataCollector</h2> </div> <div class="contentContainer"> <ul class="inheritance"> <li>java.lang.Object</li> <li> <ul class="inheritance"> <li>org.apache.cassandra.io.sstable.metadata.MetadataCollector</li> </ul> </li> </ul> <div class="description"> <ul class="blockList"> <li class="blockList"> <hr> <br> <pre>public class <span class="strong">MetadataCollector</span> extends java.lang.Object</pre> </li> </ul> </div> <div class="summary"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="field_summary">  </a> <h3>Field Summary</h3> <table class="overviewSummary" 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>protected java.util.Set<java.lang.Integer></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#ancestors">ancestors</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected com.clearspring.analytics.stream.cardinality.ICardinality</code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#cardinality">cardinality</a></strong></code> <div class="block">Default cardinality estimation method is to use HyperLogLog++.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected double</code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#compressionRatio">compressionRatio</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected <a href="../../../../../../org/apache/cassandra/utils/EstimatedHistogram.html" title="class in org.apache.cassandra.utils">EstimatedHistogram</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#estimatedColumnCount">estimatedColumnCount</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected <a href="../../../../../../org/apache/cassandra/utils/EstimatedHistogram.html" title="class in org.apache.cassandra.utils">EstimatedHistogram</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#estimatedRowSize">estimatedRowSize</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected <a href="../../../../../../org/apache/cassandra/utils/StreamingHistogram.html" title="class in org.apache.cassandra.utils">StreamingHistogram</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#estimatedTombstoneDropTime">estimatedTombstoneDropTime</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected boolean</code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#hasLegacyCounterShards">hasLegacyCounterShards</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected java.util.List<java.nio.ByteBuffer></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#maxColumnNames">maxColumnNames</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected int</code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#maxLocalDeletionTime">maxLocalDeletionTime</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected long</code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#maxTimestamp">maxTimestamp</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected java.util.List<java.nio.ByteBuffer></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#minColumnNames">minColumnNames</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected long</code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#minTimestamp">minTimestamp</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static double</code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#NO_COMPRESSION_RATIO">NO_COMPRESSION_RATIO</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected <a href="../../../../../../org/apache/cassandra/db/commitlog/ReplayPosition.html" title="class in org.apache.cassandra.db.commitlog">ReplayPosition</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#replayPosition">replayPosition</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected int</code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#sstableLevel">sstableLevel</a></strong></code> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="constructor_summary">  </a> <h3>Constructor Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> <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><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#MetadataCollector(org.apache.cassandra.db.composites.CellNameType)">MetadataCollector</a></strong>(<a href="../../../../../../org/apache/cassandra/db/composites/CellNameType.html" title="interface in org.apache.cassandra.db.composites">CellNameType</a> columnNameComparator)</code> </td> </tr> <tr class="rowColor"> <td class="colOne"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#MetadataCollector(java.util.Collection,%20org.apache.cassandra.db.composites.CellNameType,%20int)">MetadataCollector</a></strong>(java.util.Collection<<a href="../../../../../../org/apache/cassandra/io/sstable/SSTableReader.html" title="class in org.apache.cassandra.io.sstable">SSTableReader</a>> sstables, <a href="../../../../../../org/apache/cassandra/db/composites/CellNameType.html" title="interface in org.apache.cassandra.db.composites">CellNameType</a> columnNameComparator, int level)</code> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_summary">  </a> <h3>Method Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> <caption><span>Methods</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Method and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#addAncestor(int)">addAncestor</a></strong>(int generation)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#addColumnCount(long)">addColumnCount</a></strong>(long columnCount)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#addCompressionRatio(long,%20long)">addCompressionRatio</a></strong>(long compressed, long uncompressed)</code> <div class="block">Ratio is compressed/uncompressed and it is if you have 1.x then compression isn't helping</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#addKey(java.nio.ByteBuffer)">addKey</a></strong>(java.nio.ByteBuffer key)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#addRowSize(long)">addRowSize</a></strong>(long rowSize)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <a href="../../../../../../org/apache/cassandra/io/sstable/metadata/StatsMetadata.html" title="class in org.apache.cassandra.io.sstable.metadata">StatsMetadata</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#defaultStatsMetadata()">defaultStatsMetadata</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#estimatedColumnCount(org.apache.cassandra.utils.EstimatedHistogram)">estimatedColumnCount</a></strong>(<a href="../../../../../../org/apache/cassandra/utils/EstimatedHistogram.html" title="class in org.apache.cassandra.utils">EstimatedHistogram</a> estimatedColumnCount)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#estimatedRowSize(org.apache.cassandra.utils.EstimatedHistogram)">estimatedRowSize</a></strong>(<a href="../../../../../../org/apache/cassandra/utils/EstimatedHistogram.html" title="class in org.apache.cassandra.utils">EstimatedHistogram</a> estimatedRowSize)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>java.util.Map<<a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataType.html" title="enum in org.apache.cassandra.io.sstable.metadata">MetadataType</a>,<a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataComponent.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataComponent</a>></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#finalizeMetadata(java.lang.String,%20double,%20long)">finalizeMetadata</a></strong>(java.lang.String partitioner, double bloomFilterFPChance, long repairedAt)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#mergeTombstoneHistogram(org.apache.cassandra.utils.StreamingHistogram)">mergeTombstoneHistogram</a></strong>(<a href="../../../../../../org/apache/cassandra/utils/StreamingHistogram.html" title="class in org.apache.cassandra.utils">StreamingHistogram</a> histogram)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#replayPosition(org.apache.cassandra.db.commitlog.ReplayPosition)">replayPosition</a></strong>(<a href="../../../../../../org/apache/cassandra/db/commitlog/ReplayPosition.html" title="class in org.apache.cassandra.db.commitlog">ReplayPosition</a> replayPosition)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#sstableLevel(int)">sstableLevel</a></strong>(int sstableLevel)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#update(long,%20org.apache.cassandra.io.sstable.ColumnStats)">update</a></strong>(long rowSize, <a href="../../../../../../org/apache/cassandra/io/sstable/ColumnStats.html" title="class in org.apache.cassandra.io.sstable">ColumnStats</a> stats)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#updateHasLegacyCounterShards(boolean)">updateHasLegacyCounterShards</a></strong>(boolean hasLegacyCounterShards)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#updateMaxColumnNames(java.util.List)">updateMaxColumnNames</a></strong>(java.util.List<java.nio.ByteBuffer> maxColumnNames)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#updateMaxLocalDeletionTime(int)">updateMaxLocalDeletionTime</a></strong>(int maxLocalDeletionTime)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#updateMaxTimestamp(long)">updateMaxTimestamp</a></strong>(long potentialMax)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#updateMinColumnNames(java.util.List)">updateMinColumnNames</a></strong>(java.util.List<java.nio.ByteBuffer> minColumnNames)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html" title="class in org.apache.cassandra.io.sstable.metadata">MetadataCollector</a></code></td> <td class="colLast"><code><strong><a href="../../../../../../org/apache/cassandra/io/sstable/metadata/MetadataCollector.html#updateMinTimestamp(long)">updateMinTimestamp</a></strong>(long potentialMin)</code> </td> </tr> </table> <ul class="blockList"> <li class="blockList"><a 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Parameter here(p=13, sp=25) should give reasonable estimation while lowering bytes required to hold information. 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