devapidocs/org/apache/hadoop/hbase/regionserver/querymatcher/DropDeletesCompactionScanQueryMatcher.html - hbase-site - Git at Google

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 <div class="subTitle">org.apache.hadoop.hbase.regionserver.querymatcher</div>
 <h2 title="Class DropDeletesCompactionScanQueryMatcher" class="title">Class DropDeletesCompactionScanQueryMatcher</h2>
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 <li><a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/ScanQueryMatcher.html" title="class in org.apache.hadoop.hbase.regionserver.querymatcher">org.apache.hadoop.hbase.regionserver.querymatcher.ScanQueryMatcher</a></li>
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 <li><a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/CompactionScanQueryMatcher.html" title="class in org.apache.hadoop.hbase.regionserver.querymatcher">org.apache.hadoop.hbase.regionserver.querymatcher.CompactionScanQueryMatcher</a></li>
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 <dt>All Implemented Interfaces:</dt>
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 <dt>Direct Known Subclasses:</dt>
 <dd><a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/MajorCompactionScanQueryMatcher.html" title="class in org.apache.hadoop.hbase.regionserver.querymatcher">MajorCompactionScanQueryMatcher</a>, <a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/StripeCompactionScanQueryMatcher.html" title="class in org.apache.hadoop.hbase.regionserver.querymatcher">StripeCompactionScanQueryMatcher</a></dd>
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 <pre>@InterfaceAudience.Private
 public abstract class <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/querymatcher/DropDeletesCompactionScanQueryMatcher.html#line.29">DropDeletesCompactionScanQueryMatcher</a>
 extends <a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/CompactionScanQueryMatcher.html" title="class in org.apache.hadoop.hbase.regionserver.querymatcher">CompactionScanQueryMatcher</a></pre>
 <div class="block">A query matcher for compaction which can drop delete markers.</div>
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 <code><a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/ScanQueryMatcher.MatchCode.html" title="enum in org.apache.hadoop.hbase.regionserver.querymatcher">ScanQueryMatcher.MatchCode</a></code></li>
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 <td class="colFirst"><code>protected long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/DropDeletesCompactionScanQueryMatcher.html#earliestPutTs">earliestPutTs</a></span></code>
 <div class="block">Oldest put in any of the involved store files Used to decide whether it is ok to delete family
  delete marker of this store keeps deleted KVs.</div>
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 <td class="colFirst"><code>protected long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/DropDeletesCompactionScanQueryMatcher.html#timeToPurgeDeletes">timeToPurgeDeletes</a></span></code>
 <div class="block">By default, when hbase.hstore.time.to.purge.deletes is 0ms, a delete marker is always removed
  during a major compaction.</div>
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 <td class="colFirst"><code>protected </code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/DropDeletesCompactionScanQueryMatcher.html#DropDeletesCompactionScanQueryMatcher-org.apache.hadoop.hbase.regionserver.ScanInfo-org.apache.hadoop.hbase.regionserver.querymatcher.DeleteTracker-org.apache.hadoop.hbase.regionserver.querymatcher.ColumnTracker-long-long-long-long-">DropDeletesCompactionScanQueryMatcher</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanInfo.html" title="class in org.apache.hadoop.hbase.regionserver">ScanInfo</a>&nbsp;scanInfo,
                                      <a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/DeleteTracker.html" title="interface in org.apache.hadoop.hbase.regionserver.querymatcher">DeleteTracker</a>&nbsp;deletes,
                                      <a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/ColumnTracker.html" title="interface in org.apache.hadoop.hbase.regionserver.querymatcher">ColumnTracker</a>&nbsp;columns,
                                      long&nbsp;readPointToUse,
                                      long&nbsp;earliestPutTs,
                                      long&nbsp;oldestUnexpiredTS,
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 <td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/ScanQueryMatcher.MatchCode.html" title="enum in org.apache.hadoop.hbase.regionserver.querymatcher">ScanQueryMatcher.MatchCode</a></code></td>
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 <h4>timeToPurgeDeletes</h4>
 <pre>protected final&nbsp;long <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/querymatcher/DropDeletesCompactionScanQueryMatcher.html#line.47">timeToPurgeDeletes</a></pre>
 <div class="block">By default, when hbase.hstore.time.to.purge.deletes is 0ms, a delete marker is always removed
  during a major compaction. If set to non-zero value then major compaction will try to keep a
  delete marker around for the given number of milliseconds. We want to keep the delete markers
  around a bit longer because old puts might appear out-of-order. For example, during log
  replication between two clusters.
  <p>
  If the delete marker has lived longer than its column-family's TTL then the delete marker will
  be removed even if time.to.purge.deletes has not passed. This is because all the Puts that this
  delete marker can influence would have also expired. (Removing of delete markers on col family
  TTL will not happen if min-versions is set to non-zero)
  <p>
  But, if time.to.purge.deletes has not expired then a delete marker will not be removed just
  because there are no Puts that it is currently influencing. This is because Puts, that this
  delete can influence. may appear out of order.</div>
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 <h4>earliestPutTs</h4>
 <pre>protected final&nbsp;long <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/querymatcher/DropDeletesCompactionScanQueryMatcher.html#line.53">earliestPutTs</a></pre>
 <div class="block">Oldest put in any of the involved store files Used to decide whether it is ok to delete family
  delete marker of this store keeps deleted KVs.</div>
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 <h4>DropDeletesCompactionScanQueryMatcher</h4>
 <pre>protected&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/querymatcher/DropDeletesCompactionScanQueryMatcher.html#line.55">DropDeletesCompactionScanQueryMatcher</a>(<a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanInfo.html" title="class in org.apache.hadoop.hbase.regionserver">ScanInfo</a>&nbsp;scanInfo,
                                                 <a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/DeleteTracker.html" title="interface in org.apache.hadoop.hbase.regionserver.querymatcher">DeleteTracker</a>&nbsp;deletes,
                                                 <a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/ColumnTracker.html" title="interface in org.apache.hadoop.hbase.regionserver.querymatcher">ColumnTracker</a>&nbsp;columns,
                                                 long&nbsp;readPointToUse,
                                                 long&nbsp;earliestPutTs,
                                                 long&nbsp;oldestUnexpiredTS,
                                                 long&nbsp;now)</pre>
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 <pre>protected final&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/regionserver/querymatcher/ScanQueryMatcher.MatchCode.html" title="enum in org.apache.hadoop.hbase.regionserver.querymatcher">ScanQueryMatcher.MatchCode</a>&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/querymatcher/DropDeletesCompactionScanQueryMatcher.html#line.63">tryDropDelete</a>(<a href="../../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a>&nbsp;cell)</pre>
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