http://git-wip-us.apache.org/repos/asf/hbase-site/blob/9943f14f/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/LruBlockCache.StatisticsThread.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/LruBlockCache.StatisticsThread.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/LruBlockCache.StatisticsThread.html index 1a7da7c..8b24a8e 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/LruBlockCache.StatisticsThread.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/LruBlockCache.StatisticsThread.html @@ -53,1138 +53,1142 @@ <span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.util.ClassSize;<a name="line.45"></a> <span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.util.HasThread;<a name="line.46"></a> <span class="sourceLineNo">047</span>import org.apache.hadoop.util.StringUtils;<a name="line.47"></a> -<span class="sourceLineNo">048</span>import org.codehaus.jackson.annotate.JsonIgnoreProperties;<a name="line.48"></a> -<span class="sourceLineNo">049</span><a name="line.49"></a> -<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.50"></a> -<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.shaded.com.google.common.base.MoreObjects;<a name="line.51"></a> -<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.shaded.com.google.common.base.Objects;<a name="line.52"></a> -<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.shaded.com.google.common.util.concurrent.ThreadFactoryBuilder;<a name="line.53"></a> -<span class="sourceLineNo">054</span><a name="line.54"></a> -<span class="sourceLineNo">055</span>/**<a name="line.55"></a> -<span class="sourceLineNo">056</span> * A block cache implementation that is memory-aware using {@link HeapSize},<a name="line.56"></a> -<span class="sourceLineNo">057</span> * memory-bound using an LRU eviction algorithm, and concurrent: backed by a<a name="line.57"></a> -<span class="sourceLineNo">058</span> * {@link ConcurrentHashMap} and with a non-blocking eviction thread giving<a name="line.58"></a> -<span class="sourceLineNo">059</span> * constant-time {@link #cacheBlock} and {@link #getBlock} operations.<p><a name="line.59"></a> -<span class="sourceLineNo">060</span> *<a name="line.60"></a> -<span class="sourceLineNo">061</span> * Contains three levels of block priority to allow for scan-resistance and in-memory families<a name="line.61"></a> -<span class="sourceLineNo">062</span> * {@link org.apache.hadoop.hbase.HColumnDescriptor#setInMemory(boolean)} (An in-memory column<a name="line.62"></a> -<span class="sourceLineNo">063</span> * family is a column family that should be served from memory if possible):<a name="line.63"></a> -<span class="sourceLineNo">064</span> * single-access, multiple-accesses, and in-memory priority.<a name="line.64"></a> -<span class="sourceLineNo">065</span> * A block is added with an in-memory priority flag if<a name="line.65"></a> -<span class="sourceLineNo">066</span> * {@link org.apache.hadoop.hbase.HColumnDescriptor#isInMemory()}, otherwise a block becomes a<a name="line.66"></a> -<span class="sourceLineNo">067</span> * single access priority the first time it is read into this block cache. If a block is<a name="line.67"></a> -<span class="sourceLineNo">068</span> * accessed again while in cache, it is marked as a multiple access priority block. This<a name="line.68"></a> -<span class="sourceLineNo">069</span> * delineation of blocks is used to prevent scans from thrashing the cache adding a<a name="line.69"></a> -<span class="sourceLineNo">070</span> * least-frequently-used element to the eviction algorithm.<p><a name="line.70"></a> -<span class="sourceLineNo">071</span> *<a name="line.71"></a> -<span class="sourceLineNo">072</span> * Each priority is given its own chunk of the total cache to ensure<a name="line.72"></a> -<span class="sourceLineNo">073</span> * fairness during eviction. Each priority will retain close to its maximum<a name="line.73"></a> -<span class="sourceLineNo">074</span> * size, however, if any priority is not using its entire chunk the others<a name="line.74"></a> -<span class="sourceLineNo">075</span> * are able to grow beyond their chunk size.<p><a name="line.75"></a> -<span class="sourceLineNo">076</span> *<a name="line.76"></a> -<span class="sourceLineNo">077</span> * Instantiated at a minimum with the total size and average block size.<a name="line.77"></a> -<span class="sourceLineNo">078</span> * All sizes are in bytes. The block size is not especially important as this<a name="line.78"></a> -<span class="sourceLineNo">079</span> * cache is fully dynamic in its sizing of blocks. It is only used for<a name="line.79"></a> -<span class="sourceLineNo">080</span> * pre-allocating data structures and in initial heap estimation of the map.<p><a name="line.80"></a> -<span class="sourceLineNo">081</span> *<a name="line.81"></a> -<span class="sourceLineNo">082</span> * The detailed constructor defines the sizes for the three priorities (they<a name="line.82"></a> -<span class="sourceLineNo">083</span> * should total to the <code>maximum size</code> defined). It also sets the levels that<a name="line.83"></a> -<span class="sourceLineNo">084</span> * trigger and control the eviction thread.<p><a name="line.84"></a> -<span class="sourceLineNo">085</span> *<a name="line.85"></a> -<span class="sourceLineNo">086</span> * The <code>acceptable size</code> is the cache size level which triggers the eviction<a name="line.86"></a> -<span class="sourceLineNo">087</span> * process to start. It evicts enough blocks to get the size below the<a name="line.87"></a> -<span class="sourceLineNo">088</span> * minimum size specified.<p><a name="line.88"></a> -<span class="sourceLineNo">089</span> *<a name="line.89"></a> -<span class="sourceLineNo">090</span> * Eviction happens in a separate thread and involves a single full-scan<a name="line.90"></a> -<span class="sourceLineNo">091</span> * of the map. It determines how many bytes must be freed to reach the minimum<a name="line.91"></a> -<span class="sourceLineNo">092</span> * size, and then while scanning determines the fewest least-recently-used<a name="line.92"></a> -<span class="sourceLineNo">093</span> * blocks necessary from each of the three priorities (would be 3 times bytes<a name="line.93"></a> -<span class="sourceLineNo">094</span> * to free). It then uses the priority chunk sizes to evict fairly according<a name="line.94"></a> -<span class="sourceLineNo">095</span> * to the relative sizes and usage.<a name="line.95"></a> -<span class="sourceLineNo">096</span> */<a name="line.96"></a> -<span class="sourceLineNo">097</span>@InterfaceAudience.Private<a name="line.97"></a> -<span class="sourceLineNo">098</span>@JsonIgnoreProperties({"encodingCountsForTest"})<a name="line.98"></a> -<span class="sourceLineNo">099</span>public class LruBlockCache implements ResizableBlockCache, HeapSize {<a name="line.99"></a> -<span class="sourceLineNo">100</span><a name="line.100"></a> -<span class="sourceLineNo">101</span> private static final Log LOG = LogFactory.getLog(LruBlockCache.class);<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> * Percentage of total size that eviction will evict until; e.g. if set to .8, then we will keep<a name="line.104"></a> -<span class="sourceLineNo">105</span> * evicting during an eviction run till the cache size is down to 80% of the total.<a name="line.105"></a> -<span class="sourceLineNo">106</span> */<a name="line.106"></a> -<span class="sourceLineNo">107</span> private static final String LRU_MIN_FACTOR_CONFIG_NAME = "hbase.lru.blockcache.min.factor";<a name="line.107"></a> -<span class="sourceLineNo">108</span><a name="line.108"></a> -<span class="sourceLineNo">109</span> /**<a name="line.109"></a> -<span class="sourceLineNo">110</span> * Acceptable size of cache (no evictions if size < acceptable)<a name="line.110"></a> -<span class="sourceLineNo">111</span> */<a name="line.111"></a> -<span class="sourceLineNo">112</span> private static final String LRU_ACCEPTABLE_FACTOR_CONFIG_NAME =<a name="line.112"></a> -<span class="sourceLineNo">113</span> "hbase.lru.blockcache.acceptable.factor";<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> * Hard capacity limit of cache, will reject any put if size > this * acceptable<a name="line.116"></a> -<span class="sourceLineNo">117</span> */<a name="line.117"></a> -<span class="sourceLineNo">118</span> static final String LRU_HARD_CAPACITY_LIMIT_FACTOR_CONFIG_NAME =<a name="line.118"></a> -<span class="sourceLineNo">119</span> "hbase.lru.blockcache.hard.capacity.limit.factor";<a name="line.119"></a> -<span class="sourceLineNo">120</span> private static final String LRU_SINGLE_PERCENTAGE_CONFIG_NAME =<a name="line.120"></a> -<span class="sourceLineNo">121</span> "hbase.lru.blockcache.single.percentage";<a name="line.121"></a> -<span class="sourceLineNo">122</span> private static final String LRU_MULTI_PERCENTAGE_CONFIG_NAME =<a name="line.122"></a> -<span class="sourceLineNo">123</span> "hbase.lru.blockcache.multi.percentage";<a name="line.123"></a> -<span class="sourceLineNo">124</span> private static final String LRU_MEMORY_PERCENTAGE_CONFIG_NAME =<a name="line.124"></a> -<span class="sourceLineNo">125</span> "hbase.lru.blockcache.memory.percentage";<a name="line.125"></a> -<span class="sourceLineNo">126</span><a name="line.126"></a> -<span class="sourceLineNo">127</span> /**<a name="line.127"></a> -<span class="sourceLineNo">128</span> * Configuration key to force data-block always (except in-memory are too much)<a name="line.128"></a> -<span class="sourceLineNo">129</span> * cached in memory for in-memory hfile, unlike inMemory, which is a column-family<a name="line.129"></a> -<span class="sourceLineNo">130</span> * configuration, inMemoryForceMode is a cluster-wide configuration<a name="line.130"></a> -<span class="sourceLineNo">131</span> */<a name="line.131"></a> -<span class="sourceLineNo">132</span> private static final String LRU_IN_MEMORY_FORCE_MODE_CONFIG_NAME =<a name="line.132"></a> -<span class="sourceLineNo">133</span> "hbase.lru.rs.inmemoryforcemode";<a name="line.133"></a> -<span class="sourceLineNo">134</span><a name="line.134"></a> -<span class="sourceLineNo">135</span> /* Default Configuration Parameters*/<a name="line.135"></a> -<span class="sourceLineNo">136</span><a name="line.136"></a> -<span class="sourceLineNo">137</span> /* Backing Concurrent Map Configuration */<a name="line.137"></a> -<span class="sourceLineNo">138</span> static final float DEFAULT_LOAD_FACTOR = 0.75f;<a name="line.138"></a> -<span class="sourceLineNo">139</span> static final int DEFAULT_CONCURRENCY_LEVEL = 16;<a name="line.139"></a> -<span class="sourceLineNo">140</span><a name="line.140"></a> -<span class="sourceLineNo">141</span> /* Eviction thresholds */<a name="line.141"></a> -<span class="sourceLineNo">142</span> private static final float DEFAULT_MIN_FACTOR = 0.95f;<a name="line.142"></a> -<span class="sourceLineNo">143</span> static final float DEFAULT_ACCEPTABLE_FACTOR = 0.99f;<a name="line.143"></a> -<span class="sourceLineNo">144</span><a name="line.144"></a> -<span class="sourceLineNo">145</span> /* Priority buckets */<a name="line.145"></a> -<span class="sourceLineNo">146</span> private static final float DEFAULT_SINGLE_FACTOR = 0.25f;<a name="line.146"></a> -<span class="sourceLineNo">147</span> private static final float DEFAULT_MULTI_FACTOR = 0.50f;<a name="line.147"></a> -<span class="sourceLineNo">148</span> private static final float DEFAULT_MEMORY_FACTOR = 0.25f;<a name="line.148"></a> -<span class="sourceLineNo">149</span><a name="line.149"></a> -<span class="sourceLineNo">150</span> private static final float DEFAULT_HARD_CAPACITY_LIMIT_FACTOR = 1.2f;<a name="line.150"></a> -<span class="sourceLineNo">151</span><a name="line.151"></a> -<span class="sourceLineNo">152</span> private static final boolean DEFAULT_IN_MEMORY_FORCE_MODE = false;<a name="line.152"></a> -<span class="sourceLineNo">153</span><a name="line.153"></a> -<span class="sourceLineNo">154</span> /* Statistics thread */<a name="line.154"></a> -<span class="sourceLineNo">155</span> private static final int STAT_THREAD_PERIOD = 60 * 5;<a name="line.155"></a> -<span class="sourceLineNo">156</span> private static final String LRU_MAX_BLOCK_SIZE = "hbase.lru.max.block.size";<a name="line.156"></a> -<span class="sourceLineNo">157</span> private static final long DEFAULT_MAX_BLOCK_SIZE = 16L * 1024L * 1024L;<a name="line.157"></a> -<span class="sourceLineNo">158</span><a name="line.158"></a> -<span class="sourceLineNo">159</span> /** Concurrent map (the cache) */<a name="line.159"></a> -<span class="sourceLineNo">160</span> private final Map<BlockCacheKey, LruCachedBlock> map;<a name="line.160"></a> -<span class="sourceLineNo">161</span><a name="line.161"></a> -<span class="sourceLineNo">162</span> /** Eviction lock (locked when eviction in process) */<a name="line.162"></a> -<span class="sourceLineNo">163</span> private final ReentrantLock evictionLock = new ReentrantLock(true);<a name="line.163"></a> -<span class="sourceLineNo">164</span> private final long maxBlockSize;<a name="line.164"></a> -<span class="sourceLineNo">165</span><a name="line.165"></a> -<span class="sourceLineNo">166</span> /** Volatile boolean to track if we are in an eviction process or not */<a name="line.166"></a> -<span class="sourceLineNo">167</span> private volatile boolean evictionInProgress = false;<a name="line.167"></a> -<span class="sourceLineNo">168</span><a name="line.168"></a> -<span class="sourceLineNo">169</span> /** Eviction thread */<a name="line.169"></a> -<span class="sourceLineNo">170</span> private final EvictionThread evictionThread;<a name="line.170"></a> -<span class="sourceLineNo">171</span><a name="line.171"></a> -<span class="sourceLineNo">172</span> /** Statistics thread schedule pool (for heavy debugging, could remove) */<a name="line.172"></a> -<span class="sourceLineNo">173</span> private final ScheduledExecutorService scheduleThreadPool = Executors.newScheduledThreadPool(1,<a name="line.173"></a> -<span class="sourceLineNo">174</span> new ThreadFactoryBuilder().setNameFormat("LruBlockCacheStatsExecutor").setDaemon(true).build());<a name="line.174"></a> -<span class="sourceLineNo">175</span><a name="line.175"></a> -<span class="sourceLineNo">176</span> /** Current size of cache */<a name="line.176"></a> -<span class="sourceLineNo">177</span> private final AtomicLong size;<a name="line.177"></a> -<span class="sourceLineNo">178</span><a name="line.178"></a> -<span class="sourceLineNo">179</span> /** Current number of cached elements */<a name="line.179"></a> -<span class="sourceLineNo">180</span> private final AtomicLong elements;<a name="line.180"></a> -<span class="sourceLineNo">181</span><a name="line.181"></a> -<span class="sourceLineNo">182</span> /** Cache access count (sequential ID) */<a name="line.182"></a> -<span class="sourceLineNo">183</span> private final AtomicLong count;<a name="line.183"></a> -<span class="sourceLineNo">184</span><a name="line.184"></a> -<span class="sourceLineNo">185</span> /** hard capacity limit */<a name="line.185"></a> -<span class="sourceLineNo">186</span> private float hardCapacityLimitFactor;<a name="line.186"></a> -<span class="sourceLineNo">187</span><a name="line.187"></a> -<span class="sourceLineNo">188</span> /** Cache statistics */<a name="line.188"></a> -<span class="sourceLineNo">189</span> private final CacheStats stats;<a name="line.189"></a> -<span class="sourceLineNo">190</span><a name="line.190"></a> -<span class="sourceLineNo">191</span> /** Maximum allowable size of cache (block put if size > max, evict) */<a name="line.191"></a> -<span class="sourceLineNo">192</span> private long maxSize;<a name="line.192"></a> -<span class="sourceLineNo">193</span><a name="line.193"></a> -<span class="sourceLineNo">194</span> /** Approximate block size */<a name="line.194"></a> -<span class="sourceLineNo">195</span> private long blockSize;<a name="line.195"></a> -<span class="sourceLineNo">196</span><a name="line.196"></a> -<span class="sourceLineNo">197</span> /** Acceptable size of cache (no evictions if size < acceptable) */<a name="line.197"></a> -<span class="sourceLineNo">198</span> private float acceptableFactor;<a name="line.198"></a> -<span class="sourceLineNo">199</span><a name="line.199"></a> -<span class="sourceLineNo">200</span> /** Minimum threshold of cache (when evicting, evict until size < min) */<a name="line.200"></a> -<span class="sourceLineNo">201</span> private float minFactor;<a name="line.201"></a> -<span class="sourceLineNo">202</span><a name="line.202"></a> -<span class="sourceLineNo">203</span> /** Single access bucket size */<a name="line.203"></a> -<span class="sourceLineNo">204</span> private float singleFactor;<a name="line.204"></a> -<span class="sourceLineNo">205</span><a name="line.205"></a> -<span class="sourceLineNo">206</span> /** Multiple access bucket size */<a name="line.206"></a> -<span class="sourceLineNo">207</span> private float multiFactor;<a name="line.207"></a> -<span class="sourceLineNo">208</span><a name="line.208"></a> -<span class="sourceLineNo">209</span> /** In-memory bucket size */<a name="line.209"></a> -<span class="sourceLineNo">210</span> private float memoryFactor;<a name="line.210"></a> -<span class="sourceLineNo">211</span><a name="line.211"></a> -<span class="sourceLineNo">212</span> /** Overhead of the structure itself */<a name="line.212"></a> -<span class="sourceLineNo">213</span> private long overhead;<a name="line.213"></a> -<span class="sourceLineNo">214</span><a name="line.214"></a> -<span class="sourceLineNo">215</span> /** Whether in-memory hfile's data block has higher priority when evicting */<a name="line.215"></a> -<span class="sourceLineNo">216</span> private boolean forceInMemory;<a name="line.216"></a> -<span class="sourceLineNo">217</span><a name="line.217"></a> -<span class="sourceLineNo">218</span> /** Where to send victims (blocks evicted/missing from the cache) */<a name="line.218"></a> -<span class="sourceLineNo">219</span> private BlockCache victimHandler = null;<a name="line.219"></a> -<span class="sourceLineNo">220</span><a name="line.220"></a> -<span class="sourceLineNo">221</span> /**<a name="line.221"></a> -<span class="sourceLineNo">222</span> * Default constructor. Specify maximum size and expected average block<a name="line.222"></a> -<span class="sourceLineNo">223</span> * size (approximation is fine).<a name="line.223"></a> -<span class="sourceLineNo">224</span> *<a name="line.224"></a> -<span class="sourceLineNo">225</span> * <p>All other factors will be calculated based on defaults specified in<a name="line.225"></a> -<span class="sourceLineNo">226</span> * this class.<a name="line.226"></a> -<span class="sourceLineNo">227</span> *<a name="line.227"></a> -<span class="sourceLineNo">228</span> * @param maxSize maximum size of cache, in bytes<a name="line.228"></a> -<span class="sourceLineNo">229</span> * @param blockSize approximate size of each block, in bytes<a name="line.229"></a> -<span class="sourceLineNo">230</span> */<a name="line.230"></a> -<span class="sourceLineNo">231</span> public LruBlockCache(long maxSize, long blockSize) {<a name="line.231"></a> -<span class="sourceLineNo">232</span> this(maxSize, blockSize, true);<a name="line.232"></a> -<span class="sourceLineNo">233</span> }<a name="line.233"></a> -<span class="sourceLineNo">234</span><a name="line.234"></a> -<span class="sourceLineNo">235</span> /**<a name="line.235"></a> -<span class="sourceLineNo">236</span> * Constructor used for testing. Allows disabling of the eviction thread.<a name="line.236"></a> -<span class="sourceLineNo">237</span> */<a name="line.237"></a> -<span class="sourceLineNo">238</span> public LruBlockCache(long maxSize, long blockSize, boolean evictionThread) {<a name="line.238"></a> -<span class="sourceLineNo">239</span> this(maxSize, blockSize, evictionThread,<a name="line.239"></a> -<span class="sourceLineNo">240</span> (int) Math.ceil(1.2 * maxSize / blockSize),<a name="line.240"></a> -<span class="sourceLineNo">241</span> DEFAULT_LOAD_FACTOR, DEFAULT_CONCURRENCY_LEVEL,<a name="line.241"></a> -<span class="sourceLineNo">242</span> DEFAULT_MIN_FACTOR, DEFAULT_ACCEPTABLE_FACTOR,<a name="line.242"></a> -<span class="sourceLineNo">243</span> DEFAULT_SINGLE_FACTOR,<a name="line.243"></a> -<span class="sourceLineNo">244</span> DEFAULT_MULTI_FACTOR,<a name="line.244"></a> -<span class="sourceLineNo">245</span> DEFAULT_MEMORY_FACTOR,<a name="line.245"></a> -<span class="sourceLineNo">246</span> DEFAULT_HARD_CAPACITY_LIMIT_FACTOR,<a name="line.246"></a> -<span class="sourceLineNo">247</span> false,<a name="line.247"></a> -<span class="sourceLineNo">248</span> DEFAULT_MAX_BLOCK_SIZE<a name="line.248"></a> -<span class="sourceLineNo">249</span> );<a name="line.249"></a> -<span class="sourceLineNo">250</span> }<a name="line.250"></a> -<span class="sourceLineNo">251</span><a name="line.251"></a> -<span class="sourceLineNo">252</span> public LruBlockCache(long maxSize, long blockSize, boolean evictionThread, Configuration conf) {<a name="line.252"></a> -<span class="sourceLineNo">253</span> this(maxSize, blockSize, evictionThread,<a name="line.253"></a> -<span class="sourceLineNo">254</span> (int) Math.ceil(1.2 * maxSize / blockSize),<a name="line.254"></a> -<span class="sourceLineNo">255</span> DEFAULT_LOAD_FACTOR,<a name="line.255"></a> -<span class="sourceLineNo">256</span> DEFAULT_CONCURRENCY_LEVEL,<a name="line.256"></a> -<span class="sourceLineNo">257</span> conf.getFloat(LRU_MIN_FACTOR_CONFIG_NAME, DEFAULT_MIN_FACTOR),<a name="line.257"></a> -<span class="sourceLineNo">258</span> conf.getFloat(LRU_ACCEPTABLE_FACTOR_CONFIG_NAME, DEFAULT_ACCEPTABLE_FACTOR),<a name="line.258"></a> -<span class="sourceLineNo">259</span> conf.getFloat(LRU_SINGLE_PERCENTAGE_CONFIG_NAME, DEFAULT_SINGLE_FACTOR),<a name="line.259"></a> -<span class="sourceLineNo">260</span> conf.getFloat(LRU_MULTI_PERCENTAGE_CONFIG_NAME, DEFAULT_MULTI_FACTOR),<a name="line.260"></a> -<span class="sourceLineNo">261</span> conf.getFloat(LRU_MEMORY_PERCENTAGE_CONFIG_NAME, DEFAULT_MEMORY_FACTOR),<a name="line.261"></a> -<span class="sourceLineNo">262</span> conf.getFloat(LRU_HARD_CAPACITY_LIMIT_FACTOR_CONFIG_NAME,<a name="line.262"></a> -<span class="sourceLineNo">263</span> DEFAULT_HARD_CAPACITY_LIMIT_FACTOR),<a name="line.263"></a> -<span class="sourceLineNo">264</span> conf.getBoolean(LRU_IN_MEMORY_FORCE_MODE_CONFIG_NAME, DEFAULT_IN_MEMORY_FORCE_MODE),<a name="line.264"></a> -<span class="sourceLineNo">265</span> conf.getLong(LRU_MAX_BLOCK_SIZE, DEFAULT_MAX_BLOCK_SIZE)<a name="line.265"></a> -<span class="sourceLineNo">266</span> );<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> public LruBlockCache(long maxSize, long blockSize, Configuration conf) {<a name="line.269"></a> -<span class="sourceLineNo">270</span> this(maxSize, blockSize, true, conf);<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> * Configurable constructor. Use this constructor if not using defaults.<a name="line.274"></a> -<span class="sourceLineNo">275</span> *<a name="line.275"></a> -<span class="sourceLineNo">276</span> * @param maxSize maximum size of this cache, in bytes<a name="line.276"></a> -<span class="sourceLineNo">277</span> * @param blockSize expected average size of blocks, in bytes<a name="line.277"></a> -<span class="sourceLineNo">278</span> * @param evictionThread whether to run evictions in a bg thread or not<a name="line.278"></a> -<span class="sourceLineNo">279</span> * @param mapInitialSize initial size of backing ConcurrentHashMap<a name="line.279"></a> -<span class="sourceLineNo">280</span> * @param mapLoadFactor initial load factor of backing ConcurrentHashMap<a name="line.280"></a> -<span class="sourceLineNo">281</span> * @param mapConcurrencyLevel initial concurrency factor for backing CHM<a name="line.281"></a> -<span class="sourceLineNo">282</span> * @param minFactor percentage of total size that eviction will evict until<a name="line.282"></a> -<span class="sourceLineNo">283</span> * @param acceptableFactor percentage of total size that triggers eviction<a name="line.283"></a> -<span class="sourceLineNo">284</span> * @param singleFactor percentage of total size for single-access blocks<a name="line.284"></a> -<span class="sourceLineNo">285</span> * @param multiFactor percentage of total size for multiple-access blocks<a name="line.285"></a> -<span class="sourceLineNo">286</span> * @param memoryFactor percentage of total size for in-memory blocks<a name="line.286"></a> -<span class="sourceLineNo">287</span> */<a name="line.287"></a> -<span class="sourceLineNo">288</span> public LruBlockCache(long maxSize, long blockSize, boolean evictionThread,<a name="line.288"></a> -<span class="sourceLineNo">289</span> int mapInitialSize, float mapLoadFactor, int mapConcurrencyLevel,<a name="line.289"></a> -<span class="sourceLineNo">290</span> float minFactor, float acceptableFactor, float 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name="line.299"></a> -<span class="sourceLineNo">300</span> throw new IllegalArgumentException("minFactor must be smaller than acceptableFactor");<a name="line.300"></a> -<span class="sourceLineNo">301</span> }<a name="line.301"></a> -<span class="sourceLineNo">302</span> if (minFactor >= 1.0f || acceptableFactor >= 1.0f) {<a name="line.302"></a> -<span class="sourceLineNo">303</span> throw new IllegalArgumentException("all factors must be < 1");<a name="line.303"></a> -<span class="sourceLineNo">304</span> }<a name="line.304"></a> -<span class="sourceLineNo">305</span> this.maxSize = maxSize;<a name="line.305"></a> -<span class="sourceLineNo">306</span> this.blockSize = blockSize;<a name="line.306"></a> -<span class="sourceLineNo">307</span> this.forceInMemory = forceInMemory;<a name="line.307"></a> -<span class="sourceLineNo">308</span> map = new ConcurrentHashMap<>(mapInitialSize, mapLoadFactor, mapConcurrencyLevel);<a name="line.308"></a> -<span class="sourceLineNo">309</span> this.minFactor = minFactor;<a name="line.309"></a> -<span class="sourceLineNo">310</span> this.acceptableFactor = acceptableFactor;<a name="line.310"></a> -<span class="sourceLineNo">311</span> this.singleFactor = singleFactor;<a name="line.311"></a> -<span class="sourceLineNo">312</span> this.multiFactor = multiFactor;<a name="line.312"></a> -<span class="sourceLineNo">313</span> this.memoryFactor = memoryFactor;<a name="line.313"></a> -<span class="sourceLineNo">314</span> this.stats = new CacheStats(this.getClass().getSimpleName());<a name="line.314"></a> -<span class="sourceLineNo">315</span> this.count = new AtomicLong(0);<a name="line.315"></a> -<span class="sourceLineNo">316</span> this.elements = new AtomicLong(0);<a name="line.316"></a> -<span class="sourceLineNo">317</span> this.overhead = calculateOverhead(maxSize, blockSize, mapConcurrencyLevel);<a name="line.317"></a> -<span class="sourceLineNo">318</span> this.size = new AtomicLong(this.overhead);<a name="line.318"></a> 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This is harmless and can happen in rare cases (see HBASE-8547)";<a name="line.378"></a> -<span class="sourceLineNo">379</span> LOG.warn(msg);<a name="line.379"></a> -<span class="sourceLineNo">380</span> return;<a name="line.380"></a> -<span class="sourceLineNo">381</span> }<a name="line.381"></a> -<span class="sourceLineNo">382</span> long currentSize = size.get();<a name="line.382"></a> -<span class="sourceLineNo">383</span> long currentAcceptableSize = acceptableSize();<a name="line.383"></a> -<span class="sourceLineNo">384</span> long hardLimitSize = (long) (hardCapacityLimitFactor * currentAcceptableSize);<a name="line.384"></a> -<span class="sourceLineNo">385</span> if (currentSize >= hardLimitSize) {<a name="line.385"></a> -<span class="sourceLineNo">386</span> stats.failInsert();<a name="line.386"></a> -<span class="sourceLineNo">387</span> if (LOG.isTraceEnabled()) {<a name="line.387"></a> -<span class="sourceLineNo">388</span> LOG.trace("LruBlockCache current size " + StringUtils.byteDesc(currentSize)<a name="line.388"></a> -<span class="sourceLineNo">389</span> + " has exceeded acceptable size " + StringUtils.byteDesc(currentAcceptableSize) + "."<a name="line.389"></a> -<span class="sourceLineNo">390</span> + " The hard limit size is " + StringUtils.byteDesc(hardLimitSize)<a name="line.390"></a> -<span class="sourceLineNo">391</span> + ", failed to put cacheKey:" + cacheKey + " into LruBlockCache.");<a name="line.391"></a> -<span class="sourceLineNo">392</span> }<a name="line.392"></a> -<span class="sourceLineNo">393</span> if (!evictionInProgress) {<a name="line.393"></a> -<span class="sourceLineNo">394</span> runEviction();<a name="line.394"></a> -<span class="sourceLineNo">395</span> }<a name="line.395"></a> -<span class="sourceLineNo">396</span> return;<a name="line.396"></a> -<span class="sourceLineNo">397</span> }<a name="line.397"></a> -<span class="sourceLineNo">398</span> cb = new LruCachedBlock(cacheKey, buf, count.incrementAndGet(), inMemory);<a name="line.398"></a> -<span class="sourceLineNo">399</span> long newSize = updateSizeMetrics(cb, false);<a name="line.399"></a> -<span class="sourceLineNo">400</span> map.put(cacheKey, cb);<a name="line.400"></a> -<span class="sourceLineNo">401</span> long val = elements.incrementAndGet();<a name="line.401"></a> -<span class="sourceLineNo">402</span> if (LOG.isTraceEnabled()) {<a name="line.402"></a> -<span class="sourceLineNo">403</span> long size = map.size();<a name="line.403"></a> -<span class="sourceLineNo">404</span> assertCounterSanity(size, val);<a name="line.404"></a> -<span class="sourceLineNo">405</span> }<a name="line.405"></a> -<span class="sourceLineNo">406</span> if (newSize > currentAcceptableSize && !evictionInProgress) {<a name="line.406"></a> -<span class="sourceLineNo">407</span> runEviction();<a name="line.407"></a> -<span class="sourceLineNo">408</span> }<a name="line.408"></a> -<span class="sourceLineNo">409</span> }<a name="line.409"></a> -<span class="sourceLineNo">410</span><a name="line.410"></a> -<span class="sourceLineNo">411</span> /**<a name="line.411"></a> -<span class="sourceLineNo">412</span> * Sanity-checking for parity between actual block cache content and metrics.<a name="line.412"></a> -<span class="sourceLineNo">413</span> * Intended only for use with TRACE level logging and -ea JVM.<a name="line.413"></a> -<span class="sourceLineNo">414</span> */<a name="line.414"></a> -<span class="sourceLineNo">415</span> private static void assertCounterSanity(long mapSize, long counterVal) {<a name="line.415"></a> -<span class="sourceLineNo">416</span> if (counterVal < 0) {<a name="line.416"></a> -<span class="sourceLineNo">417</span> LOG.trace("counterVal overflow. 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class="sourceLineNo">428</span> }<a name="line.428"></a> -<span class="sourceLineNo">429</span><a name="line.429"></a> -<span class="sourceLineNo">430</span> private int compare(Cacheable left, Cacheable right) {<a name="line.430"></a> -<span class="sourceLineNo">431</span> ByteBuffer l = ByteBuffer.allocate(left.getSerializedLength());<a name="line.431"></a> -<span class="sourceLineNo">432</span> left.serialize(l);<a name="line.432"></a> -<span class="sourceLineNo">433</span> ByteBuffer r = ByteBuffer.allocate(right.getSerializedLength());<a name="line.433"></a> -<span class="sourceLineNo">434</span> right.serialize(r);<a name="line.434"></a> -<span class="sourceLineNo">435</span> return Bytes.compareTo(l.array(), l.arrayOffset(), l.limit(),<a name="line.435"></a> -<span class="sourceLineNo">436</span> r.array(), r.arrayOffset(), r.limit());<a name="line.436"></a> -<span class="sourceLineNo">437</span> }<a name="line.437"></a> -<span class="sourceLineNo">438</span><a name="line.438"></a> -<span class="sourceLineNo">439</span> /**<a name="line.439"></a> -<span class="sourceLineNo">440</span> * Cache the block with the specified name and buffer.<a name="line.440"></a> -<span class="sourceLineNo">441</span> * <p><a name="line.441"></a> -<span class="sourceLineNo">442</span> *<a name="line.442"></a> -<span class="sourceLineNo">443</span> * @param cacheKey block's cache key<a name="line.443"></a> -<span class="sourceLineNo">444</span> * @param buf block buffer<a name="line.444"></a> -<span class="sourceLineNo">445</span> */<a name="line.445"></a> -<span class="sourceLineNo">446</span> public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {<a name="line.446"></a> -<span class="sourceLineNo">447</span> cacheBlock(cacheKey, buf, false, false);<a name="line.447"></a> -<span class="sourceLineNo">448</span> }<a name="line.448"></a> -<span class="sourceLineNo">449</span><a name="line.449"></a> -<span class="sourceLineNo">450</span> /**<a 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<TRUNCATED>
