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From mi...@apache.org
Subject [07/34] hbase-site git commit: Published site at 46cc3d4972d8db478c86e9848afed523cb6dc866.
Date Tue, 08 Mar 2016 18:05:42 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/58f51408/xref-test/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html
----------------------------------------------------------------------
diff --git a/xref-test/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html b/xref-test/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html
index b7fd4ef..feb3ecb 100644
--- a/xref-test/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html
+++ b/xref-test/org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html
@@ -52,7 +52,7 @@
 <a class="jxr_linenumber" name="42" href="#42">42</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.io.hfile.bucket.BucketAllocator;
 <a class="jxr_linenumber" name="43" href="#43">43</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache;
 <a class="jxr_linenumber" name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.testclassification.IOTests;
-<a class="jxr_linenumber" name="45" href="#45">45</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.testclassification.SmallTests;
+<a class="jxr_linenumber" name="45" href="#45">45</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.testclassification.LargeTests;
 <a class="jxr_linenumber" name="46" href="#46">46</a>  <strong class="jxr_keyword">import</strong> org.junit.Before;
 <a class="jxr_linenumber" name="47" href="#47">47</a>  <strong class="jxr_keyword">import</strong> org.junit.Rule;
 <a class="jxr_linenumber" name="48" href="#48">48</a>  <strong class="jxr_keyword">import</strong> org.junit.Test;
@@ -63,182 +63,188 @@
 <a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment">/**</em>
 <a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> * Test for file-backed BucketCache.</em>
 <a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="56" href="#56">56</a>  @Category({IOTests.<strong class="jxr_keyword">class</strong>, SmallTests.<strong class="jxr_keyword">class</strong>})
-<a class="jxr_linenumber" name="57" href="#57">57</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html">TestHFileBackedByBucketCache</a> {
-<a class="jxr_linenumber" name="58" href="#58">58</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(TestHFileBackedByBucketCache.<strong class="jxr_keyword">class</strong>);
-<a class="jxr_linenumber" name="59" href="#59">59</a>    @Rule <strong class="jxr_keyword">public</strong> TestName name = <strong class="jxr_keyword">new</strong> TestName();
-<a class="jxr_linenumber" name="60" href="#60">60</a>    @Rule <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> TestRule timeout = CategoryBasedTimeout.builder().withTimeout(<strong class="jxr_keyword">this</strong>.getClass()).
-<a class="jxr_linenumber" name="61" href="#61">61</a>        withLookingForStuckThread(<strong class="jxr_keyword">true</strong>).build();
-<a class="jxr_linenumber" name="62" href="#62">62</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/HBaseTestingUtility.html">HBaseTestingUtility</a> TEST_UTIL = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/HBaseTestingUtility.html">HBaseTestingUtility</a>();
-<a class="jxr_linenumber" name="63" href="#63">63</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> ROW_LENGTH = 4;
-<a class="jxr_linenumber" name="64" href="#64">64</a>    <strong class="jxr_keyword">private</strong> Configuration conf;
-<a class="jxr_linenumber" name="65" href="#65">65</a>    <strong class="jxr_keyword">private</strong> FileSystem fs;
-<a class="jxr_linenumber" name="66" href="#66">66</a>  
-<a class="jxr_linenumber" name="67" href="#67">67</a>    <em class="jxr_comment">// MATH! SIZING FOR THE TEST!</em>
-<a class="jxr_linenumber" name="68" href="#68">68</a>    <em class="jxr_comment">// Set bucketcache to be smallest size possible which is 1MB. We do that in the test</em>
-<a class="jxr_linenumber" name="69" href="#69">69</a>    <em class="jxr_comment">// @Before &lt;code&gt;before&lt;/code&gt; method. Into out 1MB cache, have it so only one bucket. If</em>
-<a class="jxr_linenumber" name="70" href="#70">70</a>    <em class="jxr_comment">// bucketsize is set to 125kb in size, we will have one bucket in our 1MB bucketcache. It is</em>
-<a class="jxr_linenumber" name="71" href="#71">71</a>    <em class="jxr_comment">// cryptic how this comes about but basically comes down to</em>
-<a class="jxr_linenumber" name="72" href="#72">72</a>    <em class="jxr_comment">// {@link BucketAllocator#FEWEST_ITEMS_IN_BUCKET} being '4'... so 4 * 125 = just over 500k or so</em>
-<a class="jxr_linenumber" name="73" href="#73">73</a>    <em class="jxr_comment">// which makes for one bucket only in 1M which you can see from TRACE logging:</em>
-<a class="jxr_linenumber" name="74" href="#74">74</a>    <em class="jxr_comment">//</em>
-<a class="jxr_linenumber" name="75" href="#75">75</a>    <em class="jxr_comment">// Cache totalSize=532480, buckets=1, bucket capacity=</em>
-<a class="jxr_linenumber" name="76" href="#76">76</a>    <em class="jxr_comment">//   532480=(4*133120)=(FEWEST_ITEMS_IN_BUCKET*(largest configured bucketcache size))</em>
+<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_comment">// This is marked a LargeTest so it runs in its own JVM. We do this because we are making use of</em>
+<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_comment">// the cache and the cache is global. We don't want any other concurrent test polluting ours which</em>
+<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_comment">// can happen if more than one test in a single JVM which can happen when tests are small.</em>
+<a class="jxr_linenumber" name="59" href="#59">59</a>  @Category({IOTests.<strong class="jxr_keyword">class</strong>, LargeTests.<strong class="jxr_keyword">class</strong>})
+<a class="jxr_linenumber" name="60" href="#60">60</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/TestHFileBackedByBucketCache.html">TestHFileBackedByBucketCache</a> {
+<a class="jxr_linenumber" name="61" href="#61">61</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(TestHFileBackedByBucketCache.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="62" href="#62">62</a>    @Rule <strong class="jxr_keyword">public</strong> TestName name = <strong class="jxr_keyword">new</strong> TestName();
+<a class="jxr_linenumber" name="63" href="#63">63</a>    @Rule <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> TestRule timeout = CategoryBasedTimeout.builder().withTimeout(<strong class="jxr_keyword">this</strong>.getClass()).
+<a class="jxr_linenumber" name="64" href="#64">64</a>        withLookingForStuckThread(<strong class="jxr_keyword">true</strong>).build();
+<a class="jxr_linenumber" name="65" href="#65">65</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/HBaseTestingUtility.html">HBaseTestingUtility</a> TEST_UTIL = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/HBaseTestingUtility.html">HBaseTestingUtility</a>();
+<a class="jxr_linenumber" name="66" href="#66">66</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> ROW_LENGTH = 4;
+<a class="jxr_linenumber" name="67" href="#67">67</a>    <strong class="jxr_keyword">private</strong> Configuration conf;
+<a class="jxr_linenumber" name="68" href="#68">68</a>    <strong class="jxr_keyword">private</strong> FileSystem fs;
+<a class="jxr_linenumber" name="69" href="#69">69</a>  
+<a class="jxr_linenumber" name="70" href="#70">70</a>    <em class="jxr_comment">// MATH! SIZING FOR THE TEST!</em>
+<a class="jxr_linenumber" name="71" href="#71">71</a>    <em class="jxr_comment">// Set bucketcache to be smallest size possible which is 1MB. We do that in the test</em>
+<a class="jxr_linenumber" name="72" href="#72">72</a>    <em class="jxr_comment">// @Before &lt;code&gt;before&lt;/code&gt; method. Into out 1MB cache, have it so only one bucket. If</em>
+<a class="jxr_linenumber" name="73" href="#73">73</a>    <em class="jxr_comment">// bucketsize is set to 125kb in size, we will have one bucket in our 1MB bucketcache. It is</em>
+<a class="jxr_linenumber" name="74" href="#74">74</a>    <em class="jxr_comment">// cryptic how this comes about but basically comes down to</em>
+<a class="jxr_linenumber" name="75" href="#75">75</a>    <em class="jxr_comment">// {@link BucketAllocator#FEWEST_ITEMS_IN_BUCKET} being '4'... so 4 * 125 = just over 500k or so</em>
+<a class="jxr_linenumber" name="76" href="#76">76</a>    <em class="jxr_comment">// which makes for one bucket only in 1M which you can see from TRACE logging:</em>
 <a class="jxr_linenumber" name="77" href="#77">77</a>    <em class="jxr_comment">//</em>
-<a class="jxr_linenumber" name="78" href="#78">78</a>    <em class="jxr_comment">// Now into this one big bucket, we write hfileblocks....Each hfileblock has two keys because</em>
-<a class="jxr_linenumber" name="79" href="#79">79</a>    <em class="jxr_comment">// first is under the BLOCKSIZE of 64k and then the second puts us over the 64k...</em>
-<a class="jxr_linenumber" name="80" href="#80">80</a>    <em class="jxr_comment">// so two Cells per block...</em>
-<a class="jxr_linenumber" name="81" href="#81">81</a>    <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="82" href="#82">82</a>  <em class="jxr_javadoccomment">   * Default size.</em>
-<a class="jxr_linenumber" name="83" href="#83">83</a>  <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="84" href="#84">84</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BLOCKSIZE = 64 * 1024;
-<a class="jxr_linenumber" name="85" href="#85">85</a>  
-<a class="jxr_linenumber" name="86" href="#86">86</a>    <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment">   * Bucket sizes get multiplied by 4 for actual bucket size.</em>
-<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment">   * See {@link BucketAllocator#FEWEST_ITEMS_IN_BUCKET}.</em>
-<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="90" href="#90">90</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BUCKETSIZE = 125 * 1024;
-<a class="jxr_linenumber" name="91" href="#91">91</a>  
-<a class="jxr_linenumber" name="92" href="#92">92</a>    <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="93" href="#93">93</a>  <em class="jxr_javadoccomment">   * Make it so one Cell is just under a BLOCKSIZE. The second Cell puts us over the BLOCKSIZE</em>
-<a class="jxr_linenumber" name="94" href="#94">94</a>  <em class="jxr_javadoccomment">   * so we have two Cells per HFilBlock.</em>
-<a class="jxr_linenumber" name="95" href="#95">95</a>  <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="96" href="#96">96</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> VALUE_SIZE = 33 * 1024;
-<a class="jxr_linenumber" name="97" href="#97">97</a>  
-<a class="jxr_linenumber" name="98" href="#98">98</a>    @Before
-<a class="jxr_linenumber" name="99" href="#99">99</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> before() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="100" href="#100">100</a>     <em class="jxr_comment">// Do setup of a bucketcache that has one bucket only. Enable trace-level logging for</em>
-<a class="jxr_linenumber" name="101" href="#101">101</a>     <em class="jxr_comment">// key classes.</em>
-<a class="jxr_linenumber" name="102" href="#102">102</a>     <strong class="jxr_keyword">this</strong>.conf = TEST_UTIL.getConfiguration();
-<a class="jxr_linenumber" name="103" href="#103">103</a>     <strong class="jxr_keyword">this</strong>.fs = FileSystem.get(conf);
-<a class="jxr_linenumber" name="104" href="#104">104</a> 
-<a class="jxr_linenumber" name="105" href="#105">105</a>     <em class="jxr_comment">// Set BucketCache and HFileBlock to log at trace level.</em>
-<a class="jxr_linenumber" name="106" href="#106">106</a>     setTraceLevel(BucketCache.<strong class="jxr_keyword">class</strong>);
-<a class="jxr_linenumber" name="107" href="#107">107</a>     setTraceLevel(HFileBlock.<strong class="jxr_keyword">class</strong>);
-<a class="jxr_linenumber" name="108" href="#108">108</a>     setTraceLevel(HFileReaderImpl.<strong class="jxr_keyword">class</strong>);
-<a class="jxr_linenumber" name="109" href="#109">109</a>     setTraceLevel(BucketAllocator.<strong class="jxr_keyword">class</strong>);
-<a class="jxr_linenumber" name="110" href="#110">110</a>   }
-<a class="jxr_linenumber" name="111" href="#111">111</a> 
-<a class="jxr_linenumber" name="112" href="#112">112</a>   <em class="jxr_comment">//  Assumes log4j logging.</em>
-<a class="jxr_linenumber" name="113" href="#113">113</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> setTraceLevel(<strong class="jxr_keyword">final</strong> Class&lt;?&gt; clazz) {
-<a class="jxr_linenumber" name="114" href="#114">114</a>     Log testlog = LogFactory.getLog(clazz.getName());
-<a class="jxr_linenumber" name="115" href="#115">115</a>     ((org.apache.commons.logging.impl.Log4JLogger)testlog).getLogger().
-<a class="jxr_linenumber" name="116" href="#116">116</a>       setLevel(org.apache.log4j.Level.TRACE);
-<a class="jxr_linenumber" name="117" href="#117">117</a>   }
-<a class="jxr_linenumber" name="118" href="#118">118</a> 
-<a class="jxr_linenumber" name="119" href="#119">119</a>   <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="120" href="#120">120</a> <em class="jxr_javadoccomment">   * Test that bucketcache is caching and that the persist of in-memory map works</em>
-<a class="jxr_linenumber" name="121" href="#121">121</a> <em class="jxr_javadoccomment">   * @throws IOException</em>
-<a class="jxr_linenumber" name="122" href="#122">122</a> <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="123" href="#123">123</a>   @Test
-<a class="jxr_linenumber" name="124" href="#124">124</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testBucketCacheCachesAndPersists() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="125" href="#125">125</a>     <em class="jxr_comment">// Set up a bucket cache. Set up one that will persist by passing a</em>
-<a class="jxr_linenumber" name="126" href="#126">126</a>     <em class="jxr_comment">// hbase.bucketcache.persistent.path value to store the in-memory map of what is out in</em>
-<a class="jxr_linenumber" name="127" href="#127">127</a>     <em class="jxr_comment">// the file-backed bucketcache. Set bucketcache to have one size only, BUCKETSIZE.</em>
-<a class="jxr_linenumber" name="128" href="#128">128</a>     <em class="jxr_comment">// See "MATH! SIZING FOR THE TEST!" note above around declaration of BUCKETSIZE</em>
-<a class="jxr_linenumber" name="129" href="#129">129</a>     String bucketCacheDataFile =
-<a class="jxr_linenumber" name="130" href="#130">130</a>       (<strong class="jxr_keyword">new</strong> Path(TEST_UTIL.getDataTestDir(), <span class="jxr_string">"bucketcache.data"</span>)).toString();
-<a class="jxr_linenumber" name="131" href="#131">131</a>     (<strong class="jxr_keyword">new</strong> File(bucketCacheDataFile)).getParentFile().mkdirs();
-<a class="jxr_linenumber" name="132" href="#132">132</a>     <strong class="jxr_keyword">this</strong>.conf.set(<span class="jxr_string">"hbase.bucketcache.ioengine"</span>, <span class="jxr_string">"file:"</span> + bucketCacheDataFile);
-<a class="jxr_linenumber" name="133" href="#133">133</a>     <strong class="jxr_keyword">this</strong>.conf.set(<span class="jxr_string">"hbase.bucketcache.persistent.path"</span>, bucketCacheDataFile + <span class="jxr_string">".map"</span>);
-<a class="jxr_linenumber" name="134" href="#134">134</a>     <strong class="jxr_keyword">this</strong>.conf.setStrings(<span class="jxr_string">"hbase.bucketcache.bucket.sizes"</span>, Integer.toString(BUCKETSIZE));
-<a class="jxr_linenumber" name="135" href="#135">135</a>     <em class="jxr_comment">// This is minimum bucketcache size.... 1MB.</em>
-<a class="jxr_linenumber" name="136" href="#136">136</a>     <strong class="jxr_keyword">this</strong>.conf.setInt(<span class="jxr_string">"hbase.bucketcache.size"</span>, 1);
-<a class="jxr_linenumber" name="137" href="#137">137</a>     CacheConfig cacheConfig = <strong class="jxr_keyword">new</strong> CacheConfig(conf);
-<a class="jxr_linenumber" name="138" href="#138">138</a>     Path hfilePath = <strong class="jxr_keyword">new</strong> Path(TEST_UTIL.getDataTestDir(), <strong class="jxr_keyword">this</strong>.name.getMethodName());
-<a class="jxr_linenumber" name="139" href="#139">139</a>     <em class="jxr_comment">// Write 8 entries which should make for four hfileBlocks.</em>
-<a class="jxr_linenumber" name="140" href="#140">140</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> count = 8;
-<a class="jxr_linenumber" name="141" href="#141">141</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> hfileBlockCount = 4;
-<a class="jxr_linenumber" name="142" href="#142">142</a>     List&lt;Cell&gt; writtenCells = writeFile(hfilePath, Compression.Algorithm.NONE, cacheConfig, count);
-<a class="jxr_linenumber" name="143" href="#143">143</a>     CacheStats stats = cacheConfig.getBlockCache().getStats();
-<a class="jxr_linenumber" name="144" href="#144">144</a>     List&lt;Cell&gt; readCells = readFile(hfilePath, cacheConfig);
-<a class="jxr_linenumber" name="145" href="#145">145</a>     assertTrue(!writtenCells.isEmpty());
-<a class="jxr_linenumber" name="146" href="#146">146</a>     assertEquals(writtenCells.size(), readCells.size());
-<a class="jxr_linenumber" name="147" href="#147">147</a>     assertEquals(hfileBlockCount, stats.getMissCount());
-<a class="jxr_linenumber" name="148" href="#148">148</a>     assertEquals(1, stats.getHitCount()); <em class="jxr_comment">// readFile will read first block is from cache.</em>
-<a class="jxr_linenumber" name="149" href="#149">149</a> 
-<a class="jxr_linenumber" name="150" href="#150">150</a>     <em class="jxr_comment">// Now, close out the cache and then reopen and verify that cache still has our blocks.</em>
-<a class="jxr_linenumber" name="151" href="#151">151</a>     <em class="jxr_comment">// Assert that persistence works.</em>
-<a class="jxr_linenumber" name="152" href="#152">152</a>     cacheConfig.getBlockCache().shutdown();
-<a class="jxr_linenumber" name="153" href="#153">153</a>     <em class="jxr_comment">// Need to clear the global cache else the new CacheConfig won't create a bucketcache but</em>
-<a class="jxr_linenumber" name="154" href="#154">154</a>     <em class="jxr_comment">// just reuse the old one.</em>
-<a class="jxr_linenumber" name="155" href="#155">155</a>     CacheConfig.GLOBAL_BLOCK_CACHE_INSTANCE = <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="156" href="#156">156</a>     cacheConfig = <strong class="jxr_keyword">new</strong> CacheConfig(conf);
-<a class="jxr_linenumber" name="157" href="#157">157</a>     stats = cacheConfig.getBlockCache().getStats();
-<a class="jxr_linenumber" name="158" href="#158">158</a>     assertEquals(0, stats.getHitCachingCount());
-<a class="jxr_linenumber" name="159" href="#159">159</a>     readCells = readFile(hfilePath, cacheConfig);
-<a class="jxr_linenumber" name="160" href="#160">160</a>     <em class="jxr_comment">// readFile will read all hfileblocs in the file, hfileBlockCount, and then one more, so + 1.</em>
-<a class="jxr_linenumber" name="161" href="#161">161</a>     assertEquals(hfileBlockCount + 1, stats.getHitCachingCount());
-<a class="jxr_linenumber" name="162" href="#162">162</a>   }
-<a class="jxr_linenumber" name="163" href="#163">163</a> 
-<a class="jxr_linenumber" name="164" href="#164">164</a>   <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="165" href="#165">165</a> <em class="jxr_javadoccomment">   * Write a file with &lt;code&gt;count&lt;/code&gt; entries.</em>
-<a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_javadoccomment">   * @return The Cells written to the file.</em>
-<a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_javadoccomment">   * @throws IOException</em>
-<a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="169" href="#169">169</a>   <strong class="jxr_keyword">private</strong> List&lt;Cell&gt; writeFile(<strong class="jxr_keyword">final</strong> Path hfilePath, <strong class="jxr_keyword">final</strong> Compression.Algorithm compressAlgo,
-<a class="jxr_linenumber" name="170" href="#170">170</a>       <strong class="jxr_keyword">final</strong> CacheConfig cacheConfig, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> count)
-<a class="jxr_linenumber" name="171" href="#171">171</a>   <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="172" href="#172">172</a>     List&lt;Cell&gt; cells = <strong class="jxr_keyword">new</strong> ArrayList&lt;Cell&gt;(count);
-<a class="jxr_linenumber" name="173" href="#173">173</a>     HFileContext context =
-<a class="jxr_linenumber" name="174" href="#174">174</a>         <strong class="jxr_keyword">new</strong> HFileContextBuilder().withBlockSize(BLOCKSIZE).withCompression(compressAlgo).build();
-<a class="jxr_linenumber" name="175" href="#175">175</a>     <strong class="jxr_keyword">try</strong> (HFile.Writer writer = <strong class="jxr_keyword">new</strong> HFile.WriterFactory(conf, cacheConfig).
-<a class="jxr_linenumber" name="176" href="#176">176</a>         withPath(fs, hfilePath).
-<a class="jxr_linenumber" name="177" href="#177">177</a>         withFileContext(context).
-<a class="jxr_linenumber" name="178" href="#178">178</a>         withComparator(CellComparator.COMPARATOR).
-<a class="jxr_linenumber" name="179" href="#179">179</a>         create()) {
-<a class="jxr_linenumber" name="180" href="#180">180</a>       byte [] valueBytes = <strong class="jxr_keyword">new</strong> byte [VALUE_SIZE];
-<a class="jxr_linenumber" name="181" href="#181">181</a>       <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; valueBytes.length; i++) valueBytes[i] = '0';
-<a class="jxr_linenumber" name="182" href="#182">182</a>       <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; count; ++i) {
-<a class="jxr_linenumber" name="183" href="#183">183</a>         byte[] keyBytes = format(i);
-<a class="jxr_linenumber" name="184" href="#184">184</a>         KeyValue keyValue = <strong class="jxr_keyword">new</strong> KeyValue(keyBytes, HConstants.CATALOG_FAMILY, keyBytes,
-<a class="jxr_linenumber" name="185" href="#185">185</a>             HConstants.LATEST_TIMESTAMP, valueBytes);
-<a class="jxr_linenumber" name="186" href="#186">186</a>         writer.append(keyValue);
-<a class="jxr_linenumber" name="187" href="#187">187</a>         cells.add(keyValue);
-<a class="jxr_linenumber" name="188" href="#188">188</a>       }
-<a class="jxr_linenumber" name="189" href="#189">189</a>     }
-<a class="jxr_linenumber" name="190" href="#190">190</a>     <strong class="jxr_keyword">return</strong> cells;
-<a class="jxr_linenumber" name="191" href="#191">191</a>   }
-<a class="jxr_linenumber" name="192" href="#192">192</a> 
-<a class="jxr_linenumber" name="193" href="#193">193</a>   <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="194" href="#194">194</a> <em class="jxr_javadoccomment">   * Read the whole file, then read the first block so we get something from cache for sure.</em>
-<a class="jxr_linenumber" name="195" href="#195">195</a> <em class="jxr_javadoccomment">   * So... there are TOTAL_BLOCKS_IN_FILE read + 1. See math at head of this class.</em>
-<a class="jxr_linenumber" name="196" href="#196">196</a> <em class="jxr_javadoccomment">   * @return The Cells read from the file.</em>
-<a class="jxr_linenumber" name="197" href="#197">197</a> <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="198" href="#198">198</a>   <strong class="jxr_keyword">private</strong> List&lt;Cell&gt; readFile(<strong class="jxr_keyword">final</strong> Path hfilePath, <strong class="jxr_keyword">final</strong> CacheConfig cacheConfig)
-<a class="jxr_linenumber" name="199" href="#199">199</a>   <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="200" href="#200">200</a>     List&lt;Cell&gt; cells = <strong class="jxr_keyword">new</strong> ArrayList&lt;Cell&gt;();
-<a class="jxr_linenumber" name="201" href="#201">201</a>     <strong class="jxr_keyword">try</strong> (HFile.Reader reader = HFile.createReader(<strong class="jxr_keyword">this</strong>.fs, hfilePath, cacheConfig, <strong class="jxr_keyword">this</strong>.conf);
-<a class="jxr_linenumber" name="202" href="#202">202</a>         HFileScanner scanner = reader.getScanner(<strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>)) {
-<a class="jxr_linenumber" name="203" href="#203">203</a>       scanner.seekTo();
-<a class="jxr_linenumber" name="204" href="#204">204</a>       <strong class="jxr_keyword">do</strong> {
-<a class="jxr_linenumber" name="205" href="#205">205</a>         cells.add(scanner.getCell());
-<a class="jxr_linenumber" name="206" href="#206">206</a>         LOG.info(scanner.getKey());
-<a class="jxr_linenumber" name="207" href="#207">207</a>       } <strong class="jxr_keyword">while</strong> (scanner.next());
-<a class="jxr_linenumber" name="208" href="#208">208</a>       <em class="jxr_comment">// Do a random seek just so we see a block coming from cache.</em>
-<a class="jxr_linenumber" name="209" href="#209">209</a>       scanner.seekTo(reader.getFirstKey());
-<a class="jxr_linenumber" name="210" href="#210">210</a>       scanner.next();
-<a class="jxr_linenumber" name="211" href="#211">211</a>       LOG.info(scanner.getCell());
-<a class="jxr_linenumber" name="212" href="#212">212</a>     }
-<a class="jxr_linenumber" name="213" href="#213">213</a>     <strong class="jxr_keyword">return</strong> cells;
-<a class="jxr_linenumber" name="214" href="#214">214</a>   }
-<a class="jxr_linenumber" name="215" href="#215">215</a> 
-<a class="jxr_linenumber" name="216" href="#216">216</a>   <em class="jxr_comment">/*</em>
-<a class="jxr_linenumber" name="217" href="#217">217</a> <em class="jxr_comment">   * Format passed integer.</em>
-<a class="jxr_linenumber" name="218" href="#218">218</a> <em class="jxr_comment">   * @param number</em>
-<a class="jxr_linenumber" name="219" href="#219">219</a> <em class="jxr_comment">   * @return Returns zero-prefixed ROW_LENGTH-byte wide decimal version of passed</em>
-<a class="jxr_linenumber" name="220" href="#220">220</a> <em class="jxr_comment">   * number (Does absolute in case number is negative).</em>
-<a class="jxr_linenumber" name="221" href="#221">221</a> <em class="jxr_comment">   */</em>
-<a class="jxr_linenumber" name="222" href="#222">222</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> byte [] format(<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> number) {
-<a class="jxr_linenumber" name="223" href="#223">223</a>     byte [] b = <strong class="jxr_keyword">new</strong> byte[ROW_LENGTH];
-<a class="jxr_linenumber" name="224" href="#224">224</a>     <strong class="jxr_keyword">int</strong> d = Math.abs(number);
-<a class="jxr_linenumber" name="225" href="#225">225</a>     <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = b.length - 1; i &gt;= 0; i--) {
-<a class="jxr_linenumber" name="226" href="#226">226</a>       b[i] = (byte)((d % 10) + '0');
-<a class="jxr_linenumber" name="227" href="#227">227</a>       d /= 10;
-<a class="jxr_linenumber" name="228" href="#228">228</a>     }
-<a class="jxr_linenumber" name="229" href="#229">229</a>     <strong class="jxr_keyword">return</strong> b;
-<a class="jxr_linenumber" name="230" href="#230">230</a>   }
-<a class="jxr_linenumber" name="231" href="#231">231</a> }
+<a class="jxr_linenumber" name="78" href="#78">78</a>    <em class="jxr_comment">// Cache totalSize=532480, buckets=1, bucket capacity=</em>
+<a class="jxr_linenumber" name="79" href="#79">79</a>    <em class="jxr_comment">//   532480=(4*133120)=(FEWEST_ITEMS_IN_BUCKET*(largest configured bucketcache size))</em>
+<a class="jxr_linenumber" name="80" href="#80">80</a>    <em class="jxr_comment">//</em>
+<a class="jxr_linenumber" name="81" href="#81">81</a>    <em class="jxr_comment">// Now into this one big bucket, we write hfileblocks....Each hfileblock has two keys because</em>
+<a class="jxr_linenumber" name="82" href="#82">82</a>    <em class="jxr_comment">// first is under the BLOCKSIZE of 64k and then the second puts us over the 64k...</em>
+<a class="jxr_linenumber" name="83" href="#83">83</a>    <em class="jxr_comment">// so two Cells per block...</em>
+<a class="jxr_linenumber" name="84" href="#84">84</a>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment">   * Default size.</em>
+<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="87" href="#87">87</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BLOCKSIZE = 64 * 1024;
+<a class="jxr_linenumber" name="88" href="#88">88</a>  
+<a class="jxr_linenumber" name="89" href="#89">89</a>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment">   * Bucket sizes get multiplied by 4 for actual bucket size.</em>
+<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment">   * See {@link BucketAllocator#FEWEST_ITEMS_IN_BUCKET}.</em>
+<a class="jxr_linenumber" name="92" href="#92">92</a>  <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="93" href="#93">93</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BUCKETSIZE = 125 * 1024;
+<a class="jxr_linenumber" name="94" href="#94">94</a>  
+<a class="jxr_linenumber" name="95" href="#95">95</a>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="96" href="#96">96</a>  <em class="jxr_javadoccomment">   * Make it so one Cell is just under a BLOCKSIZE. The second Cell puts us over the BLOCKSIZE</em>
+<a class="jxr_linenumber" name="97" href="#97">97</a>  <em class="jxr_javadoccomment">   * so we have two Cells per HFilBlock.</em>
+<a class="jxr_linenumber" name="98" href="#98">98</a>  <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="99" href="#99">99</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> VALUE_SIZE = 33 * 1024;
+<a class="jxr_linenumber" name="100" href="#100">100</a> 
+<a class="jxr_linenumber" name="101" href="#101">101</a>   @Before
+<a class="jxr_linenumber" name="102" href="#102">102</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> before() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="103" href="#103">103</a>     <em class="jxr_comment">// Do setup of a bucketcache that has one bucket only. Enable trace-level logging for</em>
+<a class="jxr_linenumber" name="104" href="#104">104</a>     <em class="jxr_comment">// key classes.</em>
+<a class="jxr_linenumber" name="105" href="#105">105</a>     <strong class="jxr_keyword">this</strong>.conf = TEST_UTIL.getConfiguration();
+<a class="jxr_linenumber" name="106" href="#106">106</a>     <strong class="jxr_keyword">this</strong>.fs = FileSystem.get(conf);
+<a class="jxr_linenumber" name="107" href="#107">107</a> 
+<a class="jxr_linenumber" name="108" href="#108">108</a>     <em class="jxr_comment">// Set BucketCache and HFileBlock to log at trace level.</em>
+<a class="jxr_linenumber" name="109" href="#109">109</a>     setTraceLevel(BucketCache.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="110" href="#110">110</a>     setTraceLevel(HFileBlock.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="111" href="#111">111</a>     setTraceLevel(HFileReaderImpl.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="112" href="#112">112</a>     setTraceLevel(BucketAllocator.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="113" href="#113">113</a>   }
+<a class="jxr_linenumber" name="114" href="#114">114</a> 
+<a class="jxr_linenumber" name="115" href="#115">115</a>   <em class="jxr_comment">//  Assumes log4j logging.</em>
+<a class="jxr_linenumber" name="116" href="#116">116</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> setTraceLevel(<strong class="jxr_keyword">final</strong> Class&lt;?&gt; clazz) {
+<a class="jxr_linenumber" name="117" href="#117">117</a>     Log testlog = LogFactory.getLog(clazz.getName());
+<a class="jxr_linenumber" name="118" href="#118">118</a>     ((org.apache.commons.logging.impl.Log4JLogger)testlog).getLogger().
+<a class="jxr_linenumber" name="119" href="#119">119</a>       setLevel(org.apache.log4j.Level.TRACE);
+<a class="jxr_linenumber" name="120" href="#120">120</a>   }
+<a class="jxr_linenumber" name="121" href="#121">121</a> 
+<a class="jxr_linenumber" name="122" href="#122">122</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="123" href="#123">123</a> <em class="jxr_javadoccomment">   * Test that bucketcache is caching and that the persist of in-memory map works</em>
+<a class="jxr_linenumber" name="124" href="#124">124</a> <em class="jxr_javadoccomment">   * @throws IOException</em>
+<a class="jxr_linenumber" name="125" href="#125">125</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="126" href="#126">126</a>   @Test
+<a class="jxr_linenumber" name="127" href="#127">127</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testBucketCacheCachesAndPersists() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="128" href="#128">128</a>     <em class="jxr_comment">// Set up a bucket cache. Set up one that will persist by passing a</em>
+<a class="jxr_linenumber" name="129" href="#129">129</a>     <em class="jxr_comment">// hbase.bucketcache.persistent.path value to store the in-memory map of what is out in</em>
+<a class="jxr_linenumber" name="130" href="#130">130</a>     <em class="jxr_comment">// the file-backed bucketcache. Set bucketcache to have one size only, BUCKETSIZE.</em>
+<a class="jxr_linenumber" name="131" href="#131">131</a>     <em class="jxr_comment">// See "MATH! SIZING FOR THE TEST!" note above around declaration of BUCKETSIZE</em>
+<a class="jxr_linenumber" name="132" href="#132">132</a>     String bucketCacheDataFile =
+<a class="jxr_linenumber" name="133" href="#133">133</a>       (<strong class="jxr_keyword">new</strong> Path(TEST_UTIL.getDataTestDir(), <span class="jxr_string">"bucketcache.data"</span>)).toString();
+<a class="jxr_linenumber" name="134" href="#134">134</a>     (<strong class="jxr_keyword">new</strong> File(bucketCacheDataFile)).getParentFile().mkdirs();
+<a class="jxr_linenumber" name="135" href="#135">135</a>     <strong class="jxr_keyword">this</strong>.conf.set(<span class="jxr_string">"hbase.bucketcache.ioengine"</span>, <span class="jxr_string">"file:"</span> + bucketCacheDataFile);
+<a class="jxr_linenumber" name="136" href="#136">136</a>     <strong class="jxr_keyword">this</strong>.conf.set(<span class="jxr_string">"hbase.bucketcache.persistent.path"</span>, bucketCacheDataFile + <span class="jxr_string">".map"</span>);
+<a class="jxr_linenumber" name="137" href="#137">137</a>     <strong class="jxr_keyword">this</strong>.conf.setStrings(<span class="jxr_string">"hbase.bucketcache.bucket.sizes"</span>, Integer.toString(BUCKETSIZE));
+<a class="jxr_linenumber" name="138" href="#138">138</a>     <em class="jxr_comment">// This is minimum bucketcache size.... 1MB.</em>
+<a class="jxr_linenumber" name="139" href="#139">139</a>     <strong class="jxr_keyword">this</strong>.conf.setInt(<span class="jxr_string">"hbase.bucketcache.size"</span>, 1);
+<a class="jxr_linenumber" name="140" href="#140">140</a>     <em class="jxr_comment">// Write 8 entries which should make for four hfileBlocks.</em>
+<a class="jxr_linenumber" name="141" href="#141">141</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> count = 8;
+<a class="jxr_linenumber" name="142" href="#142">142</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> hfileBlockCount = 4;
+<a class="jxr_linenumber" name="143" href="#143">143</a>     Path hfilePath = <strong class="jxr_keyword">new</strong> Path(TEST_UTIL.getDataTestDir(), <strong class="jxr_keyword">this</strong>.name.getMethodName());
+<a class="jxr_linenumber" name="144" href="#144">144</a>     <em class="jxr_comment">// Clear out any existing global cache instance. Will pollute our tests below. Any concurrent</em>
+<a class="jxr_linenumber" name="145" href="#145">145</a>     <em class="jxr_comment">// running test will pollute our results below.</em>
+<a class="jxr_linenumber" name="146" href="#146">146</a>     CacheConfig.GLOBAL_BLOCK_CACHE_INSTANCE = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="147" href="#147">147</a>     CacheConfig cacheConfig = <strong class="jxr_keyword">new</strong> CacheConfig(conf);
+<a class="jxr_linenumber" name="148" href="#148">148</a>     List&lt;Cell&gt; writtenCells = writeFile(hfilePath, Compression.Algorithm.NONE, cacheConfig, count);
+<a class="jxr_linenumber" name="149" href="#149">149</a>     CacheStats stats = cacheConfig.getBlockCache().getStats();
+<a class="jxr_linenumber" name="150" href="#150">150</a>     List&lt;Cell&gt; readCells = readFile(hfilePath, cacheConfig);
+<a class="jxr_linenumber" name="151" href="#151">151</a>     assertTrue(!writtenCells.isEmpty());
+<a class="jxr_linenumber" name="152" href="#152">152</a>     assertEquals(writtenCells.size(), readCells.size());
+<a class="jxr_linenumber" name="153" href="#153">153</a>     assertEquals(hfileBlockCount, stats.getMissCount());
+<a class="jxr_linenumber" name="154" href="#154">154</a>     assertEquals(1, stats.getHitCount()); <em class="jxr_comment">// readFile will read first block is from cache.</em>
+<a class="jxr_linenumber" name="155" href="#155">155</a> 
+<a class="jxr_linenumber" name="156" href="#156">156</a>     <em class="jxr_comment">// Now, close out the cache and then reopen and verify that cache still has our blocks.</em>
+<a class="jxr_linenumber" name="157" href="#157">157</a>     <em class="jxr_comment">// Assert that persistence works.</em>
+<a class="jxr_linenumber" name="158" href="#158">158</a>     cacheConfig.getBlockCache().shutdown();
+<a class="jxr_linenumber" name="159" href="#159">159</a>     <em class="jxr_comment">// Need to clear the global cache else the new CacheConfig won't create a bucketcache but</em>
+<a class="jxr_linenumber" name="160" href="#160">160</a>     <em class="jxr_comment">// just reuse the old one.</em>
+<a class="jxr_linenumber" name="161" href="#161">161</a>     CacheConfig.GLOBAL_BLOCK_CACHE_INSTANCE = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="162" href="#162">162</a>     cacheConfig = <strong class="jxr_keyword">new</strong> CacheConfig(conf);
+<a class="jxr_linenumber" name="163" href="#163">163</a>     stats = cacheConfig.getBlockCache().getStats();
+<a class="jxr_linenumber" name="164" href="#164">164</a>     assertEquals(0, stats.getHitCachingCount());
+<a class="jxr_linenumber" name="165" href="#165">165</a>     readCells = readFile(hfilePath, cacheConfig);
+<a class="jxr_linenumber" name="166" href="#166">166</a>     <em class="jxr_comment">// readFile will read all hfileblocs in the file, hfileBlockCount, and then one more, so + 1.</em>
+<a class="jxr_linenumber" name="167" href="#167">167</a>     assertEquals(hfileBlockCount + 1, stats.getHitCachingCount());
+<a class="jxr_linenumber" name="168" href="#168">168</a>   }
+<a class="jxr_linenumber" name="169" href="#169">169</a> 
+<a class="jxr_linenumber" name="170" href="#170">170</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="171" href="#171">171</a> <em class="jxr_javadoccomment">   * Write a file with &lt;code&gt;count&lt;/code&gt; entries.</em>
+<a class="jxr_linenumber" name="172" href="#172">172</a> <em class="jxr_javadoccomment">   * @return The Cells written to the file.</em>
+<a class="jxr_linenumber" name="173" href="#173">173</a> <em class="jxr_javadoccomment">   * @throws IOException</em>
+<a class="jxr_linenumber" name="174" href="#174">174</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="175" href="#175">175</a>   <strong class="jxr_keyword">private</strong> List&lt;Cell&gt; writeFile(<strong class="jxr_keyword">final</strong> Path hfilePath, <strong class="jxr_keyword">final</strong> Compression.Algorithm compressAlgo,
+<a class="jxr_linenumber" name="176" href="#176">176</a>       <strong class="jxr_keyword">final</strong> CacheConfig cacheConfig, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> count)
+<a class="jxr_linenumber" name="177" href="#177">177</a>   <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="178" href="#178">178</a>     List&lt;Cell&gt; cells = <strong class="jxr_keyword">new</strong> ArrayList&lt;Cell&gt;(count);
+<a class="jxr_linenumber" name="179" href="#179">179</a>     HFileContext context =
+<a class="jxr_linenumber" name="180" href="#180">180</a>         <strong class="jxr_keyword">new</strong> HFileContextBuilder().withBlockSize(BLOCKSIZE).withCompression(compressAlgo).build();
+<a class="jxr_linenumber" name="181" href="#181">181</a>     <strong class="jxr_keyword">try</strong> (HFile.Writer writer = <strong class="jxr_keyword">new</strong> HFile.WriterFactory(conf, cacheConfig).
+<a class="jxr_linenumber" name="182" href="#182">182</a>         withPath(fs, hfilePath).
+<a class="jxr_linenumber" name="183" href="#183">183</a>         withFileContext(context).
+<a class="jxr_linenumber" name="184" href="#184">184</a>         withComparator(CellComparator.COMPARATOR).
+<a class="jxr_linenumber" name="185" href="#185">185</a>         create()) {
+<a class="jxr_linenumber" name="186" href="#186">186</a>       byte [] valueBytes = <strong class="jxr_keyword">new</strong> byte [VALUE_SIZE];
+<a class="jxr_linenumber" name="187" href="#187">187</a>       <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; valueBytes.length; i++) valueBytes[i] = '0';
+<a class="jxr_linenumber" name="188" href="#188">188</a>       <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; count; ++i) {
+<a class="jxr_linenumber" name="189" href="#189">189</a>         byte[] keyBytes = format(i);
+<a class="jxr_linenumber" name="190" href="#190">190</a>         KeyValue keyValue = <strong class="jxr_keyword">new</strong> KeyValue(keyBytes, HConstants.CATALOG_FAMILY, keyBytes,
+<a class="jxr_linenumber" name="191" href="#191">191</a>             HConstants.LATEST_TIMESTAMP, valueBytes);
+<a class="jxr_linenumber" name="192" href="#192">192</a>         writer.append(keyValue);
+<a class="jxr_linenumber" name="193" href="#193">193</a>         cells.add(keyValue);
+<a class="jxr_linenumber" name="194" href="#194">194</a>       }
+<a class="jxr_linenumber" name="195" href="#195">195</a>     }
+<a class="jxr_linenumber" name="196" href="#196">196</a>     <strong class="jxr_keyword">return</strong> cells;
+<a class="jxr_linenumber" name="197" href="#197">197</a>   }
+<a class="jxr_linenumber" name="198" href="#198">198</a> 
+<a class="jxr_linenumber" name="199" href="#199">199</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="200" href="#200">200</a> <em class="jxr_javadoccomment">   * Read the whole file, then read the first block so we get something from cache for sure.</em>
+<a class="jxr_linenumber" name="201" href="#201">201</a> <em class="jxr_javadoccomment">   * So... there are TOTAL_BLOCKS_IN_FILE read + 1. See math at head of this class.</em>
+<a class="jxr_linenumber" name="202" href="#202">202</a> <em class="jxr_javadoccomment">   * @return The Cells read from the file.</em>
+<a class="jxr_linenumber" name="203" href="#203">203</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="204" href="#204">204</a>   <strong class="jxr_keyword">private</strong> List&lt;Cell&gt; readFile(<strong class="jxr_keyword">final</strong> Path hfilePath, <strong class="jxr_keyword">final</strong> CacheConfig cacheConfig)
+<a class="jxr_linenumber" name="205" href="#205">205</a>   <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="206" href="#206">206</a>     List&lt;Cell&gt; cells = <strong class="jxr_keyword">new</strong> ArrayList&lt;Cell&gt;();
+<a class="jxr_linenumber" name="207" href="#207">207</a>     <strong class="jxr_keyword">try</strong> (HFile.Reader reader = HFile.createReader(<strong class="jxr_keyword">this</strong>.fs, hfilePath, cacheConfig, <strong class="jxr_keyword">this</strong>.conf);
+<a class="jxr_linenumber" name="208" href="#208">208</a>         HFileScanner scanner = reader.getScanner(<strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>)) {
+<a class="jxr_linenumber" name="209" href="#209">209</a>       scanner.seekTo();
+<a class="jxr_linenumber" name="210" href="#210">210</a>       <strong class="jxr_keyword">do</strong> {
+<a class="jxr_linenumber" name="211" href="#211">211</a>         cells.add(scanner.getCell());
+<a class="jxr_linenumber" name="212" href="#212">212</a>         LOG.info(scanner.getKey());
+<a class="jxr_linenumber" name="213" href="#213">213</a>       } <strong class="jxr_keyword">while</strong> (scanner.next());
+<a class="jxr_linenumber" name="214" href="#214">214</a>       <em class="jxr_comment">// Do a random seek just so we see a block coming from cache.</em>
+<a class="jxr_linenumber" name="215" href="#215">215</a>       scanner.seekTo(reader.getFirstKey());
+<a class="jxr_linenumber" name="216" href="#216">216</a>       scanner.next();
+<a class="jxr_linenumber" name="217" href="#217">217</a>       LOG.info(scanner.getCell());
+<a class="jxr_linenumber" name="218" href="#218">218</a>     }
+<a class="jxr_linenumber" name="219" href="#219">219</a>     <strong class="jxr_keyword">return</strong> cells;
+<a class="jxr_linenumber" name="220" href="#220">220</a>   }
+<a class="jxr_linenumber" name="221" href="#221">221</a> 
+<a class="jxr_linenumber" name="222" href="#222">222</a>   <em class="jxr_comment">/*</em>
+<a class="jxr_linenumber" name="223" href="#223">223</a> <em class="jxr_comment">   * Format passed integer.</em>
+<a class="jxr_linenumber" name="224" href="#224">224</a> <em class="jxr_comment">   * @param number</em>
+<a class="jxr_linenumber" name="225" href="#225">225</a> <em class="jxr_comment">   * @return Returns zero-prefixed ROW_LENGTH-byte wide decimal version of passed</em>
+<a class="jxr_linenumber" name="226" href="#226">226</a> <em class="jxr_comment">   * number (Does absolute in case number is negative).</em>
+<a class="jxr_linenumber" name="227" href="#227">227</a> <em class="jxr_comment">   */</em>
+<a class="jxr_linenumber" name="228" href="#228">228</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> byte [] format(<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> number) {
+<a class="jxr_linenumber" name="229" href="#229">229</a>     byte [] b = <strong class="jxr_keyword">new</strong> byte[ROW_LENGTH];
+<a class="jxr_linenumber" name="230" href="#230">230</a>     <strong class="jxr_keyword">int</strong> d = Math.abs(number);
+<a class="jxr_linenumber" name="231" href="#231">231</a>     <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = b.length - 1; i &gt;= 0; i--) {
+<a class="jxr_linenumber" name="232" href="#232">232</a>       b[i] = (byte)((d % 10) + '0');
+<a class="jxr_linenumber" name="233" href="#233">233</a>       d /= 10;
+<a class="jxr_linenumber" name="234" href="#234">234</a>     }
+<a class="jxr_linenumber" name="235" href="#235">235</a>     <strong class="jxr_keyword">return</strong> b;
+<a class="jxr_linenumber" name="236" href="#236">236</a>   }
+<a class="jxr_linenumber" name="237" href="#237">237</a> }
 </pre>
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