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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.regionserver.querymatcher;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">021</span><span id="line-21">import org.apache.hadoop.hbase.KeepDeletedCells;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.regionserver.ScanInfo;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">024</span><span id="line-24"></span> |
| <span class="source-line-no">025</span><span id="line-25">/**</span> |
| <span class="source-line-no">026</span><span id="line-26"> * A query matcher for compaction which can drop delete markers.</span> |
| <span class="source-line-no">027</span><span id="line-27"> */</span> |
| <span class="source-line-no">028</span><span id="line-28">@InterfaceAudience.Private</span> |
| <span class="source-line-no">029</span><span id="line-29">public abstract class DropDeletesCompactionScanQueryMatcher extends CompactionScanQueryMatcher {</span> |
| <span class="source-line-no">030</span><span id="line-30"></span> |
| <span class="source-line-no">031</span><span id="line-31"> /**</span> |
| <span class="source-line-no">032</span><span id="line-32"> * By default, when hbase.hstore.time.to.purge.deletes is 0ms, a delete marker is always removed</span> |
| <span class="source-line-no">033</span><span id="line-33"> * during a major compaction. If set to non-zero value then major compaction will try to keep a</span> |
| <span class="source-line-no">034</span><span id="line-34"> * delete marker around for the given number of milliseconds. We want to keep the delete markers</span> |
| <span class="source-line-no">035</span><span id="line-35"> * around a bit longer because old puts might appear out-of-order. For example, during log</span> |
| <span class="source-line-no">036</span><span id="line-36"> * replication between two clusters.</span> |
| <span class="source-line-no">037</span><span id="line-37"> * <p></span> |
| <span class="source-line-no">038</span><span id="line-38"> * If the delete marker has lived longer than its column-family's TTL then the delete marker will</span> |
| <span class="source-line-no">039</span><span id="line-39"> * be removed even if time.to.purge.deletes has not passed. This is because all the Puts that this</span> |
| <span class="source-line-no">040</span><span id="line-40"> * delete marker can influence would have also expired. (Removing of delete markers on col family</span> |
| <span class="source-line-no">041</span><span id="line-41"> * TTL will not happen if min-versions is set to non-zero)</span> |
| <span class="source-line-no">042</span><span id="line-42"> * <p></span> |
| <span class="source-line-no">043</span><span id="line-43"> * But, if time.to.purge.deletes has not expired then a delete marker will not be removed just</span> |
| <span class="source-line-no">044</span><span id="line-44"> * because there are no Puts that it is currently influencing. This is because Puts, that this</span> |
| <span class="source-line-no">045</span><span id="line-45"> * delete can influence. may appear out of order.</span> |
| <span class="source-line-no">046</span><span id="line-46"> */</span> |
| <span class="source-line-no">047</span><span id="line-47"> protected final long timeToPurgeDeletes;</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49"> /**</span> |
| <span class="source-line-no">050</span><span id="line-50"> * Oldest put in any of the involved store files Used to decide whether it is ok to delete family</span> |
| <span class="source-line-no">051</span><span id="line-51"> * delete marker of this store keeps deleted KVs.</span> |
| <span class="source-line-no">052</span><span id="line-52"> */</span> |
| <span class="source-line-no">053</span><span id="line-53"> protected final long earliestPutTs;</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> protected DropDeletesCompactionScanQueryMatcher(ScanInfo scanInfo, DeleteTracker deletes,</span> |
| <span class="source-line-no">056</span><span id="line-56"> ColumnTracker columns, long readPointToUse, long earliestPutTs, long oldestUnexpiredTS,</span> |
| <span class="source-line-no">057</span><span id="line-57"> long now) {</span> |
| <span class="source-line-no">058</span><span id="line-58"> super(scanInfo, deletes, columns, readPointToUse, oldestUnexpiredTS, now);</span> |
| <span class="source-line-no">059</span><span id="line-59"> this.timeToPurgeDeletes = scanInfo.getTimeToPurgeDeletes();</span> |
| <span class="source-line-no">060</span><span id="line-60"> this.earliestPutTs = earliestPutTs;</span> |
| <span class="source-line-no">061</span><span id="line-61"> }</span> |
| <span class="source-line-no">062</span><span id="line-62"></span> |
| <span class="source-line-no">063</span><span id="line-63"> protected final MatchCode tryDropDelete(ExtendedCell cell) {</span> |
| <span class="source-line-no">064</span><span id="line-64"> long timestamp = cell.getTimestamp();</span> |
| <span class="source-line-no">065</span><span id="line-65"> // If it is not the time to drop the delete marker, just return</span> |
| <span class="source-line-no">066</span><span id="line-66"> if (timeToPurgeDeletes > 0 && now - timestamp <= timeToPurgeDeletes) {</span> |
| <span class="source-line-no">067</span><span id="line-67"> return MatchCode.INCLUDE;</span> |
| <span class="source-line-no">068</span><span id="line-68"> }</span> |
| <span class="source-line-no">069</span><span id="line-69"> if (</span> |
| <span class="source-line-no">070</span><span id="line-70"> keepDeletedCells == KeepDeletedCells.TRUE</span> |
| <span class="source-line-no">071</span><span id="line-71"> || (keepDeletedCells == KeepDeletedCells.TTL && timestamp >= oldestUnexpiredTS)</span> |
| <span class="source-line-no">072</span><span id="line-72"> ) {</span> |
| <span class="source-line-no">073</span><span id="line-73"> // If keepDeletedCell is true, or the delete marker is not expired yet, we should include it</span> |
| <span class="source-line-no">074</span><span id="line-74"> // in version counting to see if we can drop it. The only exception is that, we can make</span> |
| <span class="source-line-no">075</span><span id="line-75"> // sure that no put is older than this delete marker. And under this situation, all later</span> |
| <span class="source-line-no">076</span><span id="line-76"> // cells of this column(must be delete markers) can be skipped.</span> |
| <span class="source-line-no">077</span><span id="line-77"> if (timestamp < earliestPutTs) {</span> |
| <span class="source-line-no">078</span><span id="line-78"> return columns.getNextRowOrNextColumn(cell);</span> |
| <span class="source-line-no">079</span><span id="line-79"> } else {</span> |
| <span class="source-line-no">080</span><span id="line-80"> return null;</span> |
| <span class="source-line-no">081</span><span id="line-81"> }</span> |
| <span class="source-line-no">082</span><span id="line-82"> } else {</span> |
| <span class="source-line-no">083</span><span id="line-83"> return MatchCode.SKIP;</span> |
| <span class="source-line-no">084</span><span id="line-84"> }</span> |
| <span class="source-line-no">085</span><span id="line-85"> }</span> |
| <span class="source-line-no">086</span><span id="line-86">}</span> |
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