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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>package org.apache.hadoop.hbase.io.hfile;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.nio.ByteBuffer;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.NavigableMap;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.NavigableSet;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.concurrent.ConcurrentSkipListMap;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.concurrent.ConcurrentSkipListSet;<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.hbase.metrics.impl.FastLongHistogram;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.util.GsonUtil;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.slf4j.Logger;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.slf4j.LoggerFactory;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hbase.thirdparty.com.google.gson.Gson;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hbase.thirdparty.com.google.gson.TypeAdapter;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hbase.thirdparty.com.google.gson.stream.JsonReader;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span><a name="line.38"></a> |
| <span class="sourceLineNo">039</span>/**<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * Utilty for aggregating counts in CachedBlocks and toString/toJSON CachedBlocks and BlockCaches.<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * No attempt has been made at making this thread safe.<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> */<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>@InterfaceAudience.Private<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>public class BlockCacheUtil {<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> private static final Logger LOG = LoggerFactory.getLogger(BlockCacheUtil.class);<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> public static final long NANOS_PER_SECOND = 1000000000;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> /**<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * Needed generating JSON.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> */<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> private static final Gson GSON = GsonUtil.createGson()<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> .registerTypeAdapter(FastLongHistogram.class, new TypeAdapter<FastLongHistogram>() {<a name="line.54"></a> |
| <span class="sourceLineNo">055</span><a name="line.55"></a> |
| <span class="sourceLineNo">056</span> @Override<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> public void write(JsonWriter out, FastLongHistogram value) throws IOException {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> AgeSnapshot snapshot = new AgeSnapshot(value);<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> out.beginObject();<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> out.name("mean").value(snapshot.getMean());<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> out.name("min").value(snapshot.getMin());<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> out.name("max").value(snapshot.getMax());<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> out.name("75thPercentile").value(snapshot.get75thPercentile());<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> out.name("95thPercentile").value(snapshot.get95thPercentile());<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> out.name("98thPercentile").value(snapshot.get98thPercentile());<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> out.name("99thPercentile").value(snapshot.get99thPercentile());<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> out.name("999thPercentile").value(snapshot.get999thPercentile());<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> out.endObject();<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> }<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> @Override<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> public FastLongHistogram read(JsonReader in) throws IOException {<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> throw new UnsupportedOperationException();<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> }<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> }).setPrettyPrinting().create();<a name="line.75"></a> |
| <span class="sourceLineNo">076</span><a name="line.76"></a> |
| <span class="sourceLineNo">077</span> /** Returns The block content as String. */<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> public static String toString(final CachedBlock cb, final long now) {<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> return "filename=" + cb.getFilename() + ", " + toStringMinusFileName(cb, now);<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> }<a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> /**<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> * Little data structure to hold counts for a file. Used doing a toJSON.<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> */<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> static class CachedBlockCountsPerFile {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> private int count = 0;<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> private long size = 0;<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> private int countData = 0;<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> private long sizeData = 0;<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> private final String filename;<a name="line.90"></a> |
| <span class="sourceLineNo">091</span><a name="line.91"></a> |
| <span class="sourceLineNo">092</span> CachedBlockCountsPerFile(final String filename) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> this.filename = filename;<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> }<a name="line.94"></a> |
| <span class="sourceLineNo">095</span><a name="line.95"></a> |
| <span class="sourceLineNo">096</span> public int getCount() {<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> return count;<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> }<a name="line.98"></a> |
| <span class="sourceLineNo">099</span><a name="line.99"></a> |
| <span class="sourceLineNo">100</span> public long getSize() {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> return size;<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span><a name="line.103"></a> |
| <span class="sourceLineNo">104</span> public int getCountData() {<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> return countData;<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> }<a name="line.106"></a> |
| <span class="sourceLineNo">107</span><a name="line.107"></a> |
| <span class="sourceLineNo">108</span> public long getSizeData() {<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> return sizeData;<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> }<a name="line.110"></a> |
| <span class="sourceLineNo">111</span><a name="line.111"></a> |
| <span class="sourceLineNo">112</span> public String getFilename() {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> return filename;<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> }<a name="line.115"></a> |
| <span class="sourceLineNo">116</span><a name="line.116"></a> |
| <span class="sourceLineNo">117</span> /** Returns A JSON String of <code>filename</code> and counts of <code>blocks</code> */<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> public static String toJSON(String filename, NavigableSet<CachedBlock> blocks)<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> throws IOException {<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> CachedBlockCountsPerFile counts = new CachedBlockCountsPerFile(filename);<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> for (CachedBlock cb : blocks) {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> counts.count++;<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> counts.size += cb.getSize();<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> BlockType bt = cb.getBlockType();<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> if (bt != null && bt.isData()) {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> counts.countData++;<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> counts.sizeData += cb.getSize();<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> }<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> }<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> return GSON.toJson(counts);<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> }<a name="line.131"></a> |
| <span class="sourceLineNo">132</span><a name="line.132"></a> |
| <span class="sourceLineNo">133</span> /** Returns JSON string of <code>cbsf</code> aggregated */<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> public static String toJSON(CachedBlocksByFile cbsbf) throws IOException {<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> return GSON.toJson(cbsbf);<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> }<a name="line.136"></a> |
| <span class="sourceLineNo">137</span><a name="line.137"></a> |
| <span class="sourceLineNo">138</span> /** Returns JSON string of <code>bc</code> content. */<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> public static String toJSON(BlockCache bc) throws IOException {<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> return GSON.toJson(bc);<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> }<a name="line.141"></a> |
| <span class="sourceLineNo">142</span><a name="line.142"></a> |
| <span class="sourceLineNo">143</span> /** Returns The block content of <code>bc</code> as a String minus the filename. */<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> public static String toStringMinusFileName(final CachedBlock cb, final long now) {<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> return "offset=" + cb.getOffset() + ", size=" + cb.getSize() + ", age="<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> + (now - cb.getCachedTime()) + ", type=" + cb.getBlockType() + ", priority="<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> + cb.getBlockPriority();<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> }<a name="line.148"></a> |
| <span class="sourceLineNo">149</span><a name="line.149"></a> |
| <span class="sourceLineNo">150</span> /**<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> * Get a {@link CachedBlocksByFile} instance and load it up by iterating content in<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> * {@link BlockCache}.<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> * @param conf Used to read configurations<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> * @param bc Block Cache to iterate.<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> * @return Laoded up instance of CachedBlocksByFile<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> */<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> public static CachedBlocksByFile getLoadedCachedBlocksByFile(final Configuration conf,<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> final BlockCache bc) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> CachedBlocksByFile cbsbf = new CachedBlocksByFile(conf);<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> for (CachedBlock cb : bc) {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> if (cbsbf.update(cb)) break;<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> }<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> return cbsbf;<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> private static int compareCacheBlock(Cacheable left, Cacheable right,<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> boolean includeNextBlockMetadata) {<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> ByteBuffer l = ByteBuffer.allocate(left.getSerializedLength());<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> left.serialize(l, includeNextBlockMetadata);<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> ByteBuffer r = ByteBuffer.allocate(right.getSerializedLength());<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> right.serialize(r, includeNextBlockMetadata);<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> return Bytes.compareTo(l.array(), l.arrayOffset(), l.limit(), r.array(), r.arrayOffset(),<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> r.limit());<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> |
| <span class="sourceLineNo">177</span> * Validate that the existing and newBlock are the same without including the nextBlockMetadata,<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> * if not, throw an exception. If they are the same without the nextBlockMetadata, return the<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> * comparison.<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> * @param existing block that is existing in the cache.<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> * @param newBlock block that is trying to be cached.<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> * @param cacheKey the cache key of the blocks.<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> * @return comparison of the existing block to the newBlock.<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> */<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> public static int validateBlockAddition(Cacheable existing, Cacheable newBlock,<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> BlockCacheKey cacheKey) {<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> int comparison = compareCacheBlock(existing, newBlock, false);<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> if (comparison != 0) {<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> throw new RuntimeException(<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> "Cached block contents differ, which should not have happened." + "cacheKey:" + cacheKey);<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> }<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> if ((existing instanceof HFileBlock) && (newBlock instanceof HFileBlock)) {<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> comparison = ((HFileBlock) existing).getNextBlockOnDiskSize()<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> - ((HFileBlock) newBlock).getNextBlockOnDiskSize();<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> }<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> return comparison;<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> }<a name="line.197"></a> |
| <span class="sourceLineNo">198</span><a name="line.198"></a> |
| <span class="sourceLineNo">199</span> /**<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> * Because of the region splitting, it's possible that the split key locate in the middle of a<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> * block. So it's possible that both the daughter regions load the same block from their parent<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> * HFile. When pread, we don't force the read to read all of the next block header. So when two<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> * threads try to cache the same block, it's possible that one thread read all of the next block<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> * header but the other one didn't. if the already cached block hasn't next block header but the<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> * new block to cache has, then we can replace the existing block with the new block for better<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> * performance.(HBASE-20447)<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> * @param blockCache BlockCache to check<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> * @param cacheKey the block cache key<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> * @param newBlock the new block which try to put into the block cache.<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> * @return true means need to replace existing block with new block for the same block cache key.<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> * false means just keep the existing block.<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> */<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> public static boolean shouldReplaceExistingCacheBlock(BlockCache blockCache,<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> BlockCacheKey cacheKey, Cacheable newBlock) {<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> // NOTICE: The getBlock has retained the existingBlock inside.<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> Cacheable existingBlock = blockCache.getBlock(cacheKey, false, false, false);<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> if (existingBlock == null) {<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> return true;<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> }<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> try {<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> int comparison = BlockCacheUtil.validateBlockAddition(existingBlock, newBlock, cacheKey);<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> if (comparison < 0) {<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> LOG.warn("Cached block contents differ by nextBlockOnDiskSize, the new block has "<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> + "nextBlockOnDiskSize set. Caching new block.");<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> return true;<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> } else if (comparison > 0) {<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> LOG.warn("Cached block contents differ by nextBlockOnDiskSize, the existing block has "<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> + "nextBlockOnDiskSize set, Keeping cached block.");<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> return false;<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> } else {<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> LOG.debug("Caching an already cached block: {}. This is harmless and can happen in rare "<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> + "cases (see HBASE-8547)", cacheKey);<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> return false;<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> }<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> } finally {<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> // Release this block to decrement the reference count.<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> existingBlock.release();<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> }<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> }<a name="line.239"></a> |
| <span class="sourceLineNo">240</span><a name="line.240"></a> |
| <span class="sourceLineNo">241</span> private static final int DEFAULT_MAX = 1000000;<a name="line.241"></a> |
| <span class="sourceLineNo">242</span><a name="line.242"></a> |
| <span class="sourceLineNo">243</span> public static int getMaxCachedBlocksByFile(Configuration conf) {<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> return conf == null ? DEFAULT_MAX : conf.getInt("hbase.ui.blockcache.by.file.max", DEFAULT_MAX);<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span><a name="line.246"></a> |
| <span class="sourceLineNo">247</span> /**<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> * Use one of these to keep a running account of cached blocks by file. Throw it away when done.<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> * This is different than metrics in that it is stats on current state of a cache. See<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> * getLoadedCachedBlocksByFile<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> */<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> public static class CachedBlocksByFile {<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> private int count;<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> private int dataBlockCount;<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> private long size;<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> private long dataSize;<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> private final long now = System.nanoTime();<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> /**<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> * How many blocks to look at before we give up. There could be many millions of blocks. We<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> * don't want the ui to freeze while we run through 1B blocks... users will think hbase dead. UI<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> * displays warning in red when stats are incomplete.<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> */<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> private final int max;<a name="line.263"></a> |
| <span class="sourceLineNo">264</span><a name="line.264"></a> |
| <span class="sourceLineNo">265</span> CachedBlocksByFile() {<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> this(null);<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> }<a name="line.267"></a> |
| <span class="sourceLineNo">268</span><a name="line.268"></a> |
| <span class="sourceLineNo">269</span> CachedBlocksByFile(final Configuration c) {<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> this.max = getMaxCachedBlocksByFile(c);<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> }<a name="line.271"></a> |
| <span class="sourceLineNo">272</span><a name="line.272"></a> |
| <span class="sourceLineNo">273</span> /**<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> * Map by filename. use concurent utils because we want our Map and contained blocks sorted.<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> */<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> private transient NavigableMap<String, NavigableSet<CachedBlock>> cachedBlockByFile =<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> new ConcurrentSkipListMap<>();<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> FastLongHistogram hist = new FastLongHistogram();<a name="line.278"></a> |
| <span class="sourceLineNo">279</span><a name="line.279"></a> |
| <span class="sourceLineNo">280</span> /** Returns True if full.... if we won't be adding any more. */<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> public boolean update(final CachedBlock cb) {<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> if (isFull()) return true;<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> NavigableSet<CachedBlock> set = this.cachedBlockByFile.get(cb.getFilename());<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> if (set == null) {<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> set = new ConcurrentSkipListSet<>();<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> this.cachedBlockByFile.put(cb.getFilename(), set);<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> }<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> set.add(cb);<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> this.size += cb.getSize();<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> this.count++;<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> BlockType bt = cb.getBlockType();<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> if (bt != null && bt.isData()) {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> this.dataBlockCount++;<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> this.dataSize += cb.getSize();<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> }<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> long age = (this.now - cb.getCachedTime()) / NANOS_PER_SECOND;<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> this.hist.add(age, 1);<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> return false;<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> }<a name="line.299"></a> |
| <span class="sourceLineNo">300</span><a name="line.300"></a> |
| <span class="sourceLineNo">301</span> /**<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> * @return True if full; i.e. there are more items in the cache but we only loaded up the<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> * maximum set in configuration <code>hbase.ui.blockcache.by.file.max</code> (Default:<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> * DEFAULT_MAX).<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> */<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> public boolean isFull() {<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> return this.count >= this.max;<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> }<a name="line.308"></a> |
| <span class="sourceLineNo">309</span><a name="line.309"></a> |
| <span class="sourceLineNo">310</span> public NavigableMap<String, NavigableSet<CachedBlock>> getCachedBlockStatsByFile() {<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> return this.cachedBlockByFile;<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> }<a name="line.312"></a> |
| <span class="sourceLineNo">313</span><a name="line.313"></a> |
| <span class="sourceLineNo">314</span> /** Returns count of blocks in the cache */<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> public int getCount() {<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> return count;<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> }<a name="line.317"></a> |
| <span class="sourceLineNo">318</span><a name="line.318"></a> |
| <span class="sourceLineNo">319</span> public int getDataCount() {<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> return dataBlockCount;<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> }<a name="line.321"></a> |
| <span class="sourceLineNo">322</span><a name="line.322"></a> |
| <span class="sourceLineNo">323</span> /** Returns size of blocks in the cache */<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> public long getSize() {<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> return size;<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> }<a name="line.326"></a> |
| <span class="sourceLineNo">327</span><a name="line.327"></a> |
| <span class="sourceLineNo">328</span> /** Returns Size of data. */<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> public long getDataSize() {<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> return dataSize;<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> }<a name="line.331"></a> |
| <span class="sourceLineNo">332</span><a name="line.332"></a> |
| <span class="sourceLineNo">333</span> public AgeSnapshot getAgeInCacheSnapshot() {<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> return new AgeSnapshot(this.hist);<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> }<a name="line.335"></a> |
| <span class="sourceLineNo">336</span><a name="line.336"></a> |
| <span class="sourceLineNo">337</span> @Override<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> public String toString() {<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> AgeSnapshot snapshot = getAgeInCacheSnapshot();<a name="line.339"></a> |
| <span class="sourceLineNo">340</span> return "count=" + count + ", dataBlockCount=" + dataBlockCount + ", size=" + size<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> + ", dataSize=" + getDataSize() + ", mean age=" + snapshot.getMean() + ", min age="<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> + snapshot.getMin() + ", max age=" + snapshot.getMax() + ", 75th percentile age="<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> + snapshot.get75thPercentile() + ", 95th percentile age=" + snapshot.get95thPercentile()<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> + ", 98th percentile age=" + snapshot.get98thPercentile() + ", 99th percentile age="<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> + snapshot.get99thPercentile() + ", 99.9th percentile age=" + snapshot.get99thPercentile();<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> }<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> }<a name="line.347"></a> |
| <span class="sourceLineNo">348</span>}<a name="line.348"></a> |
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| </div> |
| </body> |
| </html> |
