http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1f2eeb22/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html index b7c24d7..eecd2f9 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html @@ -44,792 +44,792 @@ <span class="sourceLineNo">036</span>import java.util.List;<a name="line.36"></a> <span class="sourceLineNo">037</span>import java.util.Map;<a name="line.37"></a> <span class="sourceLineNo">038</span>import java.util.NavigableSet;<a name="line.38"></a> -<span class="sourceLineNo">039</span>import java.util.Objects;<a name="line.39"></a> -<span class="sourceLineNo">040</span>import java.util.PriorityQueue;<a name="line.40"></a> -<span class="sourceLineNo">041</span>import java.util.Set;<a name="line.41"></a> -<span class="sourceLineNo">042</span>import java.util.concurrent.ArrayBlockingQueue;<a name="line.42"></a> -<span class="sourceLineNo">043</span>import java.util.concurrent.BlockingQueue;<a name="line.43"></a> -<span class="sourceLineNo">044</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.44"></a> -<span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentMap;<a name="line.45"></a> -<span class="sourceLineNo">046</span>import java.util.concurrent.ConcurrentSkipListSet;<a name="line.46"></a> -<span class="sourceLineNo">047</span>import java.util.concurrent.Executors;<a name="line.47"></a> -<span class="sourceLineNo">048</span>import java.util.concurrent.ScheduledExecutorService;<a name="line.48"></a> -<span class="sourceLineNo">049</span>import java.util.concurrent.TimeUnit;<a name="line.49"></a> -<span class="sourceLineNo">050</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.50"></a> -<span class="sourceLineNo">051</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.51"></a> -<span class="sourceLineNo">052</span>import java.util.concurrent.atomic.LongAdder;<a name="line.52"></a> -<span class="sourceLineNo">053</span>import java.util.concurrent.locks.Lock;<a name="line.53"></a> -<span class="sourceLineNo">054</span>import java.util.concurrent.locks.ReentrantLock;<a name="line.54"></a> -<span class="sourceLineNo">055</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.55"></a> -<span class="sourceLineNo">056</span>import org.apache.hadoop.conf.Configuration;<a name="line.56"></a> -<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.57"></a> -<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.io.HeapSize;<a name="line.58"></a> -<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.io.hfile.BlockCache;<a name="line.59"></a> -<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.60"></a> -<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheUtil;<a name="line.61"></a> -<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.io.hfile.BlockPriority;<a name="line.62"></a> -<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.io.hfile.BlockType;<a name="line.63"></a> -<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.io.hfile.CacheStats;<a name="line.64"></a> -<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.io.hfile.Cacheable;<a name="line.65"></a> -<span class="sourceLineNo">066</span>import org.apache.hadoop.hbase.io.hfile.Cacheable.MemoryType;<a name="line.66"></a> -<span class="sourceLineNo">067</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializer;<a name="line.67"></a> -<span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializerIdManager;<a name="line.68"></a> -<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.io.hfile.CachedBlock;<a name="line.69"></a> -<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.io.hfile.HFileBlock;<a name="line.70"></a> -<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.71"></a> -<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.72"></a> -<span class="sourceLineNo">073</span>import org.apache.hadoop.hbase.util.HasThread;<a name="line.73"></a> -<span class="sourceLineNo">074</span>import org.apache.hadoop.hbase.util.IdReadWriteLock;<a name="line.74"></a> -<span class="sourceLineNo">075</span>import org.apache.hadoop.hbase.util.IdReadWriteLock.ReferenceType;<a name="line.75"></a> -<span class="sourceLineNo">076</span>import org.apache.hadoop.util.StringUtils;<a name="line.76"></a> -<span class="sourceLineNo">077</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.77"></a> -<span class="sourceLineNo">078</span>import org.slf4j.Logger;<a name="line.78"></a> -<span class="sourceLineNo">079</span>import org.slf4j.LoggerFactory;<a name="line.79"></a> -<span class="sourceLineNo">080</span><a name="line.80"></a> -<span class="sourceLineNo">081</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.81"></a> -<span class="sourceLineNo">082</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.82"></a> -<span class="sourceLineNo">083</span>import org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;<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> * BucketCache uses {@link BucketAllocator} to allocate/free blocks, and uses<a name="line.86"></a> -<span class="sourceLineNo">087</span> * BucketCache#ramCache and BucketCache#backingMap in order to<a name="line.87"></a> -<span class="sourceLineNo">088</span> * determine if a given element is in the cache. The bucket cache can use on-heap or<a name="line.88"></a> -<span class="sourceLineNo">089</span> * off-heap memory {@link ByteBufferIOEngine} or in a file {@link FileIOEngine} to<a name="line.89"></a> -<span class="sourceLineNo">090</span> * store/read the block data.<a name="line.90"></a> -<span class="sourceLineNo">091</span> *<a name="line.91"></a> -<span class="sourceLineNo">092</span> * <p>Eviction is via a similar algorithm as used in<a name="line.92"></a> -<span class="sourceLineNo">093</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache}<a name="line.93"></a> -<span class="sourceLineNo">094</span> *<a name="line.94"></a> -<span class="sourceLineNo">095</span> * <p>BucketCache can be used as mainly a block cache (see<a name="line.95"></a> -<span class="sourceLineNo">096</span> * {@link org.apache.hadoop.hbase.io.hfile.CombinedBlockCache}), combined with<a name="line.96"></a> -<span class="sourceLineNo">097</span> * LruBlockCache to decrease CMS GC and heap fragmentation.<a name="line.97"></a> -<span class="sourceLineNo">098</span> *<a name="line.98"></a> -<span class="sourceLineNo">099</span> * <p>It also can be used as a secondary cache (e.g. using a file on ssd/fusionio to store<a name="line.99"></a> -<span class="sourceLineNo">100</span> * blocks) to enlarge cache space via<a name="line.100"></a> -<span class="sourceLineNo">101</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache#setVictimCache}<a name="line.101"></a> -<span class="sourceLineNo">102</span> */<a name="line.102"></a> -<span class="sourceLineNo">103</span>@InterfaceAudience.Private<a name="line.103"></a> -<span class="sourceLineNo">104</span>public class BucketCache implements BlockCache, HeapSize {<a name="line.104"></a> -<span class="sourceLineNo">105</span> private static final Logger LOG = LoggerFactory.getLogger(BucketCache.class);<a name="line.105"></a> -<span class="sourceLineNo">106</span><a name="line.106"></a> -<span class="sourceLineNo">107</span> /** Priority buckets config */<a name="line.107"></a> -<span class="sourceLineNo">108</span> static final String SINGLE_FACTOR_CONFIG_NAME = "hbase.bucketcache.single.factor";<a name="line.108"></a> -<span class="sourceLineNo">109</span> static final String MULTI_FACTOR_CONFIG_NAME = "hbase.bucketcache.multi.factor";<a name="line.109"></a> -<span class="sourceLineNo">110</span> static final String MEMORY_FACTOR_CONFIG_NAME = "hbase.bucketcache.memory.factor";<a name="line.110"></a> -<span class="sourceLineNo">111</span> static final String EXTRA_FREE_FACTOR_CONFIG_NAME = "hbase.bucketcache.extrafreefactor";<a name="line.111"></a> -<span class="sourceLineNo">112</span> static final String ACCEPT_FACTOR_CONFIG_NAME = "hbase.bucketcache.acceptfactor";<a name="line.112"></a> -<span class="sourceLineNo">113</span> static final String MIN_FACTOR_CONFIG_NAME = "hbase.bucketcache.minfactor";<a name="line.113"></a> -<span class="sourceLineNo">114</span><a name="line.114"></a> -<span class="sourceLineNo">115</span> /** Priority buckets */<a name="line.115"></a> -<span class="sourceLineNo">116</span> @VisibleForTesting<a name="line.116"></a> -<span class="sourceLineNo">117</span> static final float DEFAULT_SINGLE_FACTOR = 0.25f;<a name="line.117"></a> -<span class="sourceLineNo">118</span> static final float DEFAULT_MULTI_FACTOR = 0.50f;<a name="line.118"></a> -<span class="sourceLineNo">119</span> static final float DEFAULT_MEMORY_FACTOR = 0.25f;<a name="line.119"></a> -<span class="sourceLineNo">120</span> static final float DEFAULT_MIN_FACTOR = 0.85f;<a name="line.120"></a> -<span class="sourceLineNo">121</span><a name="line.121"></a> -<span class="sourceLineNo">122</span> private static final float DEFAULT_EXTRA_FREE_FACTOR = 0.10f;<a name="line.122"></a> -<span class="sourceLineNo">123</span> private static final float DEFAULT_ACCEPT_FACTOR = 0.95f;<a name="line.123"></a> -<span class="sourceLineNo">124</span><a name="line.124"></a> -<span class="sourceLineNo">125</span> // Number of blocks to clear for each of the bucket size that is full<a name="line.125"></a> -<span class="sourceLineNo">126</span> private static final int DEFAULT_FREE_ENTIRE_BLOCK_FACTOR = 2;<a name="line.126"></a> -<span class="sourceLineNo">127</span><a name="line.127"></a> -<span class="sourceLineNo">128</span> /** Statistics thread */<a name="line.128"></a> -<span class="sourceLineNo">129</span> private static final int statThreadPeriod = 5 * 60;<a name="line.129"></a> -<span class="sourceLineNo">130</span><a name="line.130"></a> -<span class="sourceLineNo">131</span> final static int DEFAULT_WRITER_THREADS = 3;<a name="line.131"></a> -<span class="sourceLineNo">132</span> final static int DEFAULT_WRITER_QUEUE_ITEMS = 64;<a name="line.132"></a> -<span class="sourceLineNo">133</span><a name="line.133"></a> -<span class="sourceLineNo">134</span> // Store/read block data<a name="line.134"></a> -<span class="sourceLineNo">135</span> final IOEngine ioEngine;<a name="line.135"></a> -<span class="sourceLineNo">136</span><a name="line.136"></a> -<span class="sourceLineNo">137</span> // Store the block in this map before writing it to cache<a name="line.137"></a> -<span class="sourceLineNo">138</span> @VisibleForTesting<a name="line.138"></a> -<span class="sourceLineNo">139</span> final ConcurrentMap<BlockCacheKey, RAMQueueEntry> ramCache;<a name="line.139"></a> -<span class="sourceLineNo">140</span> // In this map, store the block's meta data like offset, length<a name="line.140"></a> -<span class="sourceLineNo">141</span> @VisibleForTesting<a name="line.141"></a> -<span class="sourceLineNo">142</span> ConcurrentMap<BlockCacheKey, BucketEntry> backingMap;<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> * Flag if the cache is enabled or not... We shut it off if there are IO<a name="line.145"></a> -<span class="sourceLineNo">146</span> * errors for some time, so that Bucket IO exceptions/errors don't bring down<a name="line.146"></a> -<span class="sourceLineNo">147</span> * the HBase server.<a name="line.147"></a> -<span class="sourceLineNo">148</span> */<a name="line.148"></a> -<span class="sourceLineNo">149</span> private volatile boolean cacheEnabled;<a name="line.149"></a> -<span class="sourceLineNo">150</span><a name="line.150"></a> -<span class="sourceLineNo">151</span> /**<a name="line.151"></a> -<span class="sourceLineNo">152</span> * A list of writer queues. We have a queue per {@link WriterThread} we have running.<a name="line.152"></a> -<span class="sourceLineNo">153</span> * In other words, the work adding blocks to the BucketCache is divided up amongst the<a name="line.153"></a> -<span class="sourceLineNo">154</span> * running WriterThreads. Its done by taking hash of the cache key modulo queue count.<a name="line.154"></a> -<span class="sourceLineNo">155</span> * WriterThread when it runs takes whatever has been recently added and 'drains' the entries<a name="line.155"></a> -<span class="sourceLineNo">156</span> * to the BucketCache. It then updates the ramCache and backingMap accordingly.<a name="line.156"></a> -<span class="sourceLineNo">157</span> */<a name="line.157"></a> -<span class="sourceLineNo">158</span> @VisibleForTesting<a name="line.158"></a> -<span class="sourceLineNo">159</span> final ArrayList<BlockingQueue<RAMQueueEntry>> writerQueues = new ArrayList<>();<a name="line.159"></a> -<span class="sourceLineNo">160</span> @VisibleForTesting<a name="line.160"></a> -<span class="sourceLineNo">161</span> final WriterThread[] writerThreads;<a name="line.161"></a> -<span class="sourceLineNo">162</span><a name="line.162"></a> -<span class="sourceLineNo">163</span> /** Volatile boolean to track if free space is in process or not */<a name="line.163"></a> -<span class="sourceLineNo">164</span> private volatile boolean freeInProgress = false;<a name="line.164"></a> -<span class="sourceLineNo">165</span> private final Lock freeSpaceLock = new ReentrantLock();<a name="line.165"></a> -<span class="sourceLineNo">166</span><a name="line.166"></a> -<span class="sourceLineNo">167</span> private UniqueIndexMap<Integer> deserialiserMap = new UniqueIndexMap<>();<a name="line.167"></a> -<span class="sourceLineNo">168</span><a name="line.168"></a> -<span class="sourceLineNo">169</span> private final LongAdder realCacheSize = new LongAdder();<a name="line.169"></a> -<span class="sourceLineNo">170</span> private final LongAdder heapSize = new LongAdder();<a name="line.170"></a> -<span class="sourceLineNo">171</span> /** Current number of cached elements */<a name="line.171"></a> -<span class="sourceLineNo">172</span> private final LongAdder blockNumber = new LongAdder();<a name="line.172"></a> -<span class="sourceLineNo">173</span><a name="line.173"></a> -<span class="sourceLineNo">174</span> /** Cache access count (sequential ID) */<a name="line.174"></a> -<span class="sourceLineNo">175</span> private final AtomicLong accessCount = new AtomicLong();<a name="line.175"></a> -<span class="sourceLineNo">176</span><a name="line.176"></a> -<span class="sourceLineNo">177</span> private static final int DEFAULT_CACHE_WAIT_TIME = 50;<a name="line.177"></a> -<span class="sourceLineNo">178</span> // Used in test now. If the flag is false and the cache speed is very fast,<a name="line.178"></a> -<span class="sourceLineNo">179</span> // bucket cache will skip some blocks when caching. If the flag is true, we<a name="line.179"></a> -<span class="sourceLineNo">180</span> // will wait blocks flushed to IOEngine for some time when caching<a name="line.180"></a> -<span class="sourceLineNo">181</span> boolean wait_when_cache = false;<a name="line.181"></a> -<span class="sourceLineNo">182</span><a name="line.182"></a> -<span class="sourceLineNo">183</span> private final BucketCacheStats cacheStats = new BucketCacheStats();<a name="line.183"></a> -<span class="sourceLineNo">184</span><a name="line.184"></a> -<span class="sourceLineNo">185</span> private final String persistencePath;<a name="line.185"></a> -<span class="sourceLineNo">186</span> private final long cacheCapacity;<a name="line.186"></a> -<span class="sourceLineNo">187</span> /** Approximate block size */<a name="line.187"></a> -<span class="sourceLineNo">188</span> private final long blockSize;<a name="line.188"></a> -<span class="sourceLineNo">189</span><a name="line.189"></a> -<span class="sourceLineNo">190</span> /** Duration of IO errors tolerated before we disable cache, 1 min as default */<a name="line.190"></a> -<span class="sourceLineNo">191</span> private final int ioErrorsTolerationDuration;<a name="line.191"></a> -<span class="sourceLineNo">192</span> // 1 min<a name="line.192"></a> -<span class="sourceLineNo">193</span> public static final int DEFAULT_ERROR_TOLERATION_DURATION = 60 * 1000;<a name="line.193"></a> -<span class="sourceLineNo">194</span><a name="line.194"></a> -<span class="sourceLineNo">195</span> // Start time of first IO error when reading or writing IO Engine, it will be<a name="line.195"></a> -<span class="sourceLineNo">196</span> // reset after a successful read/write.<a name="line.196"></a> -<span class="sourceLineNo">197</span> private volatile long ioErrorStartTime = -1;<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> * A ReentrantReadWriteLock to lock on a particular block identified by offset.<a name="line.200"></a> -<span class="sourceLineNo">201</span> * The purpose of this is to avoid freeing the block which is being read.<a name="line.201"></a> -<span class="sourceLineNo">202</span> * <p><a name="line.202"></a> -<span class="sourceLineNo">203</span> * Key set of offsets in BucketCache is limited so soft reference is the best choice here.<a name="line.203"></a> -<span class="sourceLineNo">204</span> */<a name="line.204"></a> -<span class="sourceLineNo">205</span> @VisibleForTesting<a name="line.205"></a> -<span class="sourceLineNo">206</span> final IdReadWriteLock offsetLock = new IdReadWriteLock(ReferenceType.SOFT);<a name="line.206"></a> -<span class="sourceLineNo">207</span><a name="line.207"></a> -<span class="sourceLineNo">208</span> private final NavigableSet<BlockCacheKey> blocksByHFile =<a name="line.208"></a> -<span class="sourceLineNo">209</span> new ConcurrentSkipListSet<>(new Comparator<BlockCacheKey>() {<a name="line.209"></a> -<span class="sourceLineNo">210</span> @Override<a name="line.210"></a> -<span class="sourceLineNo">211</span> public int compare(BlockCacheKey a, BlockCacheKey b) {<a name="line.211"></a> -<span class="sourceLineNo">212</span> int nameComparison = a.getHfileName().compareTo(b.getHfileName());<a name="line.212"></a> -<span class="sourceLineNo">213</span> if (nameComparison != 0) {<a name="line.213"></a> -<span class="sourceLineNo">214</span> return nameComparison;<a name="line.214"></a> -<span class="sourceLineNo">215</span> }<a name="line.215"></a> -<span class="sourceLineNo">216</span><a name="line.216"></a> -<span class="sourceLineNo">217</span> if (a.getOffset() == b.getOffset()) {<a name="line.217"></a> -<span class="sourceLineNo">218</span> return 0;<a name="line.218"></a> -<span class="sourceLineNo">219</span> } else if (a.getOffset() < b.getOffset()) {<a name="line.219"></a> -<span class="sourceLineNo">220</span> return -1;<a name="line.220"></a> -<span class="sourceLineNo">221</span> }<a name="line.221"></a> -<span class="sourceLineNo">222</span> return 1;<a name="line.222"></a> -<span class="sourceLineNo">223</span> }<a name="line.223"></a> -<span class="sourceLineNo">224</span> });<a name="line.224"></a> -<span class="sourceLineNo">225</span><a name="line.225"></a> -<span class="sourceLineNo">226</span> /** Statistics thread schedule pool (for heavy debugging, could remove) */<a name="line.226"></a> -<span class="sourceLineNo">227</span> private final ScheduledExecutorService scheduleThreadPool = Executors.newScheduledThreadPool(1,<a name="line.227"></a> -<span class="sourceLineNo">228</span> new ThreadFactoryBuilder().setNameFormat("BucketCacheStatsExecutor").setDaemon(true).build());<a name="line.228"></a> -<span class="sourceLineNo">229</span><a name="line.229"></a> -<span class="sourceLineNo">230</span> // Allocate or free space for the block<a name="line.230"></a> -<span class="sourceLineNo">231</span> private BucketAllocator bucketAllocator;<a name="line.231"></a> -<span class="sourceLineNo">232</span><a name="line.232"></a> -<span class="sourceLineNo">233</span> /** Acceptable size of cache (no evictions if size < acceptable) */<a name="line.233"></a> -<span class="sourceLineNo">234</span> private float acceptableFactor;<a name="line.234"></a> -<span class="sourceLineNo">235</span><a name="line.235"></a> -<span class="sourceLineNo">236</span> /** Minimum threshold of cache (when evicting, evict until size < min) */<a name="line.236"></a> -<span class="sourceLineNo">237</span> private float minFactor;<a name="line.237"></a> -<span class="sourceLineNo">238</span><a name="line.238"></a> -<span class="sourceLineNo">239</span> /** Free this floating point factor of extra blocks when evicting. For example free the number of blocks requested * (1 + extraFreeFactor) */<a name="line.239"></a> -<span class="sourceLineNo">240</span> private float extraFreeFactor;<a name="line.240"></a> -<span class="sourceLineNo">241</span><a name="line.241"></a> -<span class="sourceLineNo">242</span> /** Single access bucket size */<a name="line.242"></a> -<span class="sourceLineNo">243</span> private float singleFactor;<a name="line.243"></a> -<span class="sourceLineNo">244</span><a name="line.244"></a> -<span class="sourceLineNo">245</span> /** Multiple access bucket size */<a name="line.245"></a> -<span class="sourceLineNo">246</span> private float multiFactor;<a name="line.246"></a> -<span class="sourceLineNo">247</span><a name="line.247"></a> -<span class="sourceLineNo">248</span> /** In-memory bucket size */<a name="line.248"></a> -<span class="sourceLineNo">249</span> private float memoryFactor;<a name="line.249"></a> -<span class="sourceLineNo">250</span><a name="line.250"></a> -<span class="sourceLineNo">251</span> public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.251"></a> -<span class="sourceLineNo">252</span> int writerThreadNum, int writerQLen, String persistencePath) throws FileNotFoundException,<a name="line.252"></a> -<span class="sourceLineNo">253</span> IOException {<a name="line.253"></a> -<span class="sourceLineNo">254</span> this(ioEngineName, capacity, blockSize, bucketSizes, writerThreadNum, writerQLen,<a name="line.254"></a> -<span class="sourceLineNo">255</span> persistencePath, DEFAULT_ERROR_TOLERATION_DURATION, HBaseConfiguration.create());<a name="line.255"></a> -<span class="sourceLineNo">256</span> }<a name="line.256"></a> -<span class="sourceLineNo">257</span><a name="line.257"></a> -<span class="sourceLineNo">258</span> public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.258"></a> -<span class="sourceLineNo">259</span> int writerThreadNum, int writerQLen, String persistencePath, int ioErrorsTolerationDuration,<a name="line.259"></a> -<span class="sourceLineNo">260</span> Configuration conf)<a name="line.260"></a> -<span class="sourceLineNo">261</span> throws FileNotFoundException, IOException {<a name="line.261"></a> -<span class="sourceLineNo">262</span> this.ioEngine = getIOEngineFromName(ioEngineName, capacity, persistencePath);<a name="line.262"></a> -<span class="sourceLineNo">263</span> this.writerThreads = new WriterThread[writerThreadNum];<a name="line.263"></a> -<span class="sourceLineNo">264</span> long blockNumCapacity = capacity / blockSize;<a name="line.264"></a> -<span class="sourceLineNo">265</span> if (blockNumCapacity >= Integer.MAX_VALUE) {<a name="line.265"></a> -<span class="sourceLineNo">266</span> // Enough for about 32TB of cache!<a name="line.266"></a> -<span class="sourceLineNo">267</span> throw new IllegalArgumentException("Cache capacity is too large, only support 32TB now");<a name="line.267"></a> -<span class="sourceLineNo">268</span> }<a name="line.268"></a> -<span class="sourceLineNo">269</span><a name="line.269"></a> -<span class="sourceLineNo">270</span> this.acceptableFactor = conf.getFloat(ACCEPT_FACTOR_CONFIG_NAME, DEFAULT_ACCEPT_FACTOR);<a name="line.270"></a> -<span class="sourceLineNo">271</span> this.minFactor = conf.getFloat(MIN_FACTOR_CONFIG_NAME, DEFAULT_MIN_FACTOR);<a name="line.271"></a> -<span class="sourceLineNo">272</span> this.extraFreeFactor = conf.getFloat(EXTRA_FREE_FACTOR_CONFIG_NAME, DEFAULT_EXTRA_FREE_FACTOR);<a name="line.272"></a> -<span class="sourceLineNo">273</span> this.singleFactor = conf.getFloat(SINGLE_FACTOR_CONFIG_NAME, DEFAULT_SINGLE_FACTOR);<a name="line.273"></a> -<span class="sourceLineNo">274</span> this.multiFactor = conf.getFloat(MULTI_FACTOR_CONFIG_NAME, DEFAULT_MULTI_FACTOR);<a name="line.274"></a> -<span class="sourceLineNo">275</span> this.memoryFactor = conf.getFloat(MEMORY_FACTOR_CONFIG_NAME, DEFAULT_MEMORY_FACTOR);<a name="line.275"></a> -<span class="sourceLineNo">276</span><a name="line.276"></a> -<span class="sourceLineNo">277</span> sanityCheckConfigs();<a name="line.277"></a> -<span class="sourceLineNo">278</span><a name="line.278"></a> -<span class="sourceLineNo">279</span> LOG.info("Instantiating BucketCache with acceptableFactor: " + acceptableFactor + ", minFactor: " + minFactor +<a name="line.279"></a> -<span class="sourceLineNo">280</span> ", extraFreeFactor: " + extraFreeFactor + ", singleFactor: " + singleFactor + ", multiFactor: " + multiFactor +<a name="line.280"></a> -<span class="sourceLineNo">281</span> ", memoryFactor: " + memoryFactor);<a name="line.281"></a> -<span class="sourceLineNo">282</span><a name="line.282"></a> -<span class="sourceLineNo">283</span> this.cacheCapacity = capacity;<a name="line.283"></a> -<span class="sourceLineNo">284</span> this.persistencePath = persistencePath;<a name="line.284"></a> -<span class="sourceLineNo">285</span> this.blockSize = blockSize;<a name="line.285"></a> -<span class="sourceLineNo">286</span> this.ioErrorsTolerationDuration = ioErrorsTolerationDuration;<a name="line.286"></a> -<span class="sourceLineNo">287</span><a name="line.287"></a> -<span class="sourceLineNo">288</span> bucketAllocator = new BucketAllocator(capacity, bucketSizes);<a name="line.288"></a> -<span class="sourceLineNo">289</span> for (int i = 0; i < writerThreads.length; ++i) {<a name="line.289"></a> -<span class="sourceLineNo">290</span> writerQueues.add(new ArrayBlockingQueue<>(writerQLen));<a name="line.290"></a> -<span class="sourceLineNo">291</span> }<a name="line.291"></a> -<span class="sourceLineNo">292</span><a name="line.292"></a> -<span class="sourceLineNo">293</span> assert writerQueues.size() == writerThreads.length;<a name="line.293"></a> -<span class="sourceLineNo">294</span> this.ramCache = new ConcurrentHashMap<>();<a name="line.294"></a> -<span class="sourceLineNo">295</span><a name="line.295"></a> -<span class="sourceLineNo">296</span> this.backingMap = new ConcurrentHashMap<>((int) blockNumCapacity);<a name="line.296"></a> -<span class="sourceLineNo">297</span><a name="line.297"></a> -<span class="sourceLineNo">298</span> if (ioEngine.isPersistent() && persistencePath != null) {<a name="line.298"></a> -<span class="sourceLineNo">299</span> try {<a name="line.299"></a> -<span class="sourceLineNo">300</span> retrieveFromFile(bucketSizes);<a name="line.300"></a> -<span class="sourceLineNo">301</span> } catch (IOException ioex) {<a name="line.301"></a> -<span class="sourceLineNo">302</span> LOG.error("Can't restore from file because of", ioex);<a name="line.302"></a> -<span class="sourceLineNo">303</span> } catch (ClassNotFoundException cnfe) {<a name="line.303"></a> -<span class="sourceLineNo">304</span> LOG.error("Can't restore from file in rebuild because can't deserialise",cnfe);<a name="line.304"></a> -<span class="sourceLineNo">305</span> throw new RuntimeException(cnfe);<a name="line.305"></a> -<span class="sourceLineNo">306</span> }<a name="line.306"></a> -<span class="sourceLineNo">307</span> }<a name="line.307"></a> -<span class="sourceLineNo">308</span> final String threadName = Thread.currentThread().getName();<a name="line.308"></a> -<span class="sourceLineNo">309</span> this.cacheEnabled = true;<a name="line.309"></a> -<span class="sourceLineNo">310</span> for (int i = 0; i < writerThreads.length; ++i) {<a name="line.310"></a> -<span class="sourceLineNo">311</span> writerThreads[i] = new WriterThread(writerQueues.get(i));<a name="line.311"></a> -<span class="sourceLineNo">312</span> writerThreads[i].setName(threadName + "-BucketCacheWriter-" + i);<a name="line.312"></a> -<span class="sourceLineNo">313</span> writerThreads[i].setDaemon(true);<a name="line.313"></a> -<span class="sourceLineNo">314</span> }<a name="line.314"></a> -<span class="sourceLineNo">315</span> startWriterThreads();<a name="line.315"></a> -<span class="sourceLineNo">316</span><a name="line.316"></a> -<span class="sourceLineNo">317</span> // Run the statistics thread periodically to print the cache statistics log<a name="line.317"></a> -<span class="sourceLineNo">318</span> // TODO: Add means of turning this off. Bit obnoxious running thread just to make a log<a name="line.318"></a> -<span class="sourceLineNo">319</span> // every five minutes.<a name="line.319"></a> -<span class="sourceLineNo">320</span> this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(this),<a name="line.320"></a> -<span class="sourceLineNo">321</span> statThreadPeriod, statThreadPeriod, TimeUnit.SECONDS);<a name="line.321"></a> -<span class="sourceLineNo">322</span> LOG.info("Started bucket cache; ioengine=" + ioEngineName +<a name="line.322"></a> -<span class="sourceLineNo">323</span> ", capacity=" + StringUtils.byteDesc(capacity) +<a name="line.323"></a> -<span class="sourceLineNo">324</span> ", blockSize=" + StringUtils.byteDesc(blockSize) + ", writerThreadNum=" +<a name="line.324"></a> -<span class="sourceLineNo">325</span> writerThreadNum + ", writerQLen=" + writerQLen + ", persistencePath=" +<a name="line.325"></a> -<span class="sourceLineNo">326</span> persistencePath + ", bucketAllocator=" + this.bucketAllocator.getClass().getName());<a name="line.326"></a> -<span class="sourceLineNo">327</span> }<a name="line.327"></a> -<span class="sourceLineNo">328</span><a name="line.328"></a> -<span class="sourceLineNo">329</span> private void sanityCheckConfigs() {<a name="line.329"></a> -<span class="sourceLineNo">330</span> Preconditions.checkArgument(acceptableFactor <= 1 && acceptableFactor >= 0, ACCEPT_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.330"></a> -<span class="sourceLineNo">331</span> Preconditions.checkArgument(minFactor <= 1 && minFactor >= 0, MIN_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.331"></a> -<span class="sourceLineNo">332</span> Preconditions.checkArgument(minFactor <= acceptableFactor, MIN_FACTOR_CONFIG_NAME + " must be <= " + ACCEPT_FACTOR_CONFIG_NAME);<a name="line.332"></a> -<span class="sourceLineNo">333</span> Preconditions.checkArgument(extraFreeFactor >= 0, EXTRA_FREE_FACTOR_CONFIG_NAME + " must be greater than 0.0");<a name="line.333"></a> -<span class="sourceLineNo">334</span> Preconditions.checkArgument(singleFactor <= 1 && singleFactor >= 0, SINGLE_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.334"></a> -<span class="sourceLineNo">335</span> Preconditions.checkArgument(multiFactor <= 1 && multiFactor >= 0, MULTI_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.335"></a> -<span class="sourceLineNo">336</span> Preconditions.checkArgument(memoryFactor <= 1 && memoryFactor >= 0, MEMORY_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.336"></a> -<span class="sourceLineNo">337</span> Preconditions.checkArgument((singleFactor + multiFactor + memoryFactor) == 1, SINGLE_FACTOR_CONFIG_NAME + ", " +<a name="line.337"></a> -<span class="sourceLineNo">338</span> MULTI_FACTOR_CONFIG_NAME + ", and " + MEMORY_FACTOR_CONFIG_NAME + " segments must add up to 1.0");<a name="line.338"></a> -<span class="sourceLineNo">339</span> }<a name="line.339"></a> -<span class="sourceLineNo">340</span><a name="line.340"></a> -<span class="sourceLineNo">341</span> /**<a name="line.341"></a> -<span class="sourceLineNo">342</span> * Called by the constructor to start the writer threads. 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class="sourceLineNo">490</span> if (re != null) {<a name="line.490"></a> -<span class="sourceLineNo">491</span> if (updateCacheMetrics) {<a name="line.491"></a> -<span class="sourceLineNo">492</span> cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.492"></a> -<span class="sourceLineNo">493</span> }<a name="line.493"></a> -<span class="sourceLineNo">494</span> re.access(accessCount.incrementAndGet());<a name="line.494"></a> -<span class="sourceLineNo">495</span> return re.getData();<a name="line.495"></a> -<span class="sourceLineNo">496</span> }<a name="line.496"></a> -<span class="sourceLineNo">497</span> BucketEntry bucketEntry = backingMap.get(key);<a name="line.497"></a> -<span class="sourceLineNo">498</span> if (bucketEntry != null) {<a name="line.498"></a> -<span class="sourceLineNo">499</span> long start = System.nanoTime();<a name="line.499"></a> -<span class="sourceLineNo">500</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.500"></a> -<span class="sourceLineNo">501</span> try {<a name="line.501"></a> -<span class="sourceLineNo">502</span> lock.readLock().lock();<a name="line.502"></a> -<span class="sourceLineNo">503</span> // We can not read here even if backingMap does contain the given key because its offset<a name="line.503"></a> -<span class="sourceLineNo">504</span> // maybe changed. 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BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.602"></a> -<span class="sourceLineNo">603</span> if (bucketEntry == null) {<a name="line.603"></a> -<span class="sourceLineNo">604</span> if (removedBlock != null) {<a name="line.604"></a> -<span class="sourceLineNo">605</span> cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.605"></a> -<span class="sourceLineNo">606</span> return true;<a name="line.606"></a> -<span class="sourceLineNo">607</span> } else {<a name="line.607"></a> -<span class="sourceLineNo">608</span> return false;<a name="line.608"></a> -<span class="sourceLineNo">609</span> }<a name="line.609"></a> -<span class="sourceLineNo">610</span> }<a name="line.610"></a> -<span class="sourceLineNo">611</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.611"></a> -<span class="sourceLineNo">612</span> try {<a name="line.612"></a> -<span class="sourceLineNo">613</span> lock.writeLock().lock();<a name="line.613"></a> 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Can not be freed now");<a name="line.625"></a> -<span class="sourceLineNo">626</span> }<a name="line.626"></a> -<span class="sourceLineNo">627</span> return false;<a name="line.627"></a> -<span class="sourceLineNo">628</span> } else {<a name="line.628"></a> -<span class="sourceLineNo">629</span> if (LOG.isDebugEnabled()) {<a name="line.629"></a> -<span class="sourceLineNo">630</span> LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.630"></a> -<span class="sourceLineNo">631</span> + " readers. Can not be freed now. Hence will mark this"<a name="line.631"></a> -<span class="sourceLineNo">632</span> + " for evicting at a later point");<a name="line.632"></a> -<span class="sourceLineNo">633</span> }<a name="line.633"></a> -<span class="sourceLineNo">634</span> bucketEntry.markedForEvict = true;<a name="line.634"></a> -<span class="sourceLineNo">635</span> }<a name="line.635"></a> -<span class="sourceLineNo">636</span> }<a name="line.636"></a> -<span class="sourceLineNo">637</span> } finally {<a name="line.637"></a> -<span class="sourceLineNo">638</span> lock.writeLock().unlock();<a name="line.638"></a> -<span class="sourceLineNo">639</span> }<a name="line.639"></a> -<span class="sourceLineNo">640</span> cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.640"></a> -<span class="sourceLineNo">641</span> return true;<a name="line.641"></a> -<span class="sourceLineNo">642</span> }<a name="line.642"></a> -<span class="sourceLineNo">643</span><a name="line.643"></a> -<span class="sourceLineNo">644</span> /*<a name="line.644"></a> -<span class="sourceLineNo">645</span> * Statistics thread. Periodically output cache statistics to the log.<a name="line.645"></a> -<span class="sourceLineNo">646</span> */<a name="line.646"></a> -<span class="sourceLineNo">647</span> private static class StatisticsThread extends Thread {<a name="line.647"></a> -<span class="sourceLineNo">648</span> private final BucketCache bucketCache;<a name="line.648"></a> -<span class="sourceLineNo">649</span><a name="line.649"></a> -<span class="sourceLineNo">650</span> public StatisticsThread(BucketCache bucketCache) {<a name="line.650"></a> -<span class="sourceLineNo">651</span> super("BucketCacheStatsThread");<a name="line.651"></a> -<span class="sourceLineNo">652</span> setDaemon(true);<a name="line.652"></a> -<span class="sourceLineNo">653</span> this.bucketCache = bucketCache;<a name="line.653"></a> -<span class="sourceLineNo">654</span> }<a name="line.654"></a> -<span class="sourceLineNo">655</span><a name="line.655"></a> -<span class="sourceLineNo">656</span> @Override<a name="line.656"></a> -<span class="sourceLineNo">657</span> public void run() {<a name="line.657"></a> -<span class="sourceLineNo">658</span> bucketCache.logStats();<a name="line.658"></a> -<span class="sourceLineNo">659</span> }<a name="line.659"></a> -<span class="sourceLineNo">660</span> }<a name="line.660"></a> -<span class="sourceLineNo">661</span><a name="line.661"></a> -<span class="sourceLineNo">662</span> public void logStats() {<a name="line.662"></a> -<span class="sourceLineNo">663</span> long totalSize = bucketAllocator.getTotalSize();<a name="line.663"></a> -<span class="sourceLineNo">664</span> long usedSize = bucketAllocator.getUsedSize();<a name="line.664"></a> -<span class="sourceLineNo">665</span> long freeSize = totalSize - usedSize;<a name="line.665"></a> -<span class="sourceLineNo">666</span> long cacheSize = getRealCacheSize();<a name="line.666"></a> -<span class="sourceLineNo">667</span> LOG.info("failedBlockAdditions=" + cacheStats.getFailedInserts() + ", " +<a name="line.667"></a> -<span class="sourceLineNo">668</span> "totalSize=" + StringUtils.byteDesc(totalSize) + ", " +<a name="line.668"></a> -<span class="sourceLineNo">669</span> "freeSize=" + StringUtils.byteDesc(freeSize) + ", " +<a name="line.669"></a> -<span class="sourceLineNo">670</span> "usedSize=" + StringUtils.byteDesc(usedSize) +", " +<a name="line.670"></a> -<span class="sourceLineNo">671</span> "cacheSize=" + StringUtils.byteDesc(cacheSize) +", " +<a name="line.671"></a> -<span class="sourceLineNo">672</span> "accesses=" + cacheStats.getRequestCount() + ", " +<a name="line.672"></a> -<span class="sourceLineNo">673</span> "hits=" + cacheStats.getHitCount() + ", " +<a name="line.673"></a> -<span class="sourceLineNo">674</span> "IOhitsPerSecond=" + cacheStats.getIOHitsPerSecond() + ", " +<a name="line.674"></a> -<span class="sourceLineNo">675</span> "IOTimePerHit=" + String.format("%.2f", cacheStats.getIOTimePerHit())+ ", " +<a name="line.675"></a> -<span class="sourceLineNo">676</span> "hitRatio=" + (cacheStats.getHitCount() == 0 ? "0," :<a name="line.676"></a> -<span class="sourceLineNo">677</span> (StringUtils.formatPercent(cacheStats.getHitRatio(), 2)+ ", ")) +<a name="line.677"></a> -<span class="sourceLineNo">678</span> "cachingAccesses=" + cacheStats.getRequestCachingCount() + ", " +<a name="line.678"></a> -<span class="sourceLineNo">679</span> "cachingHits=" + cacheStats.getHitCachingCount() + ", " +<a name="line.679"></a> -<span class="sourceLineNo">680</span> "cachingHitsRatio=" +(cacheStats.getHitCachingCount() == 0 ? "0," :<a name="line.680"></a> -<span class="sourceLineNo">681</span> (StringUtils.formatPercent(cacheStats.getHitCachingRatio(), 2)+ ", ")) +<a name="line.681"></a> -<span class="sourceLineNo">682</span> "evictions=" + cacheStats.getEvictionCount() + ", " +<a name="line.682"></a> -<span class="sourceLineNo">683</span> "evicted=" + cacheStats.getEvictedCount() + ", " +<a name="line.683"></a> -<span class="sourceLineNo">684</span> "evictedPerRun=" + cacheStats.evictedPerEviction());<a name="line.684"></a> -<span class="sourceLineNo">685</span> cacheStats.reset();<a name="line.685"></a> -<span class="sourceLineNo">686</span> }<a name="line.686"></a> -<span class="sourceLineNo">687</span><a name="line.687"></a> -<span class="sourceLineNo">688</span> public long getRealCacheSize() {<a name="line.688"></a> -<span class="sourceLineNo">689</span> return this.realCacheSize.sum();<a name="line.689"></a> -<span class="sourceLineNo">690</span> }<a name="line.690"></a> -<span class="sourceLineNo">691</span><a name="line.691"></a> -<span class="sourceLineNo">692</span> private long acceptableSize() {<a name="line.692"></a> -<span class="sourceLineNo">693</span> return (long) Math.floor(bucketAllocator.getTotalSize() * acceptableFactor);<a name="line.693"></a> -<span class="sourceLineNo">694</span> }<a name="line.694"></a> -<span class="sourceLineNo">695</span><a name="line.695"></a> -<span class="sourceLineNo">696</span> @VisibleForTesting<a name="line.696"></a> -<span class="sourceLineNo">697</span> long getPartitionSize(float partitionFactor) {<a name="line.697"></a> -<span class="sourceLineNo">698</span> return (long) Math.floor(bucketAllocator.getTotalSize() * partitionFactor * minFactor);<a name="line.698"></a> -<span class="sourceLineNo">699</span> }<a name="line.699"></a> -<span class="sourceLineNo">700</span><a name="line.700"></a> -<span class="sourceLineNo">701</span> /**<a name="line.701"></a> -<span class="sourceLineNo">702</span> * Return the count of bucketSizeinfos still need free space<a name="line.702"></a> -<span class="sourceLineNo">703</span> */<a name="line.703"></a> -<span class="sourceLineNo">704</span> private int bucketSizesAboveThresholdCount(float minFactor) {<a name="line.704"></a> -<span class="sourceLineNo">705</span> BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.705"></a> -<span class="sourceLineNo">706</span> int fullCount = 0;<a name="line.706"></a> -<span class="sourceLineNo">707</span> for (int i = 0; i < stats.length; i++) {<a name="line.707"></a> -<span class="sourceLineNo">708</span> long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - minFactor));<a name="line.708"></a> -<span class="sourceLineNo">709</span> freeGoal = Math.max(freeGoal, 1);<a name="line.709"></a> -<span class="sourceLineNo">710</span> if (stats[i].freeCount() < freeGoal) {<a name="line.710"></a> -<span class="sourceLineNo">711</span> fullCount++;<a name="line.711"></a> -<span class="sourceLineNo">712</span> }<a name="line.712"></a> -<span class="sourceLineNo">713</span> }<a name="line.713"></a> -<span class="sourceLineNo">714</span> return fullCount;<a name="line.714"></a> -<span class="sourceLineNo">715</span> }<a name="line.715"></a> -<span class="sourceLineNo">716</span><a name="line.716"></a> -<span class="sourceLineNo">717</span> /**<a name="line.717"></a> -<span class="sourceLineNo">718</span> * This method will find the buckets that are minimally occupied<a name="line.718"></a> -<span class="sourceLineNo">719</span> * and are not reference counted and will free them completely<a name="line.719"></a> -<span class="sourceLineNo">720</span> * without any constraint on the access times of the elements,<a name="line.720"></a> -<span class="sourceLineNo">721</span> * and as a process will completely free at most the number of buckets<a name="line.721"></a> -<span class="sourceLineNo">722</span> * passed, sometimes it might not due to changing refCounts<a name="line.722"></a> -<span class="sourceLineNo">723</span> *<a name="line.723"></a> -<span class="sourceLineNo">724</span> * @param completelyFreeBucketsNeeded number of buckets to free<a name="line.724"></a> -<span class="sourceLineNo">725</span> **/<a name="line.725"></a> -<span class="sourceLineNo">726</span> private void freeEntireBuckets(int completelyFreeBucketsNeeded) {<a name="line.726"></a> -<span class="sourceLineNo">727</span> if (completelyFreeBucketsNeeded != 0) {<a name="line.727"></a> -<span class="sourceLineNo">728</span> // First we will build a set where the offsets are reference counted, usually<a name="line.728"></a> -<span class="sourceLineNo">729</span> // this set is small around O(Handler Count) unless something else is wrong<a name="line.729"></a> -<span class="sourceLineNo">730</span> Set<Integer> inUseBuckets = new HashSet<Integer>();<a name="line.730"></a> -<span class="sourceLineNo">731</span> for (BucketEntry entry : backingMap.values()) {<a name="line.731"></a> -<span class="sourceLineNo">732</span> if (entry.refCount.get() != 0) {<a name="line.732"></a> -<span class="sourceLineNo">733</span> inUseBuckets.add(bucketAllocator.getBucketIndex(entry.offset()));<a name="line.733"></a> -<span class="sourceLineNo">734</span> }<a name="line.734"></a> -<span class="sourceLineNo">735</span> }<a name="line.735"></a> -<span class="sourceLineNo">736</span><a name="line.736"></a> -<span class="sourceLineNo">737</span> Set<Integer> candidateBuckets = bucketAllocator.getLeastFilledBuckets(<a name="line.737"></a> -<span class="sourceLineNo">738</span> inUseBuckets, completelyFreeBucketsNeeded);<a name="line.738"></a> -<span class="sourceLineNo">739</span> for (Map.Entry<BlockCacheKey, BucketEntry> entry : backingMap.entrySet()) {<a name="line.739"></a> -<span class="sourceLineNo">740</span> if (candidateBuckets.contains(bucketAllocator<a name="line.740"></a> -<span class="sourceLineNo">741</span> .getBucketIndex(entry.getValue().offset()))) {<a name="line.741"></a> -<span class="sourceLineNo">742</span> evictBlock(entry.getKey(), false);<a name="line.742"></a> -<span class="sourceLineNo">743</span> }<a name="line.743"></a> -<span class="sourceLineNo">744</span> }<a name="line.744"></a> -<span class="sourceLineNo">745</span> }<a name="line.745"></a> -<span class="sourceLineNo">746</span> }<a name="line.746"></a> -<span class="sourceLineNo">747</span><a name="line.747"></a> -<span class="sourceLineNo">748</span> /**<a name="line.748"></a> -<span class="sourceLineNo">749</span> * Free the space if the used size reaches acceptableSize() or one size block<a name="line.749"></a> -<span class="sourceLineNo">750</span> * couldn't be allocated. When freeing the space, we use the LRU algorithm and<a name="line.750"></a> -<span class="sourceLineNo">751</span> * ensure there must be some blocks evicted<a name="line.751"></a> -<span class="sourceLineNo">752</span> * @param why Why we are being called<a name="line.752"></a> -<span class="sourceLineNo">753</span> */<a name="line.753"></a> -<span class="sourceLineNo">754</span> private void freeSpace(final String why) {<a name="line.754"></a> -<span class="sourceLineNo">755</span> // Ensure only one freeSpace progress at a time<a name="line.755"></a> -<span class="sourceLineNo">756</span> if (!freeSpaceLock.tryLock()) {<a name="line.756"></a> -<span class="sourceLineNo">757</span> return;<a name="line.757"></a> -<span class="sourceLineNo">758</span> }<a name="line.758"></a> -<span class="sourceLineNo">759</span> try {<a name="line.759"></a> -<span class="sourceLineNo">760</span> freeInProgress = true;<a name="line.760"></a> -<span class="sourceLineNo">761</span> long bytesToFreeWithoutExtra = 0;<a name="line.761"></a> -<span class="sourceLineNo">762</span> // Calculate free byte for each bucketSizeinfo<a name="line.762"></a> -<span class="sourceLineNo">763</span> StringBuilder msgBuffer = LOG.isDebugEnabled()? new StringBuilder(): null;<a name="line.763"></a> -<span class="sourceLineNo">764</span> BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.764"></a> -<span class="sourceLineNo">765</span> long[] bytesToFreeForBucket = new long[stats.length];<a name="line.765"></a> -<span class="sourceLineNo">766</span> for (int i = 0; i < stats.length; i++) {<a name="line.766"></a> -<span class="sourceLineNo">767</span> bytesToFreeForBucket[i] = 0;<a name="line.767"></a> -<span class="sourceLineNo">768</span> long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - minFactor));<a name="line.768"></a> -<span class="sourceLineNo">769</span> freeGoal = Math.max(freeGoal, 1);<a name="line.769"></a> -<span class="sourceLineNo">770</span> if (stats[i].freeCount() < freeGoal) {<a name="line.770"></a> -<span class="sourceLineNo">771</span> bytesToFreeForBucket[i] = stats[i].itemSize() * (freeGoal - stats[i].freeCount());<a name="line.771"></a> -<span class="sourceLineNo">772</span> bytesToFreeWithoutExtra += bytesToFreeForBucket[i];<a name="line.772"></a> -<span class="sourceLineNo">773</span> if (msgBuffer != null) {<a name="line.773"></a> -<span class="sourceLineNo">774</span> msgBuffer.append("Free for bucketSize(" + stats[i].itemSize() + ")="<a name="line.774"></a> -<span class="sourceLineNo">775</span> + StringUtils.byteDesc(bytesToFreeForBucket[i]) + ", ");<a name="line.775"></a> -<span class="sourceLineNo">776</span> }<a name="line.776"></a> -<span class="sourceLineNo">777</span> }<a name="line.777"></a> -<span class="sourceLineNo">778</span> }<a name="line.778"></a> -<span class="sourceLineNo">779</span> if (msgBuffer != null) {<a name="line.779"></a> -<span class="sourceLineNo">780</span> msgBuffer.append("Free for total=" + StringUtils.byteDesc(bytesToFreeWithoutExtra) + ", ");<a name="line.780"></a> -<span class="sourceLineNo">781</span> }<a name="line.781"></a> -<span class="sourceLineNo">782</span><a name="line.782"></a> -<span class="sourceLineNo">783</span> if (bytesToFreeWithoutExtra <= 0) {<a name="line.783"></a> -<span class="sourceLineNo">784</span> return;<a name="line.784"></a> -<span class="sourceLineNo">785</span> }<a name="line.785"></a> -<span class="sourceLineNo">786</span> long currentSize = bucketAllocator.getUsedSize();<a name="line.786"></a> -<span class="sourceLineNo">787</span> long totalSize = bucketAllocator.getTotalSize();<a name="line.787"></a> -<span class="sourceLineNo">788</span> if (LOG.isDebugEnabled() && msgBuffer != null) {<a name="line.788"></a> -<span class="sourceLineNo">789</span> LOG.debug("Free started because \"" + why + "\"; " + msgBuffer.toString() +<a name="line.789"></a> -<span class="sourceLineNo">790</span> " of current used=" + StringUtils.byteDesc(currentSize) + ", actual cacheSize=" +<a name="line.790"></a> -<span class="sourceLineNo">791</span> StringUtils.byteDesc(realCacheSize.sum()) + ", total=" + StringUtils.byteDesc(totalSize));<a name="line.791"></a> -<span class="sourceLineNo">792</span> }<a name="line.792"></a> -<span class="sourceLineNo">793</span><a name="line.793"></a> -<span class="sourceLineNo">794</span> long bytesToFreeWithExtra = (long) Math.floor(bytesToFreeWithoutExtra<a name="line.794"></a> -<span class="sourceLineNo">795</span> * (1 + extraFreeFactor));<a name="line.795"></a> -<span class="sourceLineNo">796</span><a name="line.796"></a> -<span class="sourceLineNo">797</span> // Instantiate priority buckets<a name="line.797"></a> -<span class="sourceLineNo">798</span> BucketEntryGroup bucketSingle = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.798"></a> -<span class="sourceLineNo">799</span> blockSize, getPartitionSize(singleFactor));<a name="line.799"></a> -<span class="sourceLineNo">800</span> BucketEntryGroup bucketMulti = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.800"></a> -<span class="sourceLineNo">801</span> blockSize, getPartitionSize(multiFactor));<a name="line.801"></a> -<span class="sourceLineNo">802</span> BucketEntryGroup bucketMemory = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.802"></a> -<span class="sourceLineNo">803</span> blockSize, getPartitionSize(memoryFactor));<a name="line.803"></a> -<span class="sourceLineNo">804</span><a name="line.804"></a> -<span class="sourceLineNo">805</span> // Scan entire map putting bucket entry into appropriate bucket entry<a name="line.805"></a> -<span class="sourceLineNo">806</span> // group<a name="line.806"></a> -<span class="sourceLineNo">807</span> for (Map.Entry<BlockCacheKey, BucketEntry> bucketEntryWithKey : backingMap.entrySet()) {<a name="line.807"></a> -<span class="sourceLineNo">808</span> switch (bucketEntryWithKey.getValue().getPriority()) {<a name="line.808"></a> -<span class="sourceLineNo">809</span> case SINGLE: {<a name="line.809"></a> -<span class="sourceLineNo">810</span> bucketSingle.add(bucketEntryWithKey);<a name="line.810"></a> -<span class="sourceLineNo">811</span> break;<a name="line.811"></a> -<span class="sourceLineNo">812</span> }<a name="line.812"></a> -<span class="sourceLineNo">813</span> case MULTI: {<a name="line.813"></a> -<span class="sourceLineNo">814</span> bucketMulti.add(bucketEntryWithKey);<a name="line.814"></a> -<span class="sourceLineNo">815</span> break;<a name="line.815"></a> -<span class="sourceLineNo">816</span> }<a name="line.816"></a> -<span class="sourceLineNo">817</span> case MEMORY: {<a name="line.817"></a> -<span class="sourceLineNo">818</span> bucketMemory.add(bucketEntryWithKey);<a name="line.818"></a> -<span class="sourceLineNo">819</span> break;<a name="line.819"></a> -<span class="sourceLineNo">820</span> }<a name="line.820"></a> -<span class="sourceLineNo">821</span> }<a name="line.821"></a> -<span class="sourceLineNo">822</span> }<a name="line.822"></a> -<span class="sourceLineNo">823</span><a name="line.823"></a> -<span class="sourceLineNo">824</span> PriorityQueue<BucketEntryGroup> bucketQueue = new PriorityQueue<>(3);<a name="line.824"></a> +<span class="sourceLineNo">039</span>import java.util.PriorityQueue;<a name="line.39"></a> +<span class="sourceLineNo">040</span>import java.util.Set;<a name="line.40"></a> +<span class="sourceLineNo">041</span>import java.util.concurrent.ArrayBlockingQueue;<a name="line.41"></a> +<span class="sourceLineNo">042</span>import java.util.concurrent.BlockingQueue;<a name="line.42"></a> +<span class="sourceLineNo">043</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.43"></a> +<span class="sourceLineNo">044</span>import java.util.concurrent.ConcurrentMap;<a name="line.44"></a> +<span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentSkipListSet;<a name="line.45"></a> +<span class="sourceLineNo">046</span>import java.util.concurrent.Executors;<a name="line.46"></a> +<span class="sourceLineNo">047</span>import java.util.concurrent.ScheduledExecutorService;<a name="line.47"></a> +<span class="sourceLineNo">048</span>import java.util.concurrent.TimeUnit;<a name="line.48"></a> +<span class="sourceLineNo">049</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.49"></a> +<span class="sourceLineNo">050</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.50"></a> +<span class="sourceLineNo">051</span>import java.util.concurrent.atomic.LongAdder;<a name="line.51"></a> +<span class="sourceLineNo">052</span>import java.util.concurrent.locks.Lock;<a name="line.52"></a> +<span class="sourceLineNo">053</span>import java.util.concurrent.locks.ReentrantLock;<a name="line.53"></a> +<span class="sourceLineNo">054</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.54"></a> +<span class="sourceLineNo">055</span>import org.apache.hadoop.conf.Configuration;<a name="line.55"></a> +<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.56"></a> +<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.io.HeapSize;<a name="line.57"></a> +<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.io.hfile.BlockCache;<a name="line.58"></a> +<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.59"></a> +<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheUtil;<a name="line.60"></a> +<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.io.hfile.BlockPriority;<a name="line.61"></a> +<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.io.hfile.BlockType;<a name="line.62"></a> +<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.io.hfile.CacheStats;<a name="line.63"></a> +<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.io.hfile.Cacheable;<a name="line.64"></a> +<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.io.hfile.Cacheable.MemoryType;<a name="line.65"></a> +<span class="sourceLineNo">066</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializer;<a name="line.66"></a> +<span class="sourceLineNo">067</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializerIdManager;<a name="line.67"></a> +<span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.io.hfile.CachedBlock;<a name="line.68"></a> +<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.io.hfile.HFileBlock;<a name="line.69"></a> +<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.70"></a> +<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.71"></a> +<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.util.HasThread;<a name="line.72"></a> +<span class="sourceLineNo">073</span>import org.apache.hadoop.hbase.util.IdReadWriteLock;<a name="line.73"></a> +<span class="sourceLineNo">074</span>import org.apache.hadoop.hbase.util.IdReadWriteLock.ReferenceType;<a name="line.74"></a> +<span class="sourceLineNo">075</span>import org.apache.hadoop.util.StringUtils;<a name="line.75"></a> +<span class="sourceLineNo">076</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.76"></a> +<span class="sourceLineNo">077</span>import org.slf4j.Logger;<a name="line.77"></a> +<span class="sourceLineNo">078</span>import org.slf4j.LoggerFactory;<a name="line.78"></a> +<span class="sourceLineNo">079</span><a name="line.79"></a> +<span class="sourceLineNo">080</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.80"></a> +<span class="sourceLineNo">081</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.81"></a> +<span class="sourceLineNo">082</span>import org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;<a name="line.82"></a> +<span class="sourceLineNo">083</span><a name="line.83"></a> +<span class="sourceLineNo">084</span>/**<a name="line.84"></a> +<span class="sourceLineNo">085</span> * BucketCache uses {@link BucketAllocator} to allocate/free blocks, and uses<a name="line.85"></a> +<span class="sourceLineNo">086</span> * BucketCache#ramCache and BucketCache#backingMap in order to<a name="line.86"></a> +<span class="sourceLineNo">087</span> * determine if a given element is in the cache. The bucket cache can use on-heap or<a name="line.87"></a> +<span class="sourceLineNo">088</span> * off-heap memory {@link ByteBufferIOEngine} or in a file {@link FileIOEngine} to<a name="line.88"></a> +<span class="sourceLineNo">089</span> * store/read the block data.<a name="line.89"></a> +<span class="sourceLineNo">090</span> *<a name="line.90"></a> +<span class="sourceLineNo">091</span> * <p>Eviction is via a similar algorithm as used in<a name="line.91"></a> +<span class="sourceLineNo">092</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache}<a name="line.92"></a> +<span class="sourceLineNo">093</span> *<a name="line.93"></a> +<span class="sourceLineNo">094</span> * <p>BucketCache can be used as mainly a block cache (see<a name="line.94"></a> +<span class="sourceLineNo">095</span> * {@link org.apache.hadoop.hbase.io.hfile.CombinedBlockCache}), combined with<a name="line.95"></a> +<span class="sourceLineNo">096</span> * LruBlockCache to decrease CMS GC and heap fragmentation.<a name="line.96"></a> +<span class="sourceLineNo">097</span> *<a name="line.97"></a> +<span class="sourceLineNo">098</span> * <p>It also can be used as a secondary cache (e.g. using a file on ssd/fusionio to store<a name="line.98"></a> +<span class="sourceLineNo">099</span> * blocks) to enlarge cache space via<a name="line.99"></a> +<span class="sourceLineNo">100</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache#setVictimCache}<a name="line.100"></a> +<span class="sourceLineNo">101</span> */<a name="line.101"></a> +<span class="sourceLineNo">102</span>@InterfaceAudience.Private<a name="line.102"></a> +<span class="sourceLineNo">103</span>public class BucketCache implements BlockCache, HeapSize {<a name="line.103"></a> +<span class="sourceLineNo">104</span> private static final Logger LOG = LoggerFactory.getLogger(BucketCache.class);<a name="line.104"></a> +<span class="sourceLineNo">105</span><a name="line.105"></a> +<span class="sourceLineNo">106</span> /** Priority buckets config */<a name="line.106"></a> +<span class="sourceLineNo">107</span> static final String SINGLE_FACTOR_CONFIG_NAME = "hbase.bucketcache.single.factor";<a name="line.107"></a> +<span class="sourceLineNo">108</span> static final String MULTI_FACTOR_CONFIG_NAME = "hbase.bucketcache.multi.factor";<a name="line.108"></a> +<span class="sourceLineNo">109</span> static final String MEMORY_FACTOR_CONFIG_NAME = "hbase.bucketcache.memory.factor";<a name="line.109"></a> +<span class="sourceLineNo">110</span> static final String EXTRA_FREE_FACTOR_CONFIG_NAME = "hbase.bucketcache.extrafreefactor";<a name="line.110"></a> +<span class="sourceLineNo">111</span> static final String ACCEPT_FACTOR_CONFIG_NAME = "hbase.bucketcache.acceptfactor";<a name="line.111"></a> +<span class="sourceLineNo">112</span> static final String MIN_FACTOR_CONFIG_NAME = "hbase.bucketcache.minfactor";<a name="line.112"></a> +<span class="sourceLineNo">113</span><a name="line.113"></a> +<span class="sourceLineNo">114</span> /** Priority buckets */<a name="line.114"></a> +<span class="sourceLineNo">115</span> @VisibleForTesting<a name="line.115"></a> +<span class="sourc
<TRUNCATED>