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| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> *<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> *<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * limitations under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.regionserver;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.hadoop.hbase.Cell;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.CellComparator;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.CellUtil;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.util.ClassSize;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span><a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.io.IOException;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span><a name="line.28"></a> |
| <span class="sourceLineNo">029</span>/**<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> * CellArrayImmutableSegment extends the API supported by a {@link Segment},<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * and {@link ImmutableSegment}. This immutable segment is working with CellSet with<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> * CellArrayMap delegatee.<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> */<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>@InterfaceAudience.Private<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>public class CellArrayImmutableSegment extends ImmutableSegment {<a name="line.35"></a> |
| <span class="sourceLineNo">036</span><a name="line.36"></a> |
| <span class="sourceLineNo">037</span> public static final long DEEP_OVERHEAD_CAM = DEEP_OVERHEAD + ClassSize.CELL_ARRAY_MAP;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span><a name="line.38"></a> |
| <span class="sourceLineNo">039</span> ///////////////////// CONSTRUCTORS /////////////////////<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> /**------------------------------------------------------------------------<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * C-tor to be used when new CellArrayImmutableSegment is a result of compaction of a<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * list of older ImmutableSegments.<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * The given iterator returns the Cells that "survived" the compaction.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> */<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> protected CellArrayImmutableSegment(CellComparator comparator, MemStoreSegmentsIterator iterator,<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> MemStoreLAB memStoreLAB, int numOfCells, MemStoreCompactionStrategy.Action action) {<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> super(null, comparator, memStoreLAB); // initiailize the CellSet with NULL<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> incMemStoreSize(0, DEEP_OVERHEAD_CAM, 0, 0); // CAM is always on-heap<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> // build the new CellSet based on CellArrayMap and update the CellSet of the new Segment<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> initializeCellSet(numOfCells, iterator, action);<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> }<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> /**------------------------------------------------------------------------<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * C-tor to be used when new CellChunkImmutableSegment is built as a result of flattening<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * of CSLMImmutableSegment<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * The given iterator returns the Cells that "survived" the compaction.<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> */<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> protected CellArrayImmutableSegment(CSLMImmutableSegment segment, MemStoreSizing mss,<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> MemStoreCompactionStrategy.Action action) {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> super(segment); // initiailize the upper class<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> long indexOverhead = DEEP_OVERHEAD_CAM - CSLMImmutableSegment.DEEP_OVERHEAD_CSLM;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> incMemStoreSize(0, indexOverhead, 0, 0); // CAM is always on-heap<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> mss.incMemStoreSize(0, indexOverhead, 0, 0);<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> int numOfCells = segment.getCellsCount();<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> // build the new CellSet based on CellChunkMap and update the CellSet of this Segment<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> reinitializeCellSet(numOfCells, segment.getScanner(Long.MAX_VALUE), segment.getCellSet(),<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> action);<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> // arrange the meta-data size, decrease all meta-data sizes related to SkipList;<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> // add sizes of CellArrayMap entry (reinitializeCellSet doesn't take the care for the sizes)<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> long newSegmentSizeDelta =<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> numOfCells * (indexEntrySize() - ClassSize.CONCURRENT_SKIPLISTMAP_ENTRY);<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> incMemStoreSize(0, newSegmentSizeDelta, 0, 0);<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> mss.incMemStoreSize(0, newSegmentSizeDelta, 0, 0);<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> }<a name="line.74"></a> |
| <span class="sourceLineNo">075</span><a name="line.75"></a> |
| <span class="sourceLineNo">076</span> @Override<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> protected long indexEntrySize() {<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> return ClassSize.CELL_ARRAY_MAP_ENTRY;<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> }<a name="line.79"></a> |
| <span class="sourceLineNo">080</span><a name="line.80"></a> |
| <span class="sourceLineNo">081</span> @Override<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> protected boolean canBeFlattened() {<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> return false;<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> }<a name="line.84"></a> |
| <span class="sourceLineNo">085</span><a name="line.85"></a> |
| <span class="sourceLineNo">086</span> ///////////////////// PRIVATE METHODS /////////////////////<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> /*------------------------------------------------------------------------*/<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> // Create CellSet based on CellArrayMap from compacting iterator<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> private void initializeCellSet(int numOfCells, MemStoreSegmentsIterator iterator,<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> MemStoreCompactionStrategy.Action action) {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span><a name="line.91"></a> |
| <span class="sourceLineNo">092</span> boolean merge = (action == MemStoreCompactionStrategy.Action.MERGE ||<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> action == MemStoreCompactionStrategy.Action.MERGE_COUNT_UNIQUE_KEYS);<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> Cell[] cells = new Cell[numOfCells]; // build the Cell Array<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> int i = 0;<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> int numUniqueKeys=0;<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> Cell prev = null;<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> while (iterator.hasNext()) {<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> Cell c = iterator.next();<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> // The scanner behind the iterator is doing all the elimination logic<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> if (merge) {<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> // if this is merge we just move the Cell object without copying MSLAB<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> // the sizes still need to be updated in the new segment<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> cells[i] = c;<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> } else {<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> // now we just copy it to the new segment (also MSLAB copy)<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> cells[i] = maybeCloneWithAllocator(c, false);<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> }<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> // second parameter true, because in compaction/merge the addition of the cell to new segment<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> // is always successful<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> updateMetaInfo(cells[i], true, null); // updates the size per cell<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> if(action == MemStoreCompactionStrategy.Action.MERGE_COUNT_UNIQUE_KEYS) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> //counting number of unique keys<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> if (prev != null) {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> if (!CellUtil.matchingRowColumnBytes(prev, c)) {<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> numUniqueKeys++;<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> } else {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> numUniqueKeys++;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> }<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> }<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> prev = c;<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> i++;<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> if(action == MemStoreCompactionStrategy.Action.COMPACT) {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> numUniqueKeys = numOfCells;<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> } else if(action != MemStoreCompactionStrategy.Action.MERGE_COUNT_UNIQUE_KEYS) {<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> numUniqueKeys = CellSet.UNKNOWN_NUM_UNIQUES;<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> }<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> // build the immutable CellSet<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> CellArrayMap cam = new CellArrayMap(getComparator(), cells, 0, i, false);<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> this.setCellSet(null, new CellSet(cam, numUniqueKeys)); // update the CellSet of this Segment<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> }<a name="line.133"></a> |
| <span class="sourceLineNo">134</span><a name="line.134"></a> |
| <span class="sourceLineNo">135</span> /*------------------------------------------------------------------------*/<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> // Create CellSet based on CellChunkMap from current ConcurrentSkipListMap based CellSet<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> // (without compacting iterator)<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> // We do not consider cells bigger than chunks!<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> private void reinitializeCellSet(<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> int numOfCells, KeyValueScanner segmentScanner, CellSet oldCellSet,<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> MemStoreCompactionStrategy.Action action) {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> Cell[] cells = new Cell[numOfCells]; // build the Cell Array<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> Cell curCell;<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> int idx = 0;<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> int numUniqueKeys=0;<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> Cell prev = null;<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> try {<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> while ((curCell = segmentScanner.next()) != null) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> cells[idx++] = curCell;<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> if(action == MemStoreCompactionStrategy.Action.FLATTEN_COUNT_UNIQUE_KEYS) {<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> //counting number of unique keys<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> if (prev != null) {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> if (!CellUtil.matchingRowColumn(prev, curCell)) {<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> numUniqueKeys++;<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> }<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> } else {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> numUniqueKeys++;<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> }<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> }<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> prev = curCell;<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> }<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> } catch (IOException ie) {<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> throw new IllegalStateException(ie);<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> } finally {<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> segmentScanner.close();<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> }<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> if(action != MemStoreCompactionStrategy.Action.FLATTEN_COUNT_UNIQUE_KEYS) {<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> numUniqueKeys = CellSet.UNKNOWN_NUM_UNIQUES;<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> }<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> // build the immutable CellSet<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> CellArrayMap cam = new CellArrayMap(getComparator(), cells, 0, idx, false);<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> // update the CellSet of this Segment<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> this.setCellSet(oldCellSet, new CellSet(cam, numUniqueKeys));<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> }<a name="line.174"></a> |
| <span class="sourceLineNo">175</span><a name="line.175"></a> |
| <span class="sourceLineNo">176</span>}<a name="line.176"></a> |
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