http://git-wip-us.apache.org/repos/asf/hbase-site/blob/58f51408/testdevapidocs/src-html/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html
----------------------------------------------------------------------
diff --git
a/testdevapidocs/src-html/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html
b/testdevapidocs/src-html/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html
index ad16b5c..8296871 100644
---
a/testdevapidocs/src-html/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html
+++
b/testdevapidocs/src-html/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html
@@ -50,7 +50,7 @@
<span class="sourceLineNo">042</span>import
org.apache.hadoop.hbase.io.hfile.bucket.BucketAllocator;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import
org.apache.hadoop.hbase.io.hfile.bucket.BucketCache;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import
org.apache.hadoop.hbase.testclassification.IOTests;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import
org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.45"></a>
+<span class="sourceLineNo">045</span>import
org.apache.hadoop.hbase.testclassification.LargeTests;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import org.junit.Before;<a
name="line.46"></a>
<span class="sourceLineNo">047</span>import org.junit.Rule;<a
name="line.47"></a>
<span class="sourceLineNo">048</span>import org.junit.Test;<a
name="line.48"></a>
@@ -61,182 +61,188 @@
<span class="sourceLineNo">053</span>/**<a name="line.53"></a>
<span class="sourceLineNo">054</span> * Test for file-backed BucketCache.<a
name="line.54"></a>
<span class="sourceLineNo">055</span> */<a name="line.55"></a>
-<span class="sourceLineNo">056</span>@Category({IOTests.class,
SmallTests.class})<a name="line.56"></a>
-<span class="sourceLineNo">057</span>public class TestHFileBackedByBucketCache
{<a name="line.57"></a>
-<span class="sourceLineNo">058</span> private static final Log LOG =
LogFactory.getLog(TestHFileBackedByBucketCache.class);<a name="line.58"></a>
-<span class="sourceLineNo">059</span> @Rule public TestName name = new
TestName();<a name="line.59"></a>
-<span class="sourceLineNo">060</span> @Rule public final TestRule timeout =
CategoryBasedTimeout.builder().withTimeout(this.getClass()).<a
name="line.60"></a>
-<span class="sourceLineNo">061</span>
withLookingForStuckThread(true).build();<a name="line.61"></a>
-<span class="sourceLineNo">062</span> private static final
HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();<a name="line.62"></a>
-<span class="sourceLineNo">063</span> private static final int ROW_LENGTH =
4;<a name="line.63"></a>
-<span class="sourceLineNo">064</span> private Configuration conf;<a
name="line.64"></a>
-<span class="sourceLineNo">065</span> private FileSystem fs;<a
name="line.65"></a>
-<span class="sourceLineNo">066</span><a name="line.66"></a>
-<span class="sourceLineNo">067</span> // MATH! SIZING FOR THE TEST!<a
name="line.67"></a>
-<span class="sourceLineNo">068</span> // Set bucketcache to be smallest size
possible which is 1MB. We do that in the test<a name="line.68"></a>
-<span class="sourceLineNo">069</span> // @Before
<code>before</code> method. Into out 1MB cache, have it so only one
bucket. If<a name="line.69"></a>
-<span class="sourceLineNo">070</span> // bucketsize is set to 125kb in size,
we will have one bucket in our 1MB bucketcache. It is<a name="line.70"></a>
-<span class="sourceLineNo">071</span> // cryptic how this comes about but
basically comes down to<a name="line.71"></a>
-<span class="sourceLineNo">072</span> // {@link
BucketAllocator#FEWEST_ITEMS_IN_BUCKET} being '4'... so 4 * 125 = just over
500k or so<a name="line.72"></a>
-<span class="sourceLineNo">073</span> // which makes for one bucket only in
1M which you can see from TRACE logging:<a name="line.73"></a>
-<span class="sourceLineNo">074</span> //<a name="line.74"></a>
-<span class="sourceLineNo">075</span> // Cache totalSize=532480, buckets=1,
bucket capacity=<a name="line.75"></a>
-<span class="sourceLineNo">076</span> //
532480=(4*133120)=(FEWEST_ITEMS_IN_BUCKET*(largest configured bucketcache
size))<a name="line.76"></a>
+<span class="sourceLineNo">056</span>// This is marked a LargeTest so it runs
in its own JVM. We do this because we are making use of<a name="line.56"></a>
+<span class="sourceLineNo">057</span>// the cache and the cache is global. We
don't want any other concurrent test polluting ours which<a name="line.57"></a>
+<span class="sourceLineNo">058</span>// can happen if more than one test in a
single JVM which can happen when tests are small.<a name="line.58"></a>
+<span class="sourceLineNo">059</span>@Category({IOTests.class,
LargeTests.class})<a name="line.59"></a>
+<span class="sourceLineNo">060</span>public class TestHFileBackedByBucketCache
{<a name="line.60"></a>
+<span class="sourceLineNo">061</span> private static final Log LOG =
LogFactory.getLog(TestHFileBackedByBucketCache.class);<a name="line.61"></a>
+<span class="sourceLineNo">062</span> @Rule public TestName name = new
TestName();<a name="line.62"></a>
+<span class="sourceLineNo">063</span> @Rule public final TestRule timeout =
CategoryBasedTimeout.builder().withTimeout(this.getClass()).<a
name="line.63"></a>
+<span class="sourceLineNo">064</span>
withLookingForStuckThread(true).build();<a name="line.64"></a>
+<span class="sourceLineNo">065</span> private static final
HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();<a name="line.65"></a>
+<span class="sourceLineNo">066</span> private static final int ROW_LENGTH =
4;<a name="line.66"></a>
+<span class="sourceLineNo">067</span> private Configuration conf;<a
name="line.67"></a>
+<span class="sourceLineNo">068</span> private FileSystem fs;<a
name="line.68"></a>
+<span class="sourceLineNo">069</span><a name="line.69"></a>
+<span class="sourceLineNo">070</span> // MATH! SIZING FOR THE TEST!<a
name="line.70"></a>
+<span class="sourceLineNo">071</span> // Set bucketcache to be smallest size
possible which is 1MB. We do that in the test<a name="line.71"></a>
+<span class="sourceLineNo">072</span> // @Before
<code>before</code> method. Into out 1MB cache, have it so only one
bucket. If<a name="line.72"></a>
+<span class="sourceLineNo">073</span> // bucketsize is set to 125kb in size,
we will have one bucket in our 1MB bucketcache. It is<a name="line.73"></a>
+<span class="sourceLineNo">074</span> // cryptic how this comes about but
basically comes down to<a name="line.74"></a>
+<span class="sourceLineNo">075</span> // {@link
BucketAllocator#FEWEST_ITEMS_IN_BUCKET} being '4'... so 4 * 125 = just over
500k or so<a name="line.75"></a>
+<span class="sourceLineNo">076</span> // which makes for one bucket only in
1M which you can see from TRACE logging:<a name="line.76"></a>
<span class="sourceLineNo">077</span> //<a name="line.77"></a>
-<span class="sourceLineNo">078</span> // Now into this one big bucket, we
write hfileblocks....Each hfileblock has two keys because<a name="line.78"></a>
-<span class="sourceLineNo">079</span> // first is under the BLOCKSIZE of 64k
and then the second puts us over the 64k...<a name="line.79"></a>
-<span class="sourceLineNo">080</span> // so two Cells per block...<a
name="line.80"></a>
-<span class="sourceLineNo">081</span> /**<a name="line.81"></a>
-<span class="sourceLineNo">082</span> * Default size.<a name="line.82"></a>
-<span class="sourceLineNo">083</span> */<a name="line.83"></a>
-<span class="sourceLineNo">084</span> private static final int BLOCKSIZE = 64
* 1024;<a name="line.84"></a>
-<span class="sourceLineNo">085</span><a name="line.85"></a>
-<span class="sourceLineNo">086</span> /**<a name="line.86"></a>
-<span class="sourceLineNo">087</span> * Bucket sizes get multiplied by 4 for
actual bucket size.<a name="line.87"></a>
-<span class="sourceLineNo">088</span> * See {@link
BucketAllocator#FEWEST_ITEMS_IN_BUCKET}.<a name="line.88"></a>
-<span class="sourceLineNo">089</span> */<a name="line.89"></a>
-<span class="sourceLineNo">090</span> private static final int BUCKETSIZE =
125 * 1024;<a name="line.90"></a>
-<span class="sourceLineNo">091</span><a name="line.91"></a>
-<span class="sourceLineNo">092</span> /**<a name="line.92"></a>
-<span class="sourceLineNo">093</span> * Make it so one Cell is just under a
BLOCKSIZE. The second Cell puts us over the BLOCKSIZE<a name="line.93"></a>
-<span class="sourceLineNo">094</span> * so we have two Cells per
HFilBlock.<a name="line.94"></a>
-<span class="sourceLineNo">095</span> */<a name="line.95"></a>
-<span class="sourceLineNo">096</span> private static final int VALUE_SIZE =
33 * 1024;<a name="line.96"></a>
-<span class="sourceLineNo">097</span><a name="line.97"></a>
-<span class="sourceLineNo">098</span> @Before<a name="line.98"></a>
-<span class="sourceLineNo">099</span> public void before() throws IOException
{<a name="line.99"></a>
-<span class="sourceLineNo">100</span> // Do setup of a bucketcache that has
one bucket only. Enable trace-level logging for<a name="line.100"></a>
-<span class="sourceLineNo">101</span> // key classes.<a name="line.101"></a>
-<span class="sourceLineNo">102</span> this.conf =
TEST_UTIL.getConfiguration();<a name="line.102"></a>
-<span class="sourceLineNo">103</span> this.fs = FileSystem.get(conf);<a
name="line.103"></a>
-<span class="sourceLineNo">104</span><a name="line.104"></a>
-<span class="sourceLineNo">105</span> // Set BucketCache and HFileBlock to
log at trace level.<a name="line.105"></a>
-<span class="sourceLineNo">106</span> setTraceLevel(BucketCache.class);<a
name="line.106"></a>
-<span class="sourceLineNo">107</span> setTraceLevel(HFileBlock.class);<a
name="line.107"></a>
-<span class="sourceLineNo">108</span>
setTraceLevel(HFileReaderImpl.class);<a name="line.108"></a>
-<span class="sourceLineNo">109</span>
setTraceLevel(BucketAllocator.class);<a name="line.109"></a>
-<span class="sourceLineNo">110</span> }<a name="line.110"></a>
-<span class="sourceLineNo">111</span><a name="line.111"></a>
-<span class="sourceLineNo">112</span> // Assumes log4j logging.<a
name="line.112"></a>
-<span class="sourceLineNo">113</span> private static void setTraceLevel(final
Class<?> clazz) {<a name="line.113"></a>
-<span class="sourceLineNo">114</span> Log testlog =
LogFactory.getLog(clazz.getName());<a name="line.114"></a>
-<span class="sourceLineNo">115</span>
((org.apache.commons.logging.impl.Log4JLogger)testlog).getLogger().<a
name="line.115"></a>
-<span class="sourceLineNo">116</span>
setLevel(org.apache.log4j.Level.TRACE);<a name="line.116"></a>
-<span class="sourceLineNo">117</span> }<a name="line.117"></a>
-<span class="sourceLineNo">118</span><a name="line.118"></a>
-<span class="sourceLineNo">119</span> /**<a name="line.119"></a>
-<span class="sourceLineNo">120</span> * Test that bucketcache is caching and
that the persist of in-memory map works<a name="line.120"></a>
-<span class="sourceLineNo">121</span> * @throws IOException<a
name="line.121"></a>
-<span class="sourceLineNo">122</span> */<a name="line.122"></a>
-<span class="sourceLineNo">123</span> @Test<a name="line.123"></a>
-<span class="sourceLineNo">124</span> public void
testBucketCacheCachesAndPersists() throws IOException {<a name="line.124"></a>
-<span class="sourceLineNo">125</span> // Set up a bucket cache. Set up one
that will persist by passing a<a name="line.125"></a>
-<span class="sourceLineNo">126</span> // hbase.bucketcache.persistent.path
value to store the in-memory map of what is out in<a name="line.126"></a>
-<span class="sourceLineNo">127</span> // the file-backed bucketcache. Set
bucketcache to have one size only, BUCKETSIZE.<a name="line.127"></a>
-<span class="sourceLineNo">128</span> // See "MATH! SIZING FOR THE TEST!"
note above around declaration of BUCKETSIZE<a name="line.128"></a>
-<span class="sourceLineNo">129</span> String bucketCacheDataFile =<a
name="line.129"></a>
-<span class="sourceLineNo">130</span> (new
Path(TEST_UTIL.getDataTestDir(), "bucketcache.data")).toString();<a
name="line.130"></a>
-<span class="sourceLineNo">131</span> (new
File(bucketCacheDataFile)).getParentFile().mkdirs();<a name="line.131"></a>
-<span class="sourceLineNo">132</span>
this.conf.set("hbase.bucketcache.ioengine", "file:" + bucketCacheDataFile);<a
name="line.132"></a>
-<span class="sourceLineNo">133</span>
this.conf.set("hbase.bucketcache.persistent.path", bucketCacheDataFile +
".map");<a name="line.133"></a>
-<span class="sourceLineNo">134</span>
this.conf.setStrings("hbase.bucketcache.bucket.sizes",
Integer.toString(BUCKETSIZE));<a name="line.134"></a>
-<span class="sourceLineNo">135</span> // This is minimum bucketcache
size.... 1MB.<a name="line.135"></a>
-<span class="sourceLineNo">136</span>
this.conf.setInt("hbase.bucketcache.size", 1);<a name="line.136"></a>
-<span class="sourceLineNo">137</span> CacheConfig cacheConfig = new
CacheConfig(conf);<a name="line.137"></a>
-<span class="sourceLineNo">138</span> Path hfilePath = new
Path(TEST_UTIL.getDataTestDir(), this.name.getMethodName());<a
name="line.138"></a>
-<span class="sourceLineNo">139</span> // Write 8 entries which should make
for four hfileBlocks.<a name="line.139"></a>
-<span class="sourceLineNo">140</span> final int count = 8;<a
name="line.140"></a>
-<span class="sourceLineNo">141</span> final int hfileBlockCount = 4;<a
name="line.141"></a>
-<span class="sourceLineNo">142</span> List<Cell> writtenCells =
writeFile(hfilePath, Compression.Algorithm.NONE, cacheConfig, count);<a
name="line.142"></a>
-<span class="sourceLineNo">143</span> CacheStats stats =
cacheConfig.getBlockCache().getStats();<a name="line.143"></a>
-<span class="sourceLineNo">144</span> List<Cell> readCells =
readFile(hfilePath, cacheConfig);<a name="line.144"></a>
-<span class="sourceLineNo">145</span>
assertTrue(!writtenCells.isEmpty());<a name="line.145"></a>
-<span class="sourceLineNo">146</span> assertEquals(writtenCells.size(),
readCells.size());<a name="line.146"></a>
-<span class="sourceLineNo">147</span> assertEquals(hfileBlockCount,
stats.getMissCount());<a name="line.147"></a>
-<span class="sourceLineNo">148</span> assertEquals(1, stats.getHitCount());
// readFile will read first block is from cache.<a name="line.148"></a>
-<span class="sourceLineNo">149</span><a name="line.149"></a>
-<span class="sourceLineNo">150</span> // Now, close out the cache and then
reopen and verify that cache still has our blocks.<a name="line.150"></a>
-<span class="sourceLineNo">151</span> // Assert that persistence works.<a
name="line.151"></a>
-<span class="sourceLineNo">152</span>
cacheConfig.getBlockCache().shutdown();<a name="line.152"></a>
-<span class="sourceLineNo">153</span> // Need to clear the global cache
else the new CacheConfig won't create a bucketcache but<a name="line.153"></a>
-<span class="sourceLineNo">154</span> // just reuse the old one.<a
name="line.154"></a>
-<span class="sourceLineNo">155</span>
CacheConfig.GLOBAL_BLOCK_CACHE_INSTANCE = null;<a name="line.155"></a>
-<span class="sourceLineNo">156</span> cacheConfig = new
CacheConfig(conf);<a name="line.156"></a>
-<span class="sourceLineNo">157</span> stats =
cacheConfig.getBlockCache().getStats();<a name="line.157"></a>
-<span class="sourceLineNo">158</span> assertEquals(0,
stats.getHitCachingCount());<a name="line.158"></a>
-<span class="sourceLineNo">159</span> readCells = readFile(hfilePath,
cacheConfig);<a name="line.159"></a>
-<span class="sourceLineNo">160</span> // readFile will read all hfileblocs
in the file, hfileBlockCount, and then one more, so + 1.<a name="line.160"></a>
-<span class="sourceLineNo">161</span> assertEquals(hfileBlockCount + 1,
stats.getHitCachingCount());<a name="line.161"></a>
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-<span class="sourceLineNo">163</span><a name="line.163"></a>
-<span class="sourceLineNo">164</span> /**<a name="line.164"></a>
-<span class="sourceLineNo">165</span> * Write a file with
<code>count</code> entries.<a name="line.165"></a>
-<span class="sourceLineNo">166</span> * @return The Cells written to the
file.<a name="line.166"></a>
-<span class="sourceLineNo">167</span> * @throws IOException<a
name="line.167"></a>
-<span class="sourceLineNo">168</span> */<a name="line.168"></a>
-<span class="sourceLineNo">169</span> private List<Cell>
writeFile(final Path hfilePath, final Compression.Algorithm compressAlgo,<a
name="line.169"></a>
-<span class="sourceLineNo">170</span> final CacheConfig cacheConfig,
final int count)<a name="line.170"></a>
-<span class="sourceLineNo">171</span> throws IOException {<a
name="line.171"></a>
-<span class="sourceLineNo">172</span> List<Cell> cells = new
ArrayList<Cell>(count);<a name="line.172"></a>
-<span class="sourceLineNo">173</span> HFileContext context =<a
name="line.173"></a>
-<span class="sourceLineNo">174</span> new
HFileContextBuilder().withBlockSize(BLOCKSIZE).withCompression(compressAlgo).build();<a
name="line.174"></a>
-<span class="sourceLineNo">175</span> try (HFile.Writer writer = new
HFile.WriterFactory(conf, cacheConfig).<a name="line.175"></a>
-<span class="sourceLineNo">176</span> withPath(fs, hfilePath).<a
name="line.176"></a>
-<span class="sourceLineNo">177</span> withFileContext(context).<a
name="line.177"></a>
-<span class="sourceLineNo">178</span>
withComparator(CellComparator.COMPARATOR).<a name="line.178"></a>
-<span class="sourceLineNo">179</span> create()) {<a name="line.179"></a>
-<span class="sourceLineNo">180</span> byte [] valueBytes = new byte
[VALUE_SIZE];<a name="line.180"></a>
-<span class="sourceLineNo">181</span> for (int i = 0; i <
valueBytes.length; i++) valueBytes[i] = '0';<a name="line.181"></a>
-<span class="sourceLineNo">182</span> for (int i = 0; i < count; ++i)
{<a name="line.182"></a>
-<span class="sourceLineNo">183</span> byte[] keyBytes = format(i);<a
name="line.183"></a>
-<span class="sourceLineNo">184</span> KeyValue keyValue = new
KeyValue(keyBytes, HConstants.CATALOG_FAMILY, keyBytes,<a name="line.184"></a>
-<span class="sourceLineNo">185</span> HConstants.LATEST_TIMESTAMP,
valueBytes);<a name="line.185"></a>
-<span class="sourceLineNo">186</span> writer.append(keyValue);<a
name="line.186"></a>
-<span class="sourceLineNo">187</span> cells.add(keyValue);<a
name="line.187"></a>
-<span class="sourceLineNo">188</span> }<a name="line.188"></a>
-<span class="sourceLineNo">189</span> }<a name="line.189"></a>
-<span class="sourceLineNo">190</span> return cells;<a name="line.190"></a>
-<span class="sourceLineNo">191</span> }<a name="line.191"></a>
-<span class="sourceLineNo">192</span><a name="line.192"></a>
-<span class="sourceLineNo">193</span> /**<a name="line.193"></a>
-<span class="sourceLineNo">194</span> * Read the whole file, then read the
first block so we get something from cache for sure.<a name="line.194"></a>
-<span class="sourceLineNo">195</span> * So... there are TOTAL_BLOCKS_IN_FILE
read + 1. See math at head of this class.<a name="line.195"></a>
-<span class="sourceLineNo">196</span> * @return The Cells read from the
file.<a name="line.196"></a>
-<span class="sourceLineNo">197</span> */<a name="line.197"></a>
-<span class="sourceLineNo">198</span> private List<Cell> readFile(final
Path hfilePath, final CacheConfig cacheConfig)<a name="line.198"></a>
-<span class="sourceLineNo">199</span> throws IOException {<a
name="line.199"></a>
-<span class="sourceLineNo">200</span> List<Cell> cells = new
ArrayList<Cell>();<a name="line.200"></a>
-<span class="sourceLineNo">201</span> try (HFile.Reader reader =
HFile.createReader(this.fs, hfilePath, cacheConfig, this.conf);<a
name="line.201"></a>
-<span class="sourceLineNo">202</span> HFileScanner scanner =
reader.getScanner(true, true)) {<a name="line.202"></a>
-<span class="sourceLineNo">203</span> scanner.seekTo();<a
name="line.203"></a>
-<span class="sourceLineNo">204</span> do {<a name="line.204"></a>
-<span class="sourceLineNo">205</span> cells.add(scanner.getCell());<a
name="line.205"></a>
-<span class="sourceLineNo">206</span> LOG.info(scanner.getKey());<a
name="line.206"></a>
-<span class="sourceLineNo">207</span> } while (scanner.next());<a
name="line.207"></a>
-<span class="sourceLineNo">208</span> // Do a random seek just so we see
a block coming from cache.<a name="line.208"></a>
-<span class="sourceLineNo">209</span>
scanner.seekTo(reader.getFirstKey());<a name="line.209"></a>
-<span class="sourceLineNo">210</span> scanner.next();<a
name="line.210"></a>
-<span class="sourceLineNo">211</span> LOG.info(scanner.getCell());<a
name="line.211"></a>
-<span class="sourceLineNo">212</span> }<a name="line.212"></a>
-<span class="sourceLineNo">213</span> return cells;<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> /*<a name="line.216"></a>
-<span class="sourceLineNo">217</span> * Format passed integer.<a
name="line.217"></a>
-<span class="sourceLineNo">218</span> * @param number<a name="line.218"></a>
-<span class="sourceLineNo">219</span> * @return Returns zero-prefixed
ROW_LENGTH-byte wide decimal version of passed<a name="line.219"></a>
-<span class="sourceLineNo">220</span> * number (Does absolute in case number
is negative).<a name="line.220"></a>
-<span class="sourceLineNo">221</span> */<a name="line.221"></a>
-<span class="sourceLineNo">222</span> private static byte [] format(final int
number) {<a name="line.222"></a>
-<span class="sourceLineNo">223</span> byte [] b = new byte[ROW_LENGTH];<a
name="line.223"></a>
-<span class="sourceLineNo">224</span> int d = Math.abs(number);<a
name="line.224"></a>
-<span class="sourceLineNo">225</span> for (int i = b.length - 1; i >= 0;
i--) {<a name="line.225"></a>
-<span class="sourceLineNo">226</span> b[i] = (byte)((d % 10) + '0');<a
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-<span class="sourceLineNo">227</span> d /= 10;<a name="line.227"></a>
-<span class="sourceLineNo">228</span> }<a name="line.228"></a>
-<span class="sourceLineNo">229</span> return b;<a name="line.229"></a>
-<span class="sourceLineNo">230</span> }<a name="line.230"></a>
-<span class="sourceLineNo">231</span>}<a name="line.231"></a>
+<span class="sourceLineNo">078</span> // Cache totalSize=532480, buckets=1,
bucket capacity=<a name="line.78"></a>
+<span class="sourceLineNo">079</span> //
532480=(4*133120)=(FEWEST_ITEMS_IN_BUCKET*(largest configured bucketcache
size))<a name="line.79"></a>
+<span class="sourceLineNo">080</span> //<a name="line.80"></a>
+<span class="sourceLineNo">081</span> // Now into this one big bucket, we
write hfileblocks....Each hfileblock has two keys because<a name="line.81"></a>
+<span class="sourceLineNo">082</span> // first is under the BLOCKSIZE of 64k
and then the second puts us over the 64k...<a name="line.82"></a>
+<span class="sourceLineNo">083</span> // so two Cells per block...<a
name="line.83"></a>
+<span class="sourceLineNo">084</span> /**<a name="line.84"></a>
+<span class="sourceLineNo">085</span> * Default size.<a name="line.85"></a>
+<span class="sourceLineNo">086</span> */<a name="line.86"></a>
+<span class="sourceLineNo">087</span> private static final int BLOCKSIZE = 64
* 1024;<a name="line.87"></a>
+<span class="sourceLineNo">088</span><a name="line.88"></a>
+<span class="sourceLineNo">089</span> /**<a name="line.89"></a>
+<span class="sourceLineNo">090</span> * Bucket sizes get multiplied by 4 for
actual bucket size.<a name="line.90"></a>
+<span class="sourceLineNo">091</span> * See {@link
BucketAllocator#FEWEST_ITEMS_IN_BUCKET}.<a name="line.91"></a>
+<span class="sourceLineNo">092</span> */<a name="line.92"></a>
+<span class="sourceLineNo">093</span> private static final int BUCKETSIZE =
125 * 1024;<a name="line.93"></a>
+<span class="sourceLineNo">094</span><a name="line.94"></a>
+<span class="sourceLineNo">095</span> /**<a name="line.95"></a>
+<span class="sourceLineNo">096</span> * Make it so one Cell is just under a
BLOCKSIZE. The second Cell puts us over the BLOCKSIZE<a name="line.96"></a>
+<span class="sourceLineNo">097</span> * so we have two Cells per
HFilBlock.<a name="line.97"></a>
+<span class="sourceLineNo">098</span> */<a name="line.98"></a>
+<span class="sourceLineNo">099</span> private static final int VALUE_SIZE =
33 * 1024;<a name="line.99"></a>
+<span class="sourceLineNo">100</span><a name="line.100"></a>
+<span class="sourceLineNo">101</span> @Before<a name="line.101"></a>
+<span class="sourceLineNo">102</span> public void before() throws IOException
{<a name="line.102"></a>
+<span class="sourceLineNo">103</span> // Do setup of a bucketcache that has
one bucket only. Enable trace-level logging for<a name="line.103"></a>
+<span class="sourceLineNo">104</span> // key classes.<a name="line.104"></a>
+<span class="sourceLineNo">105</span> this.conf =
TEST_UTIL.getConfiguration();<a name="line.105"></a>
+<span class="sourceLineNo">106</span> this.fs = FileSystem.get(conf);<a
name="line.106"></a>
+<span class="sourceLineNo">107</span><a name="line.107"></a>
+<span class="sourceLineNo">108</span> // Set BucketCache and HFileBlock to
log at trace level.<a name="line.108"></a>
+<span class="sourceLineNo">109</span> setTraceLevel(BucketCache.class);<a
name="line.109"></a>
+<span class="sourceLineNo">110</span> setTraceLevel(HFileBlock.class);<a
name="line.110"></a>
+<span class="sourceLineNo">111</span>
setTraceLevel(HFileReaderImpl.class);<a name="line.111"></a>
+<span class="sourceLineNo">112</span>
setTraceLevel(BucketAllocator.class);<a name="line.112"></a>
+<span class="sourceLineNo">113</span> }<a name="line.113"></a>
+<span class="sourceLineNo">114</span><a name="line.114"></a>
+<span class="sourceLineNo">115</span> // Assumes log4j logging.<a
name="line.115"></a>
+<span class="sourceLineNo">116</span> private static void setTraceLevel(final
Class<?> clazz) {<a name="line.116"></a>
+<span class="sourceLineNo">117</span> Log testlog =
LogFactory.getLog(clazz.getName());<a name="line.117"></a>
+<span class="sourceLineNo">118</span>
((org.apache.commons.logging.impl.Log4JLogger)testlog).getLogger().<a
name="line.118"></a>
+<span class="sourceLineNo">119</span>
setLevel(org.apache.log4j.Level.TRACE);<a name="line.119"></a>
+<span class="sourceLineNo">120</span> }<a name="line.120"></a>
+<span class="sourceLineNo">121</span><a name="line.121"></a>
+<span class="sourceLineNo">122</span> /**<a name="line.122"></a>
+<span class="sourceLineNo">123</span> * Test that bucketcache is caching and
that the persist of in-memory map works<a name="line.123"></a>
+<span class="sourceLineNo">124</span> * @throws IOException<a
name="line.124"></a>
+<span class="sourceLineNo">125</span> */<a name="line.125"></a>
+<span class="sourceLineNo">126</span> @Test<a name="line.126"></a>
+<span class="sourceLineNo">127</span> public void
testBucketCacheCachesAndPersists() throws IOException {<a name="line.127"></a>
+<span class="sourceLineNo">128</span> // Set up a bucket cache. Set up one
that will persist by passing a<a name="line.128"></a>
+<span class="sourceLineNo">129</span> // hbase.bucketcache.persistent.path
value to store the in-memory map of what is out in<a name="line.129"></a>
+<span class="sourceLineNo">130</span> // the file-backed bucketcache. Set
bucketcache to have one size only, BUCKETSIZE.<a name="line.130"></a>
+<span class="sourceLineNo">131</span> // See "MATH! SIZING FOR THE TEST!"
note above around declaration of BUCKETSIZE<a name="line.131"></a>
+<span class="sourceLineNo">132</span> String bucketCacheDataFile =<a
name="line.132"></a>
+<span class="sourceLineNo">133</span> (new
Path(TEST_UTIL.getDataTestDir(), "bucketcache.data")).toString();<a
name="line.133"></a>
+<span class="sourceLineNo">134</span> (new
File(bucketCacheDataFile)).getParentFile().mkdirs();<a name="line.134"></a>
+<span class="sourceLineNo">135</span>
this.conf.set("hbase.bucketcache.ioengine", "file:" + bucketCacheDataFile);<a
name="line.135"></a>
+<span class="sourceLineNo">136</span>
this.conf.set("hbase.bucketcache.persistent.path", bucketCacheDataFile +
".map");<a name="line.136"></a>
+<span class="sourceLineNo">137</span>
this.conf.setStrings("hbase.bucketcache.bucket.sizes",
Integer.toString(BUCKETSIZE));<a name="line.137"></a>
+<span class="sourceLineNo">138</span> // This is minimum bucketcache
size.... 1MB.<a name="line.138"></a>
+<span class="sourceLineNo">139</span>
this.conf.setInt("hbase.bucketcache.size", 1);<a name="line.139"></a>
+<span class="sourceLineNo">140</span> // Write 8 entries which should make
for four hfileBlocks.<a name="line.140"></a>
+<span class="sourceLineNo">141</span> final int count = 8;<a
name="line.141"></a>
+<span class="sourceLineNo">142</span> final int hfileBlockCount = 4;<a
name="line.142"></a>
+<span class="sourceLineNo">143</span> Path hfilePath = new
Path(TEST_UTIL.getDataTestDir(), this.name.getMethodName());<a
name="line.143"></a>
+<span class="sourceLineNo">144</span> // Clear out any existing global
cache instance. Will pollute our tests below. Any concurrent<a
name="line.144"></a>
+<span class="sourceLineNo">145</span> // running test will pollute our
results below.<a name="line.145"></a>
+<span class="sourceLineNo">146</span>
CacheConfig.GLOBAL_BLOCK_CACHE_INSTANCE = null;<a name="line.146"></a>
+<span class="sourceLineNo">147</span> CacheConfig cacheConfig = new
CacheConfig(conf);<a name="line.147"></a>
+<span class="sourceLineNo">148</span> List<Cell> writtenCells =
writeFile(hfilePath, Compression.Algorithm.NONE, cacheConfig, count);<a
name="line.148"></a>
+<span class="sourceLineNo">149</span> CacheStats stats =
cacheConfig.getBlockCache().getStats();<a name="line.149"></a>
+<span class="sourceLineNo">150</span> List<Cell> readCells =
readFile(hfilePath, cacheConfig);<a name="line.150"></a>
+<span class="sourceLineNo">151</span>
assertTrue(!writtenCells.isEmpty());<a name="line.151"></a>
+<span class="sourceLineNo">152</span> assertEquals(writtenCells.size(),
readCells.size());<a name="line.152"></a>
+<span class="sourceLineNo">153</span> assertEquals(hfileBlockCount,
stats.getMissCount());<a name="line.153"></a>
+<span class="sourceLineNo">154</span> assertEquals(1, stats.getHitCount());
// readFile will read first block is from cache.<a name="line.154"></a>
+<span class="sourceLineNo">155</span><a name="line.155"></a>
+<span class="sourceLineNo">156</span> // Now, close out the cache and then
reopen and verify that cache still has our blocks.<a name="line.156"></a>
+<span class="sourceLineNo">157</span> // Assert that persistence works.<a
name="line.157"></a>
+<span class="sourceLineNo">158</span>
cacheConfig.getBlockCache().shutdown();<a name="line.158"></a>
+<span class="sourceLineNo">159</span> // Need to clear the global cache
else the new CacheConfig won't create a bucketcache but<a name="line.159"></a>
+<span class="sourceLineNo">160</span> // just reuse the old one.<a
name="line.160"></a>
+<span class="sourceLineNo">161</span>
CacheConfig.GLOBAL_BLOCK_CACHE_INSTANCE = null;<a name="line.161"></a>
+<span class="sourceLineNo">162</span> cacheConfig = new
CacheConfig(conf);<a name="line.162"></a>
+<span class="sourceLineNo">163</span> stats =
cacheConfig.getBlockCache().getStats();<a name="line.163"></a>
+<span class="sourceLineNo">164</span> assertEquals(0,
stats.getHitCachingCount());<a name="line.164"></a>
+<span class="sourceLineNo">165</span> readCells = readFile(hfilePath,
cacheConfig);<a name="line.165"></a>
+<span class="sourceLineNo">166</span> // readFile will read all hfileblocs
in the file, hfileBlockCount, and then one more, so + 1.<a name="line.166"></a>
+<span class="sourceLineNo">167</span> assertEquals(hfileBlockCount + 1,
stats.getHitCachingCount());<a name="line.167"></a>
+<span class="sourceLineNo">168</span> }<a name="line.168"></a>
+<span class="sourceLineNo">169</span><a name="line.169"></a>
+<span class="sourceLineNo">170</span> /**<a name="line.170"></a>
+<span class="sourceLineNo">171</span> * Write a file with
<code>count</code> entries.<a name="line.171"></a>
+<span class="sourceLineNo">172</span> * @return The Cells written to the
file.<a name="line.172"></a>
+<span class="sourceLineNo">173</span> * @throws IOException<a
name="line.173"></a>
+<span class="sourceLineNo">174</span> */<a name="line.174"></a>
+<span class="sourceLineNo">175</span> private List<Cell>
writeFile(final Path hfilePath, final Compression.Algorithm compressAlgo,<a
name="line.175"></a>
+<span class="sourceLineNo">176</span> final CacheConfig cacheConfig,
final int count)<a name="line.176"></a>
+<span class="sourceLineNo">177</span> throws IOException {<a
name="line.177"></a>
+<span class="sourceLineNo">178</span> List<Cell> cells = new
ArrayList<Cell>(count);<a name="line.178"></a>
+<span class="sourceLineNo">179</span> HFileContext context =<a
name="line.179"></a>
+<span class="sourceLineNo">180</span> new
HFileContextBuilder().withBlockSize(BLOCKSIZE).withCompression(compressAlgo).build();<a
name="line.180"></a>
+<span class="sourceLineNo">181</span> try (HFile.Writer writer = new
HFile.WriterFactory(conf, cacheConfig).<a name="line.181"></a>
+<span class="sourceLineNo">182</span> withPath(fs, hfilePath).<a
name="line.182"></a>
+<span class="sourceLineNo">183</span> withFileContext(context).<a
name="line.183"></a>
+<span class="sourceLineNo">184</span>
withComparator(CellComparator.COMPARATOR).<a name="line.184"></a>
+<span class="sourceLineNo">185</span> create()) {<a name="line.185"></a>
+<span class="sourceLineNo">186</span> byte [] valueBytes = new byte
[VALUE_SIZE];<a name="line.186"></a>
+<span class="sourceLineNo">187</span> for (int i = 0; i <
valueBytes.length; i++) valueBytes[i] = '0';<a name="line.187"></a>
+<span class="sourceLineNo">188</span> for (int i = 0; i < count; ++i)
{<a name="line.188"></a>
+<span class="sourceLineNo">189</span> byte[] keyBytes = format(i);<a
name="line.189"></a>
+<span class="sourceLineNo">190</span> KeyValue keyValue = new
KeyValue(keyBytes, HConstants.CATALOG_FAMILY, keyBytes,<a name="line.190"></a>
+<span class="sourceLineNo">191</span> HConstants.LATEST_TIMESTAMP,
valueBytes);<a name="line.191"></a>
+<span class="sourceLineNo">192</span> writer.append(keyValue);<a
name="line.192"></a>
+<span class="sourceLineNo">193</span> cells.add(keyValue);<a
name="line.193"></a>
+<span class="sourceLineNo">194</span> }<a name="line.194"></a>
+<span class="sourceLineNo">195</span> }<a name="line.195"></a>
+<span class="sourceLineNo">196</span> return cells;<a name="line.196"></a>
+<span class="sourceLineNo">197</span> }<a name="line.197"></a>
+<span class="sourceLineNo">198</span><a name="line.198"></a>
+<span class="sourceLineNo">199</span> /**<a name="line.199"></a>
+<span class="sourceLineNo">200</span> * Read the whole file, then read the
first block so we get something from cache for sure.<a name="line.200"></a>
+<span class="sourceLineNo">201</span> * So... there are TOTAL_BLOCKS_IN_FILE
read + 1. See math at head of this class.<a name="line.201"></a>
+<span class="sourceLineNo">202</span> * @return The Cells read from the
file.<a name="line.202"></a>
+<span class="sourceLineNo">203</span> */<a name="line.203"></a>
+<span class="sourceLineNo">204</span> private List<Cell> readFile(final
Path hfilePath, final CacheConfig cacheConfig)<a name="line.204"></a>
+<span class="sourceLineNo">205</span> throws IOException {<a
name="line.205"></a>
+<span class="sourceLineNo">206</span> List<Cell> cells = new
ArrayList<Cell>();<a name="line.206"></a>
+<span class="sourceLineNo">207</span> try (HFile.Reader reader =
HFile.createReader(this.fs, hfilePath, cacheConfig, this.conf);<a
name="line.207"></a>
+<span class="sourceLineNo">208</span> HFileScanner scanner =
reader.getScanner(true, true)) {<a name="line.208"></a>
+<span class="sourceLineNo">209</span> scanner.seekTo();<a
name="line.209"></a>
+<span class="sourceLineNo">210</span> do {<a name="line.210"></a>
+<span class="sourceLineNo">211</span> cells.add(scanner.getCell());<a
name="line.211"></a>
+<span class="sourceLineNo">212</span> LOG.info(scanner.getKey());<a
name="line.212"></a>
+<span class="sourceLineNo">213</span> } while (scanner.next());<a
name="line.213"></a>
+<span class="sourceLineNo">214</span> // Do a random seek just so we see
a block coming from cache.<a name="line.214"></a>
+<span class="sourceLineNo">215</span>
scanner.seekTo(reader.getFirstKey());<a name="line.215"></a>
+<span class="sourceLineNo">216</span> scanner.next();<a
name="line.216"></a>
+<span class="sourceLineNo">217</span> LOG.info(scanner.getCell());<a
name="line.217"></a>
+<span class="sourceLineNo">218</span> }<a name="line.218"></a>
+<span class="sourceLineNo">219</span> return cells;<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> /*<a name="line.222"></a>
+<span class="sourceLineNo">223</span> * Format passed integer.<a
name="line.223"></a>
+<span class="sourceLineNo">224</span> * @param number<a name="line.224"></a>
+<span class="sourceLineNo">225</span> * @return Returns zero-prefixed
ROW_LENGTH-byte wide decimal version of passed<a name="line.225"></a>
+<span class="sourceLineNo">226</span> * number (Does absolute in case number
is negative).<a name="line.226"></a>
+<span class="sourceLineNo">227</span> */<a name="line.227"></a>
+<span class="sourceLineNo">228</span> private static byte [] format(final int
number) {<a name="line.228"></a>
+<span class="sourceLineNo">229</span> byte [] b = new byte[ROW_LENGTH];<a
name="line.229"></a>
+<span class="sourceLineNo">230</span> int d = Math.abs(number);<a
name="line.230"></a>
+<span class="sourceLineNo">231</span> for (int i = b.length - 1; i >= 0;
i--) {<a name="line.231"></a>
+<span class="sourceLineNo">232</span> b[i] = (byte)((d % 10) + '0');<a
name="line.232"></a>
+<span class="sourceLineNo">233</span> d /= 10;<a name="line.233"></a>
+<span class="sourceLineNo">234</span> }<a name="line.234"></a>
+<span class="sourceLineNo">235</span> return b;<a name="line.235"></a>
+<span class="sourceLineNo">236</span> }<a name="line.236"></a>
+<span class="sourceLineNo">237</span>}<a name="line.237"></a>
