http://git-wip-us.apache.org/repos/asf/hbase-site/blob/07e68d46/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html index a614cd4..01801ca 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html @@ -60,520 +60,520 @@ <span class="sourceLineNo">052</span>import java.util.concurrent.locks.ReentrantLock;<a name="line.52"></a> <span class="sourceLineNo">053</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.53"></a> <span class="sourceLineNo">054</span><a name="line.54"></a> -<span class="sourceLineNo">055</span>import org.apache.commons.logging.Log;<a name="line.55"></a> -<span class="sourceLineNo">056</span>import org.apache.commons.logging.LogFactory;<a name="line.56"></a> -<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<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><a name="line.77"></a> -<span class="sourceLineNo">078</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.78"></a> -<span class="sourceLineNo">079</span>import org.apache.hadoop.hbase.shaded.com.google.common.util.concurrent.ThreadFactoryBuilder;<a name="line.79"></a> +<span class="sourceLineNo">055</span>import com.google.common.base.Preconditions;<a name="line.55"></a> +<span class="sourceLineNo">056</span>import org.apache.commons.logging.Log;<a name="line.56"></a> +<span class="sourceLineNo">057</span>import org.apache.commons.logging.LogFactory;<a name="line.57"></a> +<span class="sourceLineNo">058</span>import org.apache.hadoop.conf.Configuration;<a name="line.58"></a> +<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.59"></a> +<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.60"></a> +<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.io.HeapSize;<a name="line.61"></a> +<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.io.hfile.BlockCache;<a name="line.62"></a> +<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.63"></a> +<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheUtil;<a name="line.64"></a> +<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.io.hfile.BlockPriority;<a name="line.65"></a> +<span class="sourceLineNo">066</span>import org.apache.hadoop.hbase.io.hfile.BlockType;<a name="line.66"></a> +<span class="sourceLineNo">067</span>import org.apache.hadoop.hbase.io.hfile.CacheStats;<a name="line.67"></a> +<span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.io.hfile.Cacheable;<a name="line.68"></a> +<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.io.hfile.Cacheable.MemoryType;<a name="line.69"></a> +<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializer;<a name="line.70"></a> +<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializerIdManager;<a name="line.71"></a> +<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.io.hfile.CachedBlock;<a name="line.72"></a> +<span class="sourceLineNo">073</span>import org.apache.hadoop.hbase.io.hfile.HFileBlock;<a name="line.73"></a> +<span class="sourceLineNo">074</span>import org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.74"></a> +<span class="sourceLineNo">075</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.75"></a> +<span class="sourceLineNo">076</span>import org.apache.hadoop.hbase.util.HasThread;<a name="line.76"></a> +<span class="sourceLineNo">077</span>import org.apache.hadoop.hbase.util.IdReadWriteLock;<a name="line.77"></a> +<span class="sourceLineNo">078</span>import org.apache.hadoop.hbase.util.IdReadWriteLock.ReferenceType;<a name="line.78"></a> +<span class="sourceLineNo">079</span>import org.apache.hadoop.util.StringUtils;<a name="line.79"></a> <span class="sourceLineNo">080</span><a name="line.80"></a> -<span class="sourceLineNo">081</span>/**<a name="line.81"></a> -<span class="sourceLineNo">082</span> * BucketCache uses {@link BucketAllocator} to allocate/free blocks, and uses<a name="line.82"></a> -<span class="sourceLineNo">083</span> * BucketCache#ramCache and BucketCache#backingMap in order to<a name="line.83"></a> -<span class="sourceLineNo">084</span> * determine if a given element is in the cache. The bucket cache can use on-heap or<a name="line.84"></a> -<span class="sourceLineNo">085</span> * off-heap memory {@link ByteBufferIOEngine} or in a file {@link FileIOEngine} to<a name="line.85"></a> -<span class="sourceLineNo">086</span> * store/read the block data.<a name="line.86"></a> -<span class="sourceLineNo">087</span> *<a name="line.87"></a> -<span class="sourceLineNo">088</span> * <p>Eviction is via a similar algorithm as used in<a name="line.88"></a> -<span class="sourceLineNo">089</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache}<a name="line.89"></a> +<span class="sourceLineNo">081</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.81"></a> +<span class="sourceLineNo">082</span>import org.apache.hadoop.hbase.shaded.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>BucketCache can be used as mainly a block cache (see<a name="line.91"></a> -<span class="sourceLineNo">092</span> * {@link org.apache.hadoop.hbase.io.hfile.CombinedBlockCache}), combined with<a name="line.92"></a> -<span class="sourceLineNo">093</span> * LruBlockCache to decrease CMS GC and heap fragmentation.<a name="line.93"></a> -<span class="sourceLineNo">094</span> *<a name="line.94"></a> -<span class="sourceLineNo">095</span> * <p>It also can be used as a secondary cache (e.g. using a file on ssd/fusionio to store<a name="line.95"></a> -<span class="sourceLineNo">096</span> * blocks) to enlarge cache space via<a name="line.96"></a> -<span class="sourceLineNo">097</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache#setVictimCache}<a name="line.97"></a> -<span class="sourceLineNo">098</span> */<a name="line.98"></a> -<span class="sourceLineNo">099</span>@InterfaceAudience.Private<a name="line.99"></a> -<span class="sourceLineNo">100</span>public class BucketCache implements BlockCache, HeapSize {<a name="line.100"></a> -<span class="sourceLineNo">101</span> private static final Log LOG = LogFactory.getLog(BucketCache.class);<a name="line.101"></a> -<span class="sourceLineNo">102</span><a name="line.102"></a> -<span class="sourceLineNo">103</span> /** Priority buckets */<a name="line.103"></a> -<span class="sourceLineNo">104</span> private static final float DEFAULT_SINGLE_FACTOR = 0.25f;<a name="line.104"></a> -<span class="sourceLineNo">105</span> private static final float DEFAULT_MULTI_FACTOR = 0.50f;<a name="line.105"></a> -<span class="sourceLineNo">106</span> private static final float DEFAULT_MEMORY_FACTOR = 0.25f;<a name="line.106"></a> -<span class="sourceLineNo">107</span> private static final float DEFAULT_EXTRA_FREE_FACTOR = 0.10f;<a name="line.107"></a> -<span class="sourceLineNo">108</span><a name="line.108"></a> -<span class="sourceLineNo">109</span> private static final float DEFAULT_ACCEPT_FACTOR = 0.95f;<a name="line.109"></a> -<span class="sourceLineNo">110</span> private static final float DEFAULT_MIN_FACTOR = 0.85f;<a name="line.110"></a> -<span class="sourceLineNo">111</span><a name="line.111"></a> -<span class="sourceLineNo">112</span> // Number of blocks to clear for each of the bucket size that is full<a name="line.112"></a> -<span class="sourceLineNo">113</span> private static final int DEFAULT_FREE_ENTIRE_BLOCK_FACTOR = 2;<a name="line.113"></a> -<span class="sourceLineNo">114</span><a name="line.114"></a> -<span class="sourceLineNo">115</span> /** Statistics thread */<a name="line.115"></a> -<span class="sourceLineNo">116</span> private static final int statThreadPeriod = 5 * 60;<a name="line.116"></a> -<span class="sourceLineNo">117</span><a name="line.117"></a> -<span class="sourceLineNo">118</span> final static int DEFAULT_WRITER_THREADS = 3;<a name="line.118"></a> -<span class="sourceLineNo">119</span> final static int DEFAULT_WRITER_QUEUE_ITEMS = 64;<a name="line.119"></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 Log LOG = LogFactory.getLog(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="sourceLineNo">116</span> static final float DEFAULT_SINGLE_FACTOR = 0.25f;<a name="line.116"></a> +<span class="sourceLineNo">117</span> static final float DEFAULT_MULTI_FACTOR = 0.50f;<a name="line.117"></a> +<span class="sourceLineNo">118</span> static final float DEFAULT_MEMORY_FACTOR = 0.25f;<a name="line.118"></a> +<span class="sourceLineNo">119</span> static final float DEFAULT_MIN_FACTOR = 0.85f;<a name="line.119"></a> <span class="sourceLineNo">120</span><a name="line.120"></a> -<span class="sourceLineNo">121</span> // Store/read block data<a name="line.121"></a> -<span class="sourceLineNo">122</span> final IOEngine ioEngine;<a name="line.122"></a> +<span class="sourceLineNo">121</span> private static final float DEFAULT_EXTRA_FREE_FACTOR = 0.10f;<a name="line.121"></a> +<span class="sourceLineNo">122</span> private static final float DEFAULT_ACCEPT_FACTOR = 0.95f;<a name="line.122"></a> <span class="sourceLineNo">123</span><a name="line.123"></a> -<span class="sourceLineNo">124</span> // Store the block in this map before writing it to cache<a name="line.124"></a> -<span class="sourceLineNo">125</span> @VisibleForTesting<a name="line.125"></a> -<span class="sourceLineNo">126</span> final ConcurrentMap<BlockCacheKey, RAMQueueEntry> ramCache;<a name="line.126"></a> -<span class="sourceLineNo">127</span> // In this map, store the block's meta data like offset, length<a name="line.127"></a> -<span class="sourceLineNo">128</span> @VisibleForTesting<a name="line.128"></a> -<span class="sourceLineNo">129</span> ConcurrentMap<BlockCacheKey, BucketEntry> backingMap;<a name="line.129"></a> -<span class="sourceLineNo">130</span><a name="line.130"></a> -<span class="sourceLineNo">131</span> /**<a name="line.131"></a> -<span class="sourceLineNo">132</span> * Flag if the cache is enabled or not... We shut it off if there are IO<a name="line.132"></a> -<span class="sourceLineNo">133</span> * errors for some time, so that Bucket IO exceptions/errors don't bring down<a name="line.133"></a> -<span class="sourceLineNo">134</span> * the HBase server.<a name="line.134"></a> -<span class="sourceLineNo">135</span> */<a name="line.135"></a> -<span class="sourceLineNo">136</span> private volatile boolean cacheEnabled;<a name="line.136"></a> -<span class="sourceLineNo">137</span><a name="line.137"></a> -<span class="sourceLineNo">138</span> /**<a name="line.138"></a> -<span class="sourceLineNo">139</span> * A list of writer queues. We have a queue per {@link WriterThread} we have running.<a name="line.139"></a> -<span class="sourceLineNo">140</span> * In other words, the work adding blocks to the BucketCache is divided up amongst the<a name="line.140"></a> -<span class="sourceLineNo">141</span> * running WriterThreads. Its done by taking hash of the cache key modulo queue count.<a name="line.141"></a> -<span class="sourceLineNo">142</span> * WriterThread when it runs takes whatever has been recently added and 'drains' the entries<a name="line.142"></a> -<span class="sourceLineNo">143</span> * to the BucketCache. It then updates the ramCache and backingMap accordingly.<a name="line.143"></a> -<span class="sourceLineNo">144</span> */<a name="line.144"></a> -<span class="sourceLineNo">145</span> @VisibleForTesting<a name="line.145"></a> -<span class="sourceLineNo">146</span> final ArrayList<BlockingQueue<RAMQueueEntry>> writerQueues = new ArrayList<>();<a name="line.146"></a> -<span class="sourceLineNo">147</span> @VisibleForTesting<a name="line.147"></a> -<span class="sourceLineNo">148</span> final WriterThread[] writerThreads;<a name="line.148"></a> +<span class="sourceLineNo">124</span> // Number of blocks to clear for each of the bucket size that is full<a name="line.124"></a> +<span class="sourceLineNo">125</span> private static final int DEFAULT_FREE_ENTIRE_BLOCK_FACTOR = 2;<a name="line.125"></a> +<span class="sourceLineNo">126</span><a name="line.126"></a> +<span class="sourceLineNo">127</span> /** Statistics thread */<a name="line.127"></a> +<span class="sourceLineNo">128</span> private static final int statThreadPeriod = 5 * 60;<a name="line.128"></a> +<span class="sourceLineNo">129</span><a name="line.129"></a> +<span class="sourceLineNo">130</span> final static int DEFAULT_WRITER_THREADS = 3;<a name="line.130"></a> +<span class="sourceLineNo">131</span> final static int DEFAULT_WRITER_QUEUE_ITEMS = 64;<a name="line.131"></a> +<span class="sourceLineNo">132</span><a name="line.132"></a> +<span class="sourceLineNo">133</span> // Store/read block data<a name="line.133"></a> +<span class="sourceLineNo">134</span> final IOEngine ioEngine;<a name="line.134"></a> +<span class="sourceLineNo">135</span><a name="line.135"></a> +<span class="sourceLineNo">136</span> // Store the block in this map before writing it to cache<a name="line.136"></a> +<span class="sourceLineNo">137</span> @VisibleForTesting<a name="line.137"></a> +<span class="sourceLineNo">138</span> final ConcurrentMap<BlockCacheKey, RAMQueueEntry> ramCache;<a name="line.138"></a> +<span class="sourceLineNo">139</span> // In this map, store the block's meta data like offset, length<a name="line.139"></a> +<span class="sourceLineNo">140</span> @VisibleForTesting<a name="line.140"></a> +<span class="sourceLineNo">141</span> ConcurrentMap<BlockCacheKey, BucketEntry> backingMap;<a name="line.141"></a> +<span class="sourceLineNo">142</span><a name="line.142"></a> +<span class="sourceLineNo">143</span> /**<a name="line.143"></a> +<span class="sourceLineNo">144</span> * Flag if the cache is enabled or not... We shut it off if there are IO<a name="line.144"></a> +<span class="sourceLineNo">145</span> * errors for some time, so that Bucket IO exceptions/errors don't bring down<a name="line.145"></a> +<span class="sourceLineNo">146</span> * the HBase server.<a name="line.146"></a> +<span class="sourceLineNo">147</span> */<a name="line.147"></a> +<span class="sourceLineNo">148</span> private volatile boolean cacheEnabled;<a name="line.148"></a> <span class="sourceLineNo">149</span><a name="line.149"></a> -<span class="sourceLineNo">150</span> /** Volatile boolean to track if free space is in process or not */<a name="line.150"></a> -<span class="sourceLineNo">151</span> private volatile boolean freeInProgress = false;<a name="line.151"></a> -<span class="sourceLineNo">152</span> private final Lock freeSpaceLock = new ReentrantLock();<a name="line.152"></a> -<span class="sourceLineNo">153</span><a name="line.153"></a> -<span class="sourceLineNo">154</span> private UniqueIndexMap<Integer> deserialiserMap = new UniqueIndexMap<>();<a name="line.154"></a> -<span class="sourceLineNo">155</span><a name="line.155"></a> -<span class="sourceLineNo">156</span> private final AtomicLong realCacheSize = new AtomicLong(0);<a name="line.156"></a> -<span class="sourceLineNo">157</span> private final AtomicLong heapSize = new AtomicLong(0);<a name="line.157"></a> -<span class="sourceLineNo">158</span> /** Current number of cached elements */<a name="line.158"></a> -<span class="sourceLineNo">159</span> private final AtomicLong blockNumber = new AtomicLong(0);<a name="line.159"></a> -<span class="sourceLineNo">160</span><a name="line.160"></a> -<span class="sourceLineNo">161</span> /** Cache access count (sequential ID) */<a name="line.161"></a> -<span class="sourceLineNo">162</span> private final AtomicLong accessCount = new AtomicLong(0);<a name="line.162"></a> -<span class="sourceLineNo">163</span><a name="line.163"></a> -<span class="sourceLineNo">164</span> private static final int DEFAULT_CACHE_WAIT_TIME = 50;<a name="line.164"></a> -<span class="sourceLineNo">165</span> // Used in test now. If the flag is false and the cache speed is very fast,<a name="line.165"></a> -<span class="sourceLineNo">166</span> // bucket cache will skip some blocks when caching. If the flag is true, we<a name="line.166"></a> -<span class="sourceLineNo">167</span> // will wait blocks flushed to IOEngine for some time when caching<a name="line.167"></a> -<span class="sourceLineNo">168</span> boolean wait_when_cache = false;<a name="line.168"></a> -<span class="sourceLineNo">169</span><a name="line.169"></a> -<span class="sourceLineNo">170</span> private final BucketCacheStats cacheStats = new BucketCacheStats();<a name="line.170"></a> -<span class="sourceLineNo">171</span><a name="line.171"></a> -<span class="sourceLineNo">172</span> private final String persistencePath;<a name="line.172"></a> -<span class="sourceLineNo">173</span> private final long cacheCapacity;<a name="line.173"></a> -<span class="sourceLineNo">174</span> /** Approximate block size */<a name="line.174"></a> -<span class="sourceLineNo">175</span> private final long blockSize;<a name="line.175"></a> -<span class="sourceLineNo">176</span><a name="line.176"></a> -<span class="sourceLineNo">177</span> /** Duration of IO errors tolerated before we disable cache, 1 min as default */<a name="line.177"></a> -<span class="sourceLineNo">178</span> private final int ioErrorsTolerationDuration;<a name="line.178"></a> -<span class="sourceLineNo">179</span> // 1 min<a name="line.179"></a> -<span class="sourceLineNo">180</span> public static final int DEFAULT_ERROR_TOLERATION_DURATION = 60 * 1000;<a name="line.180"></a> +<span class="sourceLineNo">150</span> /**<a name="line.150"></a> +<span class="sourceLineNo">151</span> * A list of writer queues. We have a queue per {@link WriterThread} we have running.<a name="line.151"></a> +<span class="sourceLineNo">152</span> * In other words, the work adding blocks to the BucketCache is divided up amongst the<a name="line.152"></a> +<span class="sourceLineNo">153</span> * running WriterThreads. Its done by taking hash of the cache key modulo queue count.<a name="line.153"></a> +<span class="sourceLineNo">154</span> * WriterThread when it runs takes whatever has been recently added and 'drains' the entries<a name="line.154"></a> +<span class="sourceLineNo">155</span> * to the BucketCache. It then updates the ramCache and backingMap accordingly.<a name="line.155"></a> +<span class="sourceLineNo">156</span> */<a name="line.156"></a> +<span class="sourceLineNo">157</span> @VisibleForTesting<a name="line.157"></a> +<span class="sourceLineNo">158</span> final ArrayList<BlockingQueue<RAMQueueEntry>> writerQueues = new ArrayList<>();<a name="line.158"></a> +<span class="sourceLineNo">159</span> @VisibleForTesting<a name="line.159"></a> +<span class="sourceLineNo">160</span> final WriterThread[] writerThreads;<a name="line.160"></a> +<span class="sourceLineNo">161</span><a name="line.161"></a> +<span class="sourceLineNo">162</span> /** Volatile boolean to track if free space is in process or not */<a name="line.162"></a> +<span class="sourceLineNo">163</span> private volatile boolean freeInProgress = false;<a name="line.163"></a> +<span class="sourceLineNo">164</span> private final Lock freeSpaceLock = new ReentrantLock();<a name="line.164"></a> +<span class="sourceLineNo">165</span><a name="line.165"></a> +<span class="sourceLineNo">166</span> private UniqueIndexMap<Integer> deserialiserMap = new UniqueIndexMap<>();<a name="line.166"></a> +<span class="sourceLineNo">167</span><a name="line.167"></a> +<span class="sourceLineNo">168</span> private final AtomicLong realCacheSize = new AtomicLong(0);<a name="line.168"></a> +<span class="sourceLineNo">169</span> private final AtomicLong heapSize = new AtomicLong(0);<a name="line.169"></a> +<span class="sourceLineNo">170</span> /** Current number of cached elements */<a name="line.170"></a> +<span class="sourceLineNo">171</span> private final AtomicLong blockNumber = new AtomicLong(0);<a name="line.171"></a> +<span class="sourceLineNo">172</span><a name="line.172"></a> +<span class="sourceLineNo">173</span> /** Cache access count (sequential ID) */<a name="line.173"></a> +<span class="sourceLineNo">174</span> private final AtomicLong accessCount = new AtomicLong(0);<a name="line.174"></a> +<span class="sourceLineNo">175</span><a name="line.175"></a> +<span class="sourceLineNo">176</span> private static final int DEFAULT_CACHE_WAIT_TIME = 50;<a name="line.176"></a> +<span class="sourceLineNo">177</span> // Used in test now. If the flag is false and the cache speed is very fast,<a name="line.177"></a> +<span class="sourceLineNo">178</span> // bucket cache will skip some blocks when caching. If the flag is true, we<a name="line.178"></a> +<span class="sourceLineNo">179</span> // will wait blocks flushed to IOEngine for some time when caching<a name="line.179"></a> +<span class="sourceLineNo">180</span> boolean wait_when_cache = false;<a name="line.180"></a> <span class="sourceLineNo">181</span><a name="line.181"></a> -<span class="sourceLineNo">182</span> // Start time of first IO error when reading or writing IO Engine, it will be<a name="line.182"></a> -<span class="sourceLineNo">183</span> // reset after a successful read/write.<a name="line.183"></a> -<span class="sourceLineNo">184</span> private volatile long ioErrorStartTime = -1;<a name="line.184"></a> -<span class="sourceLineNo">185</span><a name="line.185"></a> -<span class="sourceLineNo">186</span> /**<a name="line.186"></a> -<span class="sourceLineNo">187</span> * A ReentrantReadWriteLock to lock on a particular block identified by offset.<a name="line.187"></a> -<span class="sourceLineNo">188</span> * The purpose of this is to avoid freeing the block which is being read.<a name="line.188"></a> -<span class="sourceLineNo">189</span> * <p><a name="line.189"></a> -<span class="sourceLineNo">190</span> * Key set of offsets in BucketCache is limited so soft reference is the best choice here.<a name="line.190"></a> -<span class="sourceLineNo">191</span> */<a name="line.191"></a> -<span class="sourceLineNo">192</span> @VisibleForTesting<a name="line.192"></a> -<span class="sourceLineNo">193</span> final IdReadWriteLock offsetLock = new IdReadWriteLock(ReferenceType.SOFT);<a name="line.193"></a> -<span class="sourceLineNo">194</span><a name="line.194"></a> -<span class="sourceLineNo">195</span> private final NavigableSet<BlockCacheKey> blocksByHFile =<a name="line.195"></a> -<span class="sourceLineNo">196</span> new ConcurrentSkipListSet<>(new Comparator<BlockCacheKey>() {<a name="line.196"></a> -<span class="sourceLineNo">197</span> @Override<a name="line.197"></a> -<span class="sourceLineNo">198</span> public int compare(BlockCacheKey a, BlockCacheKey b) {<a name="line.198"></a> -<span class="sourceLineNo">199</span> int nameComparison = a.getHfileName().compareTo(b.getHfileName());<a name="line.199"></a> -<span class="sourceLineNo">200</span> if (nameComparison != 0) {<a name="line.200"></a> -<span class="sourceLineNo">201</span> return nameComparison;<a name="line.201"></a> -<span class="sourceLineNo">202</span> }<a name="line.202"></a> -<span class="sourceLineNo">203</span><a name="line.203"></a> -<span class="sourceLineNo">204</span> if (a.getOffset() == b.getOffset()) {<a name="line.204"></a> -<span class="sourceLineNo">205</span> return 0;<a name="line.205"></a> -<span class="sourceLineNo">206</span> } else if (a.getOffset() < b.getOffset()) {<a name="line.206"></a> -<span class="sourceLineNo">207</span> return -1;<a name="line.207"></a> -<span class="sourceLineNo">208</span> }<a name="line.208"></a> -<span class="sourceLineNo">209</span> return 1;<a name="line.209"></a> -<span class="sourceLineNo">210</span> }<a name="line.210"></a> -<span class="sourceLineNo">211</span> });<a name="line.211"></a> -<span class="sourceLineNo">212</span><a name="line.212"></a> -<span class="sourceLineNo">213</span> /** Statistics thread schedule pool (for heavy debugging, could remove) */<a name="line.213"></a> -<span class="sourceLineNo">214</span> private final ScheduledExecutorService scheduleThreadPool = Executors.newScheduledThreadPool(1,<a name="line.214"></a> -<span class="sourceLineNo">215</span> new ThreadFactoryBuilder().setNameFormat("BucketCacheStatsExecutor").setDaemon(true).build());<a name="line.215"></a> -<span class="sourceLineNo">216</span><a name="line.216"></a> -<span class="sourceLineNo">217</span> // Allocate or free space for the block<a name="line.217"></a> -<span class="sourceLineNo">218</span> private BucketAllocator bucketAllocator;<a name="line.218"></a> -<span class="sourceLineNo">219</span><a name="line.219"></a> -<span class="sourceLineNo">220</span> public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.220"></a> -<span class="sourceLineNo">221</span> int writerThreadNum, int writerQLen, String persistencePath) throws FileNotFoundException,<a name="line.221"></a> -<span class="sourceLineNo">222</span> IOException {<a name="line.222"></a> -<span class="sourceLineNo">223</span> this(ioEngineName, capacity, blockSize, bucketSizes, writerThreadNum, writerQLen,<a name="line.223"></a> -<span class="sourceLineNo">224</span> persistencePath, DEFAULT_ERROR_TOLERATION_DURATION);<a name="line.224"></a> -<span class="sourceLineNo">225</span> }<a name="line.225"></a> -<span class="sourceLineNo">226</span><a name="line.226"></a> -<span class="sourceLineNo">227</span> public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.227"></a> -<span class="sourceLineNo">228</span> int writerThreadNum, int writerQLen, String persistencePath, int ioErrorsTolerationDuration)<a name="line.228"></a> -<span class="sourceLineNo">229</span> throws FileNotFoundException, IOException {<a name="line.229"></a> -<span class="sourceLineNo">230</span> this.ioEngine = getIOEngineFromName(ioEngineName, capacity, persistencePath);<a name="line.230"></a> -<span class="sourceLineNo">231</span> this.writerThreads = new WriterThread[writerThreadNum];<a name="line.231"></a> -<span class="sourceLineNo">232</span> long blockNumCapacity = capacity / blockSize;<a name="line.232"></a> -<span class="sourceLineNo">233</span> if (blockNumCapacity >= Integer.MAX_VALUE) {<a name="line.233"></a> -<span class="sourceLineNo">234</span> // Enough for about 32TB of cache!<a name="line.234"></a> -<span class="sourceLineNo">235</span> throw new IllegalArgumentException("Cache capacity is too large, only support 32TB now");<a name="line.235"></a> -<span class="sourceLineNo">236</span> }<a name="line.236"></a> +<span class="sourceLineNo">182</span> private final BucketCacheStats cacheStats = new BucketCacheStats();<a name="line.182"></a> +<span class="sourceLineNo">183</span><a name="line.183"></a> +<span class="sourceLineNo">184</span> private final String persistencePath;<a name="line.184"></a> +<span class="sourceLineNo">185</span> private final long cacheCapacity;<a name="line.185"></a> +<span class="sourceLineNo">186</span> /** Approximate block size */<a name="line.186"></a> +<span class="sourceLineNo">187</span> private final long blockSize;<a name="line.187"></a> +<span class="sourceLineNo">188</span><a name="line.188"></a> +<span class="sourceLineNo">189</span> /** Duration of IO errors tolerated before we disable cache, 1 min as default */<a name="line.189"></a> +<span class="sourceLineNo">190</span> private final int ioErrorsTolerationDuration;<a name="line.190"></a> +<span class="sourceLineNo">191</span> // 1 min<a name="line.191"></a> +<span class="sourceLineNo">192</span> public static final int DEFAULT_ERROR_TOLERATION_DURATION = 60 * 1000;<a name="line.192"></a> +<span class="sourceLineNo">193</span><a name="line.193"></a> +<span class="sourceLineNo">194</span> // Start time of first IO error when reading or writing IO Engine, it will be<a name="line.194"></a> +<span class="sourceLineNo">195</span> // reset after a successful read/write.<a name="line.195"></a> +<span class="sourceLineNo">196</span> private volatile long ioErrorStartTime = -1;<a name="line.196"></a> +<span class="sourceLineNo">197</span><a name="line.197"></a> +<span class="sourceLineNo">198</span> /**<a name="line.198"></a> +<span class="sourceLineNo">199</span> * A ReentrantReadWriteLock to lock on a particular block identified by offset.<a name="line.199"></a> +<span class="sourceLineNo">200</span> * The purpose of this is to avoid freeing the block which is being read.<a name="line.200"></a> +<span class="sourceLineNo">201</span> * <p><a name="line.201"></a> +<span class="sourceLineNo">202</span> * Key set of offsets in BucketCache is limited so soft reference is the best choice here.<a name="line.202"></a> +<span class="sourceLineNo">203</span> */<a name="line.203"></a> +<span class="sourceLineNo">204</span> @VisibleForTesting<a name="line.204"></a> +<span class="sourceLineNo">205</span> final IdReadWriteLock offsetLock = new IdReadWriteLock(ReferenceType.SOFT);<a name="line.205"></a> +<span class="sourceLineNo">206</span><a name="line.206"></a> +<span class="sourceLineNo">207</span> private final NavigableSet<BlockCacheKey> blocksByHFile =<a name="line.207"></a> +<span class="sourceLineNo">208</span> new ConcurrentSkipListSet<>(new Comparator<BlockCacheKey>() {<a name="line.208"></a> +<span class="sourceLineNo">209</span> @Override<a name="line.209"></a> +<span class="sourceLineNo">210</span> public int compare(BlockCacheKey a, BlockCacheKey b) {<a name="line.210"></a> +<span class="sourceLineNo">211</span> int nameComparison = a.getHfileName().compareTo(b.getHfileName());<a name="line.211"></a> +<span class="sourceLineNo">212</span> if (nameComparison != 0) {<a name="line.212"></a> +<span class="sourceLineNo">213</span> return nameComparison;<a name="line.213"></a> +<span class="sourceLineNo">214</span> }<a name="line.214"></a> +<span class="sourceLineNo">215</span><a name="line.215"></a> +<span class="sourceLineNo">216</span> if (a.getOffset() == b.getOffset()) {<a name="line.216"></a> +<span class="sourceLineNo">217</span> return 0;<a name="line.217"></a> +<span class="sourceLineNo">218</span> } else if (a.getOffset() < b.getOffset()) {<a name="line.218"></a> +<span class="sourceLineNo">219</span> return -1;<a name="line.219"></a> +<span class="sourceLineNo">220</span> }<a name="line.220"></a> +<span class="sourceLineNo">221</span> return 1;<a name="line.221"></a> +<span class="sourceLineNo">222</span> }<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> /** Statistics thread schedule pool (for heavy debugging, could remove) */<a name="line.225"></a> +<span class="sourceLineNo">226</span> private final ScheduledExecutorService scheduleThreadPool = Executors.newScheduledThreadPool(1,<a name="line.226"></a> +<span class="sourceLineNo">227</span> new ThreadFactoryBuilder().setNameFormat("BucketCacheStatsExecutor").setDaemon(true).build());<a name="line.227"></a> +<span class="sourceLineNo">228</span><a name="line.228"></a> +<span class="sourceLineNo">229</span> // Allocate or free space for the block<a name="line.229"></a> +<span class="sourceLineNo">230</span> private BucketAllocator bucketAllocator;<a name="line.230"></a> +<span class="sourceLineNo">231</span><a name="line.231"></a> +<span class="sourceLineNo">232</span> /** Acceptable size of cache (no evictions if size < acceptable) */<a name="line.232"></a> +<span class="sourceLineNo">233</span> private float acceptableFactor;<a name="line.233"></a> +<span class="sourceLineNo">234</span><a name="line.234"></a> +<span class="sourceLineNo">235</span> /** Minimum threshold of cache (when evicting, evict until size < min) */<a name="line.235"></a> +<span class="sourceLineNo">236</span> private float minFactor;<a name="line.236"></a> <span class="sourceLineNo">237</span><a name="line.237"></a> -<span class="sourceLineNo">238</span> this.cacheCapacity = capacity;<a name="line.238"></a> -<span class="sourceLineNo">239</span> this.persistencePath = persistencePath;<a name="line.239"></a> -<span class="sourceLineNo">240</span> this.blockSize = blockSize;<a name="line.240"></a> -<span class="sourceLineNo">241</span> this.ioErrorsTolerationDuration = ioErrorsTolerationDuration;<a name="line.241"></a> -<span class="sourceLineNo">242</span><a name="line.242"></a> -<span class="sourceLineNo">243</span> bucketAllocator = new BucketAllocator(capacity, bucketSizes);<a name="line.243"></a> -<span class="sourceLineNo">244</span> for (int i = 0; i < writerThreads.length; ++i) {<a name="line.244"></a> -<span class="sourceLineNo">245</span> writerQueues.add(new ArrayBlockingQueue<>(writerQLen));<a name="line.245"></a> -<span class="sourceLineNo">246</span> }<a name="line.246"></a> -<span class="sourceLineNo">247</span><a name="line.247"></a> -<span class="sourceLineNo">248</span> assert writerQueues.size() == writerThreads.length;<a name="line.248"></a> -<span class="sourceLineNo">249</span> this.ramCache = new ConcurrentHashMap<>();<a name="line.249"></a> -<span class="sourceLineNo">250</span><a name="line.250"></a> -<span class="sourceLineNo">251</span> this.backingMap = new ConcurrentHashMap<>((int) blockNumCapacity);<a name="line.251"></a> -<span class="sourceLineNo">252</span><a name="line.252"></a> -<span class="sourceLineNo">253</span> if (ioEngine.isPersistent() && persistencePath != null) {<a name="line.253"></a> -<span class="sourceLineNo">254</span> try {<a name="line.254"></a> -<span class="sourceLineNo">255</span> retrieveFromFile(bucketSizes);<a name="line.255"></a> -<span class="sourceLineNo">256</span> } catch (IOException ioex) {<a name="line.256"></a> -<span class="sourceLineNo">257</span> LOG.error("Can't restore from file because of", ioex);<a name="line.257"></a> -<span class="sourceLineNo">258</span> } catch (ClassNotFoundException cnfe) {<a name="line.258"></a> -<span class="sourceLineNo">259</span> LOG.error("Can't restore from file in rebuild because can't deserialise",cnfe);<a name="line.259"></a> -<span class="sourceLineNo">260</span> throw new RuntimeException(cnfe);<a name="line.260"></a> -<span class="sourceLineNo">261</span> }<a name="line.261"></a> -<span class="sourceLineNo">262</span> }<a name="line.262"></a> -<span class="sourceLineNo">263</span> final String threadName = Thread.currentThread().getName();<a name="line.263"></a> -<span class="sourceLineNo">264</span> this.cacheEnabled = true;<a name="line.264"></a> -<span class="sourceLineNo">265</span> for (int i = 0; i < writerThreads.length; ++i) {<a name="line.265"></a> -<span class="sourceLineNo">266</span> writerThreads[i] = new WriterThread(writerQueues.get(i));<a name="line.266"></a> -<span class="sourceLineNo">267</span> writerThreads[i].setName(threadName + "-BucketCacheWriter-" + i);<a name="line.267"></a> -<span class="sourceLineNo">268</span> writerThreads[i].setDaemon(true);<a name="line.268"></a> -<span class="sourceLineNo">269</span> }<a name="line.269"></a> -<span class="sourceLineNo">270</span> startWriterThreads();<a name="line.270"></a> -<span class="sourceLineNo">271</span><a name="line.271"></a> -<span class="sourceLineNo">272</span> // Run the statistics thread periodically to print the cache statistics log<a name="line.272"></a> -<span class="sourceLineNo">273</span> // TODO: Add means of turning this off. Bit obnoxious running thread just to make a log<a name="line.273"></a> -<span class="sourceLineNo">274</span> // every five minutes.<a name="line.274"></a> -<span class="sourceLineNo">275</span> this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(this),<a name="line.275"></a> -<span class="sourceLineNo">276</span> statThreadPeriod, statThreadPeriod, TimeUnit.SECONDS);<a name="line.276"></a> -<span class="sourceLineNo">277</span> LOG.info("Started bucket cache; ioengine=" + ioEngineName +<a name="line.277"></a> -<span class="sourceLineNo">278</span> ", capacity=" + StringUtils.byteDesc(capacity) +<a name="line.278"></a> -<span class="sourceLineNo">279</span> ", blockSize=" + StringUtils.byteDesc(blockSize) + ", writerThreadNum=" +<a name="line.279"></a> -<span class="sourceLineNo">280</span> writerThreadNum + ", writerQLen=" + writerQLen + ", persistencePath=" +<a name="line.280"></a> -<span class="sourceLineNo">281</span> persistencePath + ", bucketAllocator=" + this.bucketAllocator.getClass().getName());<a name="line.281"></a> -<span class="sourceLineNo">282</span> }<a name="line.282"></a> -<span class="sourceLineNo">283</span><a name="line.283"></a> -<span class="sourceLineNo">284</span> /**<a name="line.284"></a> -<span class="sourceLineNo">285</span> * Called by the constructor to start the writer threads. Used by tests that need to override<a name="line.285"></a> -<span class="sourceLineNo">286</span> * starting the threads.<a name="line.286"></a> -<span class="sourceLineNo">287</span> */<a name="line.287"></a> -<span class="sourceLineNo">288</span> @VisibleForTesting<a name="line.288"></a> -<span class="sourceLineNo">289</span> protected void startWriterThreads() {<a name="line.289"></a> -<span class="sourceLineNo">290</span> for (WriterThread thread : writerThreads) {<a name="line.290"></a> -<span class="sourceLineNo">291</span> thread.start();<a name="line.291"></a> -<span class="sourceLineNo">292</span> }<a name="line.292"></a> -<span class="sourceLineNo">293</span> }<a name="line.293"></a> +<span class="sourceLineNo">238</span> /** Free this floating point factor of extra blocks when evicting. For example free the number of blocks requested * (1 + extraFreeFactor) */<a name="line.238"></a> +<span class="sourceLineNo">239</span> private float extraFreeFactor;<a name="line.239"></a> +<span class="sourceLineNo">240</span><a name="line.240"></a> +<span class="sourceLineNo">241</span> /** Single access bucket size */<a name="line.241"></a> +<span class="sourceLineNo">242</span> private float singleFactor;<a name="line.242"></a> +<span class="sourceLineNo">243</span><a name="line.243"></a> +<span class="sourceLineNo">244</span> /** Multiple access bucket size */<a name="line.244"></a> +<span class="sourceLineNo">245</span> private float multiFactor;<a name="line.245"></a> +<span class="sourceLineNo">246</span><a name="line.246"></a> +<span class="sourceLineNo">247</span> /** In-memory bucket size */<a name="line.247"></a> +<span class="sourceLineNo">248</span> private float memoryFactor;<a name="line.248"></a> +<span class="sourceLineNo">249</span><a name="line.249"></a> +<span class="sourceLineNo">250</span> public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.250"></a> +<span class="sourceLineNo">251</span> int writerThreadNum, int writerQLen, String persistencePath) throws FileNotFoundException,<a name="line.251"></a> +<span class="sourceLineNo">252</span> IOException {<a name="line.252"></a> +<span class="sourceLineNo">253</span> this(ioEngineName, capacity, blockSize, bucketSizes, writerThreadNum, writerQLen,<a name="line.253"></a> +<span class="sourceLineNo">254</span> persistencePath, DEFAULT_ERROR_TOLERATION_DURATION, HBaseConfiguration.create());<a name="line.254"></a> +<span class="sourceLineNo">255</span> }<a name="line.255"></a> +<span class="sourceLineNo">256</span><a name="line.256"></a> +<span class="sourceLineNo">257</span> public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.257"></a> +<span class="sourceLineNo">258</span> int writerThreadNum, int writerQLen, String persistencePath, int ioErrorsTolerationDuration,<a name="line.258"></a> +<span class="sourceLineNo">259</span> Configuration conf)<a name="line.259"></a> +<span class="sourceLineNo">260</span> throws FileNotFoundException, IOException {<a name="line.260"></a> +<span class="sourceLineNo">261</span> this.ioEngine = getIOEngineFromName(ioEngineName, capacity, persistencePath);<a name="line.261"></a> +<span class="sourceLineNo">262</span> this.writerThreads = new WriterThread[writerThreadNum];<a name="line.262"></a> +<span class="sourceLineNo">263</span> long blockNumCapacity = capacity / blockSize;<a name="line.263"></a> +<span class="sourceLineNo">264</span> if (blockNumCapacity >= Integer.MAX_VALUE) {<a name="line.264"></a> +<span class="sourceLineNo">265</span> // Enough for about 32TB of cache!<a name="line.265"></a> +<span class="sourceLineNo">266</span> throw new IllegalArgumentException("Cache capacity is too large, only support 32TB now");<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> this.acceptableFactor = conf.getFloat(ACCEPT_FACTOR_CONFIG_NAME, DEFAULT_ACCEPT_FACTOR);<a name="line.269"></a> +<span class="sourceLineNo">270</span> this.minFactor = conf.getFloat(MIN_FACTOR_CONFIG_NAME, DEFAULT_MIN_FACTOR);<a name="line.270"></a> +<span class="sourceLineNo">271</span> this.extraFreeFactor = conf.getFloat(EXTRA_FREE_FACTOR_CONFIG_NAME, DEFAULT_EXTRA_FREE_FACTOR);<a name="line.271"></a> +<span class="sourceLineNo">272</span> this.singleFactor = conf.getFloat(SINGLE_FACTOR_CONFIG_NAME, DEFAULT_SINGLE_FACTOR);<a name="line.272"></a> +<span class="sourceLineNo">273</span> this.multiFactor = conf.getFloat(MULTI_FACTOR_CONFIG_NAME, DEFAULT_MULTI_FACTOR);<a name="line.273"></a> +<span class="sourceLineNo">274</span> this.memoryFactor = conf.getFloat(MEMORY_FACTOR_CONFIG_NAME, DEFAULT_MEMORY_FACTOR);<a name="line.274"></a> +<span class="sourceLineNo">275</span><a name="line.275"></a> +<span class="sourceLineNo">276</span> sanityCheckConfigs();<a name="line.276"></a> +<span class="sourceLineNo">277</span><a name="line.277"></a> +<span class="sourceLineNo">278</span> LOG.info("Instantiating BucketCache with acceptableFactor: " + acceptableFactor + ", minFactor: " + minFactor +<a name="line.278"></a> +<span class="sourceLineNo">279</span> ", extraFreeFactor: " + extraFreeFactor + ", singleFactor: " + singleFactor + ", multiFactor: " + multiFactor +<a name="line.279"></a> +<span class="sourceLineNo">280</span> ", memoryFactor: " + memoryFactor);<a name="line.280"></a> +<span class="sourceLineNo">281</span><a name="line.281"></a> +<span class="sourceLineNo">282</span> this.cacheCapacity = capacity;<a name="line.282"></a> +<span class="sourceLineNo">283</span> this.persistencePath = persistencePath;<a name="line.283"></a> +<span class="sourceLineNo">284</span> this.blockSize = blockSize;<a name="line.284"></a> +<span class="sourceLineNo">285</span> this.ioErrorsTolerationDuration = ioErrorsTolerationDuration;<a name="line.285"></a> +<span class="sourceLineNo">286</span><a name="line.286"></a> +<span class="sourceLineNo">287</span> bucketAllocator = new BucketAllocator(capacity, bucketSizes);<a name="line.287"></a> +<span class="sourceLineNo">288</span> for (int i = 0; i < writerThreads.length; ++i) {<a name="line.288"></a> +<span class="sourceLineNo">289</span> writerQueues.add(new ArrayBlockingQueue<>(writerQLen));<a name="line.289"></a> +<span class="sourceLineNo">290</span> }<a name="line.290"></a> +<span class="sourceLineNo">291</span><a name="line.291"></a> +<span class="sourceLineNo">292</span> assert writerQueues.size() == writerThreads.length;<a name="line.292"></a> +<span class="sourceLineNo">293</span> this.ramCache = new ConcurrentHashMap<>();<a name="line.293"></a> <span class="sourceLineNo">294</span><a name="line.294"></a> -<span class="sourceLineNo">295</span> @VisibleForTesting<a name="line.295"></a> -<span class="sourceLineNo">296</span> boolean isCacheEnabled() {<a name="line.296"></a> -<span class="sourceLineNo">297</span> return this.cacheEnabled;<a name="line.297"></a> -<span class="sourceLineNo">298</span> }<a name="line.298"></a> -<span class="sourceLineNo">299</span><a name="line.299"></a> -<span class="sourceLineNo">300</span> public long getMaxSize() {<a name="line.300"></a> -<span class="sourceLineNo">301</span> return this.cacheCapacity;<a name="line.301"></a> -<span class="sourceLineNo">302</span> }<a name="line.302"></a> -<span class="sourceLineNo">303</span><a name="line.303"></a> -<span class="sourceLineNo">304</span> public String getIoEngine() {<a name="line.304"></a> -<span class="sourceLineNo">305</span> return ioEngine.toString();<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> /**<a name="line.308"></a> -<span class="sourceLineNo">309</span> * Get the IOEngine from the IO engine name<a name="line.309"></a> -<span class="sourceLineNo">310</span> * @param ioEngineName<a name="line.310"></a> -<span class="sourceLineNo">311</span> * @param capacity<a name="line.311"></a> -<span class="sourceLineNo">312</span> * @param persistencePath<a name="line.312"></a> -<span class="sourceLineNo">313</span> * @return the IOEngine<a name="line.313"></a> -<span class="sourceLineNo">314</span> * @throws IOException<a name="line.314"></a> -<span class="sourceLineNo">315</span> */<a name="line.315"></a> -<span class="sourceLineNo">316</span> private IOEngine getIOEngineFromName(String ioEngineName, long capacity, String persistencePath)<a name="line.316"></a> -<span class="sourceLineNo">317</span> throws IOException {<a name="line.317"></a> -<span class="sourceLineNo">318</span> if (ioEngineName.startsWith("file:") || ioEngineName.startsWith("files:")) {<a name="line.318"></a> -<span class="sourceLineNo">319</span> // In order to make the usage simple, we only need the prefix 'files:' in<a name="line.319"></a> -<span class="sourceLineNo">320</span> // document whether one or multiple file(s), but also support 'file:' for<a name="line.320"></a> -<span class="sourceLineNo">321</span> // the compatibility<a name="line.321"></a> -<span class="sourceLineNo">322</span> String[] filePaths = ioEngineName.substring(ioEngineName.indexOf(":") + 1)<a name="line.322"></a> -<span class="sourceLineNo">323</span> .split(FileIOEngine.FILE_DELIMITER);<a name="line.323"></a> -<span class="sourceLineNo">324</span> return new FileIOEngine(capacity, persistencePath != null, filePaths);<a name="line.324"></a> -<span class="sourceLineNo">325</span> } else if (ioEngineName.startsWith("offheap")) {<a name="line.325"></a> -<span class="sourceLineNo">326</span> return new ByteBufferIOEngine(capacity, true);<a name="line.326"></a> -<span class="sourceLineNo">327</span> } else if (ioEngineName.startsWith("heap")) {<a name="line.327"></a> -<span class="sourceLineNo">328</span> return new ByteBufferIOEngine(capacity, false);<a name="line.328"></a> -<span class="sourceLineNo">329</span> } else if (ioEngineName.startsWith("mmap:")) {<a name="line.329"></a> -<span class="sourceLineNo">330</span> return new FileMmapEngine(ioEngineName.substring(5), capacity);<a name="line.330"></a> -<span class="sourceLineNo">331</span> } else {<a name="line.331"></a> -<span class="sourceLineNo">332</span> throw new IllegalArgumentException(<a name="line.332"></a> -<span class="sourceLineNo">333</span> "Don't understand io engine name for cache - prefix with file:, heap or offheap");<a name="line.333"></a> -<span class="sourceLineNo">334</span> }<a name="line.334"></a> -<span class="sourceLineNo">335</span> }<a name="line.335"></a> -<span class="sourceLineNo">336</span><a name="line.336"></a> -<span class="sourceLineNo">337</span> /**<a name="line.337"></a> -<span class="sourceLineNo">338</span> * Cache the block with the specified name and buffer.<a name="line.338"></a> -<span class="sourceLineNo">339</span> * @param cacheKey block's cache key<a name="line.339"></a> -<span class="sourceLineNo">340</span> * @param buf block buffer<a name="line.340"></a> -<span class="sourceLineNo">341</span> */<a name="line.341"></a> -<span class="sourceLineNo">342</span> @Override<a name="line.342"></a> -<span class="sourceLineNo">343</span> public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {<a name="line.343"></a> -<span class="sourceLineNo">344</span> cacheBlock(cacheKey, buf, false, false);<a name="line.344"></a> -<span class="sourceLineNo">345</span> }<a name="line.345"></a> -<span class="sourceLineNo">346</span><a name="line.346"></a> -<span class="sourceLineNo">347</span> /**<a name="line.347"></a> -<span class="sourceLineNo">348</span> * Cache the block with the specified name and buffer.<a name="line.348"></a> -<span class="sourceLineNo">349</span> * @param cacheKey block's cache key<a name="line.349"></a> -<span class="sourceLineNo">350</span> * @param cachedItem block buffer<a name="line.350"></a> -<span class="sourceLineNo">351</span> * @param inMemory if block is in-memory<a name="line.351"></a> -<span class="sourceLineNo">352</span> * @param cacheDataInL1<a name="line.352"></a> -<span class="sourceLineNo">353</span> */<a name="line.353"></a> -<span class="sourceLineNo">354</span> @Override<a name="line.354"></a> -<span class="sourceLineNo">355</span> public void cacheBlock(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.355"></a> -<span class="sourceLineNo">356</span> final boolean cacheDataInL1) {<a name="line.356"></a> -<span class="sourceLineNo">357</span> cacheBlockWithWait(cacheKey, cachedItem, inMemory, wait_when_cache);<a name="line.357"></a> +<span class="sourceLineNo">295</span> this.backingMap = new ConcurrentHashMap<>((int) blockNumCapacity);<a name="line.295"></a> +<span class="sourceLineNo">296</span><a name="line.296"></a> +<span class="sourceLineNo">297</span> if (ioEngine.isPersistent() && persistencePath != null) {<a name="line.297"></a> +<span class="sourceLineNo">298</span> try {<a name="line.298"></a> +<span class="sourceLineNo">299</span> retrieveFromFile(bucketSizes);<a name="line.299"></a> +<span class="sourceLineNo">300</span> } catch (IOException ioex) {<a name="line.300"></a> +<span class="sourceLineNo">301</span> LOG.error("Can't restore from file because of", ioex);<a name="line.301"></a> +<span class="sourceLineNo">302</span> } catch (ClassNotFoundException cnfe) {<a name="line.302"></a> +<span class="sourceLineNo">303</span> LOG.error("Can't restore from file in rebuild because can't deserialise",cnfe);<a name="line.303"></a> +<span class="sourceLineNo">304</span> throw new RuntimeException(cnfe);<a name="line.304"></a> +<span class="sourceLineNo">305</span> }<a name="line.305"></a> +<span class="sourceLineNo">306</span> }<a name="line.306"></a> +<span class="sourceLineNo">307</span> final String threadName = Thread.currentThread().getName();<a name="line.307"></a> +<span class="sourceLineNo">308</span> this.cacheEnabled = true;<a name="line.308"></a> +<span class="sourceLineNo">309</span> for (int i = 0; i < writerThreads.length; ++i) {<a name="line.309"></a> +<span class="sourceLineNo">310</span> writerThreads[i] = new WriterThread(writerQueues.get(i));<a name="line.310"></a> +<span class="sourceLineNo">311</span> writerThreads[i].setName(threadName + "-BucketCacheWriter-" + i);<a name="line.311"></a> +<span class="sourceLineNo">312</span> writerThreads[i].setDaemon(true);<a name="line.312"></a> +<span class="sourceLineNo">313</span> }<a name="line.313"></a> +<span class="sourceLineNo">314</span> startWriterThreads();<a name="line.314"></a> +<span class="sourceLineNo">315</span><a name="line.315"></a> +<span class="sourceLineNo">316</span> // Run the statistics thread periodically to print the cache statistics log<a name="line.316"></a> +<span class="sourceLineNo">317</span> // TODO: Add means of turning this off. Bit obnoxious running thread just to make a log<a name="line.317"></a> +<span class="sourceLineNo">318</span> // every five minutes.<a name="line.318"></a> +<span class="sourceLineNo">319</span> this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(this),<a name="line.319"></a> +<span class="sourceLineNo">320</span> statThreadPeriod, statThreadPeriod, TimeUnit.SECONDS);<a name="line.320"></a> +<span class="sourceLineNo">321</span> LOG.info("Started bucket cache; ioengine=" + ioEngineName +<a name="line.321"></a> +<span class="sourceLineNo">322</span> ", capacity=" + StringUtils.byteDesc(capacity) +<a name="line.322"></a> +<span class="sourceLineNo">323</span> ", blockSize=" + StringUtils.byteDesc(blockSize) + ", writerThreadNum=" +<a name="line.323"></a> +<span class="sourceLineNo">324</span> writerThreadNum + ", writerQLen=" + writerQLen + ", persistencePath=" +<a name="line.324"></a> +<span class="sourceLineNo">325</span> persistencePath + ", bucketAllocator=" + this.bucketAllocator.getClass().getName());<a name="line.325"></a> +<span class="sourceLineNo">326</span> }<a name="line.326"></a> +<span class="sourceLineNo">327</span><a name="line.327"></a> +<span class="sourceLineNo">328</span> private void sanityCheckConfigs() {<a name="line.328"></a> +<span class="sourceLineNo">329</span> Preconditions.checkArgument(acceptableFactor <= 1 && acceptableFactor >= 0, ACCEPT_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.329"></a> +<span class="sourceLineNo">330</span> Preconditions.checkArgument(minFactor <= 1 && minFactor >= 0, MIN_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.330"></a> +<span class="sourceLineNo">331</span> Preconditions.checkArgument(minFactor <= acceptableFactor, MIN_FACTOR_CONFIG_NAME + " must be <= " + ACCEPT_FACTOR_CONFIG_NAME);<a name="line.331"></a> +<span class="sourceLineNo">332</span> Preconditions.checkArgument(extraFreeFactor >= 0, EXTRA_FREE_FACTOR_CONFIG_NAME + " must be greater than 0.0");<a name="line.332"></a> +<span class="sourceLineNo">333</span> Preconditions.checkArgument(singleFactor <= 1 && singleFactor >= 0, SINGLE_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.333"></a> +<span class="sourceLineNo">334</span> Preconditions.checkArgument(multiFactor <= 1 && multiFactor >= 0, MULTI_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.334"></a> +<span class="sourceLineNo">335</span> Preconditions.checkArgument(memoryFactor <= 1 && memoryFactor >= 0, MEMORY_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.335"></a> +<span class="sourceLineNo">336</span> Preconditions.checkArgument((singleFactor + multiFactor + memoryFactor) == 1, SINGLE_FACTOR_CONFIG_NAME + ", " +<a name="line.336"></a> +<span class="sourceLineNo">337</span> MULTI_FACTOR_CONFIG_NAME + ", and " + MEMORY_FACTOR_CONFIG_NAME + " segments must add up to 1.0");<a name="line.337"></a> +<span class="sourceLineNo">338</span> }<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> * Called by the constructor to start the writer threads. Used by tests that need to override<a name="line.341"></a> +<span class="sourceLineNo">342</span> * starting the threads.<a name="line.342"></a> +<span class="sourceLineNo">343</span> */<a name="line.343"></a> +<span class="sourceLineNo">344</span> @VisibleForTesting<a name="line.344"></a> +<span class="sourceLineNo">345</span> protected void startWriterThreads() {<a name="line.345"></a> +<span class="sourceLineNo">346</span> for (WriterThread thread : writerThreads) {<a name="line.346"></a> +<span class="sourceLineNo">347</span> thread.start();<a name="line.347"></a> +<span class="sourceLineNo">348</span> }<a name="line.348"></a> +<span class="sourceLineNo">349</span> }<a name="line.349"></a> +<span class="sourceLineNo">350</span><a name="line.350"></a> +<span class="sourceLineNo">351</span> @VisibleForTesting<a name="line.351"></a> +<span class="sourceLineNo">352</span> boolean isCacheEnabled() {<a name="line.352"></a> +<span class="sourceLineNo">353</span> return this.cacheEnabled;<a name="line.353"></a> +<span class="sourceLineNo">354</span> }<a name="line.354"></a> +<span class="sourceLineNo">355</span><a name="line.355"></a> +<span class="sourceLineNo">356</span> public long getMaxSize() {<a name="line.356"></a> +<span class="sourceLineNo">357</span> return this.cacheCapacity;<a name="line.357"></a> <span class="sourceLineNo">358</span> }<a name="line.358"></a> <span class="sourceLineNo">359</span><a name="line.359"></a> -<span class="sourceLineNo">360</span> /**<a name="line.360"></a> -<span class="sourceLineNo">361</span> * Cache the block to ramCache<a name="line.361"></a> -<span class="sourceLineNo">362</span> * @param cacheKey block's cache key<a name="line.362"></a> -<span class="sourceLineNo">363</span> * @param cachedItem block buffer<a name="line.363"></a> -<span class="sourceLineNo">364</span> * @param inMemory if block is in-memory<a name="line.364"></a> -<span class="sourceLineNo">365</span> * @param wait if true, blocking wait 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class="sourceLineNo">387</span> BlockingQueue<RAMQueueEntry> bq = writerQueues.get(queueNum);<a name="line.387"></a> -<span class="sourceLineNo">388</span> boolean successfulAddition = false;<a name="line.388"></a> -<span class="sourceLineNo">389</span> if (wait) {<a name="line.389"></a> -<span class="sourceLineNo">390</span> try {<a name="line.390"></a> -<span class="sourceLineNo">391</span> successfulAddition = bq.offer(re, DEFAULT_CACHE_WAIT_TIME, TimeUnit.MILLISECONDS);<a name="line.391"></a> -<span class="sourceLineNo">392</span> } catch (InterruptedException e) {<a name="line.392"></a> -<span class="sourceLineNo">393</span> Thread.currentThread().interrupt();<a name="line.393"></a> -<span class="sourceLineNo">394</span> }<a name="line.394"></a> -<span class="sourceLineNo">395</span> } else {<a name="line.395"></a> -<span class="sourceLineNo">396</span> successfulAddition = bq.offer(re);<a name="line.396"></a> -<span class="sourceLineNo">397</span> }<a name="line.397"></a> -<span 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-<span class="sourceLineNo">410</span> * @param key block's cache key<a name="line.410"></a> -<span class="sourceLineNo">411</span> * @param caching true if the caller caches blocks on cache misses<a name="line.411"></a> -<span class="sourceLineNo">412</span> * @param repeat Whether this is a repeat lookup for the same block<a name="line.412"></a> -<span class="sourceLineNo">413</span> * @param updateCacheMetrics Whether we should update cache metrics or not<a name="line.413"></a> -<span class="sourceLineNo">414</span> * @return buffer of specified cache key, or null if not in cache<a name="line.414"></a> -<span class="sourceLineNo">415</span> */<a name="line.415"></a> -<span class="sourceLineNo">416</span> @Override<a name="line.416"></a> -<span class="sourceLineNo">417</span> public Cacheable getBlock(BlockCacheKey key, boolean caching, boolean repeat,<a name="line.417"></a> -<span class="sourceLineNo">418</span> boolean updateCacheMetrics) {<a name="line.418"></a> -<span class="sourceLineNo">419</span> if (!cacheEnabled) {<a name="line.419"></a> -<span class="sourceLineNo">420</span> return null;<a name="line.420"></a> -<span class="sourceLineNo">421</span> }<a name="line.421"></a> -<span class="sourceLineNo">422</span> RAMQueueEntry re = ramCache.get(key);<a name="line.422"></a> -<span class="sourceLineNo">423</span> if (re != null) {<a name="line.423"></a> -<span class="sourceLineNo">424</span> if (updateCacheMetrics) {<a name="line.424"></a> -<span class="sourceLineNo">425</span> cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.425"></a> -<span class="sourceLineNo">426</span> }<a name="line.426"></a> -<span class="sourceLineNo">427</span> re.access(accessCount.incrementAndGet());<a name="line.427"></a> -<span class="sourceLineNo">428</span> return re.getData();<a name="line.428"></a> -<span class="sourceLineNo">429</span> }<a name="line.429"></a> -<span class="sourceLineNo">430</span> BucketEntry bucketEntry = backingMap.get(key);<a name="line.430"></a> -<span class="sourceLineNo">431</span> if (bucketEntry != null) {<a name="line.431"></a> -<span class="sourceLineNo">432</span> long start = System.nanoTime();<a name="line.432"></a> -<span class="sourceLineNo">433</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.433"></a> -<span class="sourceLineNo">434</span> try {<a name="line.434"></a> -<span class="sourceLineNo">435</span> lock.readLock().lock();<a name="line.435"></a> -<span class="sourceLineNo">436</span> // We can not read here even if backingMap does contain the given key because its offset<a name="line.436"></a> -<span class="sourceLineNo">437</span> // maybe changed. 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name="line.512"></a> -<span class="sourceLineNo">513</span> }<a name="line.513"></a> -<span class="sourceLineNo">514</span> } finally {<a name="line.514"></a> -<span class="sourceLineNo">515</span> lock.writeLock().unlock();<a name="line.515"></a> -<span class="sourceLineNo">516</span> }<a name="line.516"></a> -<span class="sourceLineNo">517</span> cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.517"></a> -<span class="sourceLineNo">518</span> return true;<a name="line.518"></a> -<span class="sourceLineNo">519</span> }<a name="line.519"></a> -<span class="sourceLineNo">520</span><a name="line.520"></a> -<span class="sourceLineNo">521</span> private RAMQueueEntry checkRamCache(BlockCacheKey cacheKey) {<a name="line.521"></a> -<span class="sourceLineNo">522</span> RAMQueueEntry removedBlock = ramCache.remove(cacheKey);<a name="line.522"></a> -<span class="sourceLineNo">523</span> if (removedBlock != null) {<a name="line.523"></a> -<span class="sourceLineNo">524</span> this.blockNumber.decrementAndGet();<a name="line.524"></a> -<span class="sourceLineNo">525</span> this.heapSize.addAndGet(-1 * removedBlock.getData().heapSize());<a name="line.525"></a> -<span class="sourceLineNo">526</span> }<a name="line.526"></a> -<span class="sourceLineNo">527</span> return removedBlock;<a name="line.527"></a> -<span class="sourceLineNo">528</span> }<a name="line.528"></a> -<span class="sourceLineNo">529</span><a name="line.529"></a> -<span class="sourceLineNo">530</span> public boolean evictBlock(BlockCacheKey cacheKey, boolean deletedBlock) {<a name="line.530"></a> -<span class="sourceLineNo">531</span> if (!cacheEnabled) {<a name="line.531"></a> -<span class="sourceLineNo">532</span> return false;<a name="line.532"></a> -<span class="sourceLineNo">533</span> }<a name="line.533"></a> -<span class="sourceLineNo">534</span> RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.534"></a> -<span class="sourceLineNo">535</span> BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.535"></a> -<span class="sourceLineNo">536</span> if (bucketEntry == null) {<a name="line.536"></a> -<span class="sourceLineNo">537</span> if (removedBlock != null) {<a name="line.537"></a> -<span class="sourceLineNo">538</span> cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.538"></a> -<span class="sourceLineNo">539</span> return true;<a name="line.539"></a> -<span class="sourceLineNo">540</span> } else {<a name="line.540"></a> -<span class="sourceLineNo">541</span> return false;<a name="line.541"></a> -<span class="sourceLineNo">542</span> }<a name="line.542"></a> -<span class="sourceLineNo">543</span> }<a name="line.543"></a> -<span class="sourceLineNo">544</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.544"></a> -<span class="sourceLineNo">545</span> try {<a name="line.545"></a> -<span class="sourceLineNo">546</span> lock.writeLock().lock();<a name="line.546"></a> -<span class="sourceLineNo">547</span> int refCount = bucketEntry.refCount.get();<a name="line.547"></a> -<span class="sourceLineNo">548</span> if(refCount == 0) {<a name="line.548"></a> -<span class="sourceLineNo">549</span> if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.549"></a> -<span class="sourceLineNo">550</span> blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.550"></a> -<span class="sourceLineNo">551</span> } else {<a name="line.551"></a> -<span class="sourceLineNo">552</span> return false;<a name="line.552"></a> -<span class="sourceLineNo">553</span> }<a name="line.553"></a> -<span class="sourceLineNo">554</span> } else {<a name="line.554"></a> -<span class="sourceLineNo">555</span> if(!deletedBlock) {<a name="line.555"></a> -<span class="sourceLineNo">556</span> if (LOG.isDebugEnabled()) {<a name="line.556"></a> -<span class="sourceLineNo">557</span> LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.557"></a> -<span class="sourceLineNo">558</span> + " readers. Can not be freed now");<a name="line.558"></a> -<span class="sourceLineNo">559</span> }<a name="line.559"></a> -<span class="sourceLineNo">560</span> return false;<a name="line.560"></a> -<span class="sourceLineNo">561</span> } else {<a name="line.561"></a> -<span class="sourceLineNo">562</span> if (LOG.isDebugEnabled()) {<a name="line.562"></a> -<span class="sourceLineNo">563</span> LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.563"></a> -<span class="sourceLineNo">564</span> + " readers. Can not be freed now. Hence will mark this"<a name="line.564"></a> -<span class="sourceLineNo">565</span> + " for evicting at a later point");<a name="line.565"></a> -<span class="sourceLineNo">566</span> }<a name="line.566"></a> -<span class="sourceLineNo">567</span> bucketEntry.markedForEvict = true;<a name="line.567"></a> -<span class="sourceLineNo">568</span> }<a name="line.568"></a> +<span class="sourceLineNo">360</span> public String getIoEngine() {<a name="line.360"></a> +<span class="sourceLineNo">361</span> return ioEngine.toString();<a name="line.361"></a> +<span class="sourceLineNo">362</span> }<a name="line.362"></a> +<span class="sourceLineNo">363</span><a name="line.363"></a> +<span class="sourceLineNo">364</span> /**<a name="line.364"></a> +<span class="sourceLineNo">365</span> * Get the IOEngine from the IO engine name<a name="line.365"></a> +<span class="sourceLineNo">366</span> * @param ioEngineName<a name="line.366"></a> +<span class="sourceLineNo">367</span> * @param capacity<a name="line.367"></a> +<span class="sourceLineNo">368</span> * @param persistencePath<a name="line.368"></a> +<span class="sourceLineNo">369</span> * @return the IOEngine<a name="line.369"></a> +<span class="sourceLineNo">370</span> * @throws IOException<a name="line.370"></a> +<span class="sourceLineNo">371</span> */<a name="line.371"></a> +<span class="sourceLineNo">372</span> private IOEngine getIOEngineFromName(String ioEngineName, long capacity, String persistencePath)<a name="line.372"></a> +<span class="sourceLineNo">373</span> throws IOException {<a name="line.373"></a> +<span class="sourceLineNo">374</span> if (ioEngineName.startsWith("file:") || ioEngineName.startsWith("files:")) {<a name="line.374"></a> +<span class="sourceLineNo">375</span> // In order to make the usage simple, we only need the prefix 'files:' in<a name="line.375"></a> +<span class="sourceLineNo">376</span> // document whether one or multiple file(s), but also support 'file:' for<a name="line.376"></a> +<span class="sourceLineNo">377</span> // the compatibility<a name="line.377"></a> +<span class="sourceLineNo">378</span> String[] filePaths = ioEngineName.substring(ioEngineName.indexOf(":") + 1)<a name="line.378"></a> +<span class="sourceLineNo">379</span> .split(FileIOEngine.FILE_DELIMITER);<a name="line.379"></a> +<span class="sourceLineNo">380</span> return new FileIOEngine(capacity, persistencePath != null, filePaths);<a name="line.380"></a> +<span class="sourceLineNo">381</span> } else if (ioEngineName.startsWith("offheap")) {<a name="line.381"></a> +<span class="sourceLineNo">382</span> return new ByteBufferIOEngine(capacity, true);<a name="line.382"></a> +<span class="sourceLineNo">383</span> } else if (ioEngineName.startsWith("heap")) {<a name="line.383"></a> +<span class="sourceLineNo">384</span> return new ByteBufferIOEngine(capacity, false);<a name="line.384"></a> +<span class="sourceLineNo">385</span> } else if (ioEngineName.startsWith("mmap:")) {<a name="line.385"></a> +<span class="sourceLineNo">386</span> return new FileMmapEngine(ioEngineName.substring(5), capacity);<a name="line.386"></a> +<span class="sourceLineNo">387</span> } else {<a name="line.387"></a> +<span class="sourceLineNo">388</span> throw new IllegalArgumentException(<a name="line.388"></a> +<span class="sourceLineNo">389</span> "Don't understand io engine name for cache - prefix with file:, heap or offheap");<a name="line.389"></a> +<span class="sourceLineNo">390</span> }<a name="line.390"></a> +<span class="sourceLineNo">391</span> }<a name="line.391"></a> +<span class="sourceLineNo">392</span><a name="line.392"></a> +<span class="sourceLineNo">393</span> /**<a name="line.393"></a> +<span class="sourceLineNo">394</span> * Cache the block with the specified name and buffer.<a name="line.394"></a> +<span class="sourceLineNo">395</span> * @param cacheKey block's cache key<a name="line.395"></a> +<span class="sourceLineNo">396</span> * @param buf block buffer<a name="line.396"></a> +<span class="sourceLineNo">397</span> */<a name="line.397"></a> +<span class="sourceLineNo">398</span> @Override<a name="line.398"></a> +<span class="sourceLineNo">399</span> public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {<a name="line.399"></a> +<span class="sourceLineNo">400</span> cacheBlock(cacheKey, buf, false, false);<a name="line.400"></a> +<span class="sourceLineNo">401</span> }<a name="line.401"></a> +<span class="sourceLineNo">402</span><a name="line.402"></a> +<span class="sourceLineNo">403</span> /**<a name="line.403"></a> +<span class="sourceLineNo">404</span> * Cache the block with the specified name and buffer.<a name="line.404"></a> +<span class="sourceLineNo">405</span> * @param cacheKey block's cache key<a name="line.405"></a> +<span class="sourceLineNo">406</span> * @param cachedItem block buffer<a name="line.406"></a> +<span class="sourceLineNo">407</span> * @param inMemory if block is in-memory<a name="line.407"></a> +<span class="sourceLineNo">408</span> * @param cacheDataInL1<a name="line.408"></a> +<span class="sourceLineNo">409</span> */<a name="line.409"></a> +<span class="sourceLineNo">410</span> @Override<a name="line.410"></a> +<span class="sourceLineNo">411</span> public void cacheBlock(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.411"></a> +<span class="sourceLineNo">412</span> final boolean cacheDataInL1) {<a name="line.412"></a> +<span
<TRUNCATED>
