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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<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 java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.InterruptedIOException;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.ArrayList;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span><a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.conf.Configuration;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.fs.Path;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.Cell;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HConstants;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.monitoring.MonitoredTask;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.regionserver.throttle.ThroughputControlUtil;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.regionserver.throttle.ThroughputController;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span><a name="line.34"></a> |
| <span class="sourceLineNo">035</span>/**<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * Store flusher interface. Turns a snapshot of memstore into a set of store files (usually one).<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * Custom implementation can be provided.<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> */<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>@InterfaceAudience.Private<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>abstract class StoreFlusher {<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> protected Configuration conf;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> protected HStore store;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span><a name="line.43"></a> |
| <span class="sourceLineNo">044</span> public StoreFlusher(Configuration conf, HStore store) {<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> this.conf = conf;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> this.store = store;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> }<a name="line.47"></a> |
| <span class="sourceLineNo">048</span><a name="line.48"></a> |
| <span class="sourceLineNo">049</span> /**<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * Turns a snapshot of memstore into a set of store files.<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * @param snapshot Memstore snapshot.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * @param cacheFlushSeqNum Log cache flush sequence number.<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * @param status Task that represents the flush operation and may be updated with status.<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * @param throughputController A controller to avoid flush too fast<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * @return List of files written. Can be empty; must not be null.<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> */<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> public abstract List<Path> flushSnapshot(MemStoreSnapshot snapshot, long cacheFlushSeqNum,<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> MonitoredTask status, ThroughputController throughputController,<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> FlushLifeCycleTracker tracker) throws IOException;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span><a name="line.60"></a> |
| <span class="sourceLineNo">061</span> protected void finalizeWriter(StoreFileWriter writer, long cacheFlushSeqNum,<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> MonitoredTask status) throws IOException {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> // Write out the log sequence number that corresponds to this output<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> // hfile. Also write current time in metadata as minFlushTime.<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> // The hfile is current up to and including cacheFlushSeqNum.<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> status.setStatus("Flushing " + store + ": appending metadata");<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> writer.appendMetadata(cacheFlushSeqNum, false);<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> status.setStatus("Flushing " + store + ": closing flushed file");<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> writer.close();<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> }<a name="line.70"></a> |
| <span class="sourceLineNo">071</span><a name="line.71"></a> |
| <span class="sourceLineNo">072</span><a name="line.72"></a> |
| <span class="sourceLineNo">073</span> /**<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * Creates the scanner for flushing snapshot. Also calls coprocessors.<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * @param snapshotScanners<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * @return The scanner; null if coprocessor is canceling the flush.<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> */<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> protected final InternalScanner createScanner(List<KeyValueScanner> snapshotScanners,<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> FlushLifeCycleTracker tracker) throws IOException {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> ScanInfo scanInfo;<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> if (store.getCoprocessorHost() != null) {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> scanInfo = store.getCoprocessorHost().preFlushScannerOpen(store, tracker);<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> } else {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> scanInfo = store.getScanInfo();<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> final long smallestReadPoint = store.getSmallestReadPoint();<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> InternalScanner scanner = new StoreScanner(store, scanInfo, snapshotScanners,<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> ScanType.COMPACT_RETAIN_DELETES, smallestReadPoint, HConstants.OLDEST_TIMESTAMP);<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> if (store.getCoprocessorHost() != null) {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> try {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> return store.getCoprocessorHost().preFlush(store, scanner, tracker);<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> } catch (IOException ioe) {<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> scanner.close();<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> throw ioe;<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> }<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> return scanner;<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> }<a name="line.99"></a> |
| <span class="sourceLineNo">100</span><a name="line.100"></a> |
| <span class="sourceLineNo">101</span> /**<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> * Performs memstore flush, writing data from scanner into sink.<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> * @param scanner Scanner to get data from.<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> * @param sink Sink to write data to. Could be StoreFile.Writer.<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> * @param throughputController A controller to avoid flush too fast<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> */<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> protected void performFlush(InternalScanner scanner, CellSink sink,<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> ThroughputController throughputController) throws IOException {<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> int compactionKVMax =<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> conf.getInt(HConstants.COMPACTION_KV_MAX, HConstants.COMPACTION_KV_MAX_DEFAULT);<a name="line.110"></a> |
| <span class="sourceLineNo">111</span><a name="line.111"></a> |
| <span class="sourceLineNo">112</span> ScannerContext scannerContext =<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> ScannerContext.newBuilder().setBatchLimit(compactionKVMax).build();<a name="line.113"></a> |
| <span class="sourceLineNo">114</span><a name="line.114"></a> |
| <span class="sourceLineNo">115</span> List<Cell> kvs = new ArrayList<>();<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> boolean hasMore;<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> String flushName = ThroughputControlUtil.getNameForThrottling(store, "flush");<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> // no control on system table (such as meta, namespace, etc) flush<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> boolean control =<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> throughputController != null && !store.getRegionInfo().getTable().isSystemTable();<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> if (control) {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> throughputController.start(flushName);<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> }<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> try {<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> do {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> hasMore = scanner.next(kvs, scannerContext);<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> if (!kvs.isEmpty()) {<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> for (Cell c : kvs) {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> sink.append(c);<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> if (control) {<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> throughputController.control(flushName, c.getSerializedSize());<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> }<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> }<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> kvs.clear();<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> }<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> } while (hasMore);<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> } catch (InterruptedException e) {<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> throw new InterruptedIOException(<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> "Interrupted while control throughput of flushing " + flushName);<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> } finally {<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> if (control) {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> throughputController.finish(flushName);<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> }<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> }<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> }<a name="line.145"></a> |
| <span class="sourceLineNo">146</span>}<a name="line.146"></a> |
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| </pre> |
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