[09/51] [partial] hbase-site git commit: Published site at .

git-site-role Fri, 03 Nov 2017 08:17:39 -0700
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/7d38bdbb/devapidocs/src-html/org/apache/hadoop/hbase/fs/HFileSystem.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/fs/HFileSystem.html 
b/devapidocs/src-html/org/apache/hadoop/hbase/fs/HFileSystem.html
index 1553cc6..1daa9e8 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/fs/HFileSystem.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/fs/HFileSystem.html
@@ -73,434 +73,431 @@
 <span class="sourceLineNo">065</span>public class HFileSystem extends 
FilterFileSystem {<a name="line.65"></a>
 <span class="sourceLineNo">066</span>  public static final Log LOG = 
LogFactory.getLog(HFileSystem.class);<a name="line.66"></a>
 <span class="sourceLineNo">067</span><a name="line.67"></a>
-<span class="sourceLineNo">068</span>  /** Parameter name for HBase WAL 
directory */<a name="line.68"></a>
-<span class="sourceLineNo">069</span>  public static final String 
HBASE_WAL_DIR = "hbase.wal.dir";<a name="line.69"></a>
-<span class="sourceLineNo">070</span><a name="line.70"></a>
-<span class="sourceLineNo">071</span>  private final FileSystem noChecksumFs;  
 // read hfile data from storage<a name="line.71"></a>
-<span class="sourceLineNo">072</span>  private final boolean 
useHBaseChecksum;<a name="line.72"></a>
-<span class="sourceLineNo">073</span>  private static volatile byte 
unspecifiedStoragePolicyId = Byte.MIN_VALUE;<a name="line.73"></a>
-<span class="sourceLineNo">074</span><a name="line.74"></a>
-<span class="sourceLineNo">075</span>  /**<a name="line.75"></a>
-<span class="sourceLineNo">076</span>   * Create a FileSystem object for HBase 
regionservers.<a name="line.76"></a>
-<span class="sourceLineNo">077</span>   * @param conf The configuration to be 
used for the filesystem<a name="line.77"></a>
-<span class="sourceLineNo">078</span>   * @param useHBaseChecksum if true, 
then use<a name="line.78"></a>
-<span class="sourceLineNo">079</span>   *        checksum verfication in 
hbase, otherwise<a name="line.79"></a>
-<span class="sourceLineNo">080</span>   *        delegate checksum 
verification to the FileSystem.<a name="line.80"></a>
-<span class="sourceLineNo">081</span>   */<a name="line.81"></a>
-<span class="sourceLineNo">082</span>  public HFileSystem(Configuration conf, 
boolean useHBaseChecksum)<a name="line.82"></a>
-<span class="sourceLineNo">083</span>    throws IOException {<a 
name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span>    // Create the default filesystem with 
checksum verification switched on.<a name="line.85"></a>
-<span class="sourceLineNo">086</span>    // By default, any operation to this 
FilterFileSystem occurs on<a name="line.86"></a>
-<span class="sourceLineNo">087</span>    // the underlying filesystem that has 
checksums switched on.<a name="line.87"></a>
-<span class="sourceLineNo">088</span>    this.fs = FileSystem.get(conf);<a 
name="line.88"></a>
-<span class="sourceLineNo">089</span>    this.useHBaseChecksum = 
useHBaseChecksum;<a name="line.89"></a>
-<span class="sourceLineNo">090</span><a name="line.90"></a>
-<span class="sourceLineNo">091</span>    fs.initialize(getDefaultUri(conf), 
conf);<a name="line.91"></a>
-<span class="sourceLineNo">092</span>    <a name="line.92"></a>
-<span class="sourceLineNo">093</span>    // disable checksum verification for 
local fileSystem, see HBASE-11218<a name="line.93"></a>
-<span class="sourceLineNo">094</span>    if (fs instanceof LocalFileSystem) 
{<a name="line.94"></a>
-<span class="sourceLineNo">095</span>      fs.setWriteChecksum(false);<a 
name="line.95"></a>
-<span class="sourceLineNo">096</span>      fs.setVerifyChecksum(false);<a 
name="line.96"></a>
-<span class="sourceLineNo">097</span>    }<a name="line.97"></a>
-<span class="sourceLineNo">098</span><a name="line.98"></a>
-<span class="sourceLineNo">099</span>    addLocationsOrderInterceptor(conf);<a 
name="line.99"></a>
-<span class="sourceLineNo">100</span><a name="line.100"></a>
-<span class="sourceLineNo">101</span>    // If hbase checksum verification is 
switched on, then create a new<a name="line.101"></a>
-<span class="sourceLineNo">102</span>    // filesystem object that has cksum 
verification turned off.<a name="line.102"></a>
-<span class="sourceLineNo">103</span>    // We will avoid verifying checksums 
in the fs client, instead do it<a name="line.103"></a>
-<span class="sourceLineNo">104</span>    // inside of hbase.<a 
name="line.104"></a>
-<span class="sourceLineNo">105</span>    // If this is the local file system 
hadoop has a bug where seeks<a name="line.105"></a>
-<span class="sourceLineNo">106</span>    // do not go to the correct location 
if setVerifyChecksum(false) is called.<a name="line.106"></a>
-<span class="sourceLineNo">107</span>    // This manifests itself in that 
incorrect data is read and HFileBlocks won't be able to read<a 
name="line.107"></a>
-<span class="sourceLineNo">108</span>    // their header magic numbers. See 
HBASE-5885<a name="line.108"></a>
-<span class="sourceLineNo">109</span>    if (useHBaseChecksum &amp;&amp; !(fs 
instanceof LocalFileSystem)) {<a name="line.109"></a>
-<span class="sourceLineNo">110</span>      conf = new Configuration(conf);<a 
name="line.110"></a>
-<span class="sourceLineNo">111</span>      
conf.setBoolean("dfs.client.read.shortcircuit.skip.checksum", true);<a 
name="line.111"></a>
-<span class="sourceLineNo">112</span>      this.noChecksumFs = 
maybeWrapFileSystem(newInstanceFileSystem(conf), conf);<a name="line.112"></a>
-<span class="sourceLineNo">113</span>      
this.noChecksumFs.setVerifyChecksum(false);<a name="line.113"></a>
-<span class="sourceLineNo">114</span>    } else {<a name="line.114"></a>
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maybeWrapFileSystem(fs, conf);<a name="line.115"></a>
-<span class="sourceLineNo">116</span>    }<a name="line.116"></a>
+<span class="sourceLineNo">068</span>  private final FileSystem noChecksumFs;  
 // read hfile data from storage<a name="line.68"></a>
+<span class="sourceLineNo">069</span>  private final boolean 
useHBaseChecksum;<a name="line.69"></a>
+<span class="sourceLineNo">070</span>  private static volatile byte 
unspecifiedStoragePolicyId = Byte.MIN_VALUE;<a name="line.70"></a>
+<span class="sourceLineNo">071</span><a name="line.71"></a>
+<span class="sourceLineNo">072</span>  /**<a name="line.72"></a>
+<span class="sourceLineNo">073</span>   * Create a FileSystem object for HBase 
regionservers.<a name="line.73"></a>
+<span class="sourceLineNo">074</span>   * @param conf The configuration to be 
used for the filesystem<a name="line.74"></a>
+<span class="sourceLineNo">075</span>   * @param useHBaseChecksum if true, 
then use<a name="line.75"></a>
+<span class="sourceLineNo">076</span>   *        checksum verfication in 
hbase, otherwise<a name="line.76"></a>
+<span class="sourceLineNo">077</span>   *        delegate checksum 
verification to the FileSystem.<a name="line.77"></a>
+<span class="sourceLineNo">078</span>   */<a name="line.78"></a>
+<span class="sourceLineNo">079</span>  public HFileSystem(Configuration conf, 
boolean useHBaseChecksum)<a name="line.79"></a>
+<span class="sourceLineNo">080</span>    throws IOException {<a 
name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span>    // Create the default filesystem with 
checksum verification switched on.<a name="line.82"></a>
+<span class="sourceLineNo">083</span>    // By default, any operation to this 
FilterFileSystem occurs on<a name="line.83"></a>
+<span class="sourceLineNo">084</span>    // the underlying filesystem that has 
checksums switched on.<a name="line.84"></a>
+<span class="sourceLineNo">085</span>    this.fs = FileSystem.get(conf);<a 
name="line.85"></a>
+<span class="sourceLineNo">086</span>    this.useHBaseChecksum = 
useHBaseChecksum;<a name="line.86"></a>
+<span class="sourceLineNo">087</span><a name="line.87"></a>
+<span class="sourceLineNo">088</span>    fs.initialize(getDefaultUri(conf), 
conf);<a name="line.88"></a>
+<span class="sourceLineNo">089</span>    <a name="line.89"></a>
+<span class="sourceLineNo">090</span>    // disable checksum verification for 
local fileSystem, see HBASE-11218<a name="line.90"></a>
+<span class="sourceLineNo">091</span>    if (fs instanceof LocalFileSystem) 
{<a name="line.91"></a>
+<span class="sourceLineNo">092</span>      fs.setWriteChecksum(false);<a 
name="line.92"></a>
+<span class="sourceLineNo">093</span>      fs.setVerifyChecksum(false);<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>    addLocationsOrderInterceptor(conf);<a 
name="line.96"></a>
+<span class="sourceLineNo">097</span><a name="line.97"></a>
+<span class="sourceLineNo">098</span>    // If hbase checksum verification is 
switched on, then create a new<a name="line.98"></a>
+<span class="sourceLineNo">099</span>    // filesystem object that has cksum 
verification turned off.<a name="line.99"></a>
+<span class="sourceLineNo">100</span>    // We will avoid verifying checksums 
in the fs client, instead do it<a name="line.100"></a>
+<span class="sourceLineNo">101</span>    // inside of hbase.<a 
name="line.101"></a>
+<span class="sourceLineNo">102</span>    // If this is the local file system 
hadoop has a bug where seeks<a name="line.102"></a>
+<span class="sourceLineNo">103</span>    // do not go to the correct location 
if setVerifyChecksum(false) is called.<a name="line.103"></a>
+<span class="sourceLineNo">104</span>    // This manifests itself in that 
incorrect data is read and HFileBlocks won't be able to read<a 
name="line.104"></a>
+<span class="sourceLineNo">105</span>    // their header magic numbers. See 
HBASE-5885<a name="line.105"></a>
+<span class="sourceLineNo">106</span>    if (useHBaseChecksum &amp;&amp; !(fs 
instanceof LocalFileSystem)) {<a name="line.106"></a>
+<span class="sourceLineNo">107</span>      conf = new Configuration(conf);<a 
name="line.107"></a>
+<span class="sourceLineNo">108</span>      
conf.setBoolean("dfs.client.read.shortcircuit.skip.checksum", true);<a 
name="line.108"></a>
+<span class="sourceLineNo">109</span>      this.noChecksumFs = 
maybeWrapFileSystem(newInstanceFileSystem(conf), conf);<a name="line.109"></a>
+<span class="sourceLineNo">110</span>      
this.noChecksumFs.setVerifyChecksum(false);<a name="line.110"></a>
+<span class="sourceLineNo">111</span>    } else {<a name="line.111"></a>
+<span class="sourceLineNo">112</span>      this.noChecksumFs = 
maybeWrapFileSystem(fs, conf);<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>    this.fs = 
maybeWrapFileSystem(this.fs, conf);<a name="line.115"></a>
+<span class="sourceLineNo">116</span>  }<a name="line.116"></a>
 <span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span>    this.fs = 
maybeWrapFileSystem(this.fs, conf);<a name="line.118"></a>
-<span class="sourceLineNo">119</span>  }<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>   * Wrap a FileSystem object within a 
HFileSystem. The noChecksumFs and<a name="line.122"></a>
-<span class="sourceLineNo">123</span>   * writefs are both set to be the same 
specified fs. <a name="line.123"></a>
-<span class="sourceLineNo">124</span>   * Do not verify hbase-checksums while 
reading data from filesystem.<a name="line.124"></a>
-<span class="sourceLineNo">125</span>   * @param fs Set the noChecksumFs and 
writeFs to this specified filesystem.<a name="line.125"></a>
-<span class="sourceLineNo">126</span>   */<a name="line.126"></a>
-<span class="sourceLineNo">127</span>  public HFileSystem(FileSystem fs) {<a 
name="line.127"></a>
-<span class="sourceLineNo">128</span>    this.fs = fs;<a name="line.128"></a>
-<span class="sourceLineNo">129</span>    this.noChecksumFs = fs;<a 
name="line.129"></a>
-<span class="sourceLineNo">130</span>    this.useHBaseChecksum = false;<a 
name="line.130"></a>
-<span class="sourceLineNo">131</span>  }<a name="line.131"></a>
-<span class="sourceLineNo">132</span><a name="line.132"></a>
-<span class="sourceLineNo">133</span>  /**<a name="line.133"></a>
-<span class="sourceLineNo">134</span>   * Returns the filesystem that is 
specially setup for <a name="line.134"></a>
-<span class="sourceLineNo">135</span>   * doing reads from storage. This 
object avoids doing <a name="line.135"></a>
-<span class="sourceLineNo">136</span>   * checksum verifications for reads.<a 
name="line.136"></a>
-<span class="sourceLineNo">137</span>   * @return The FileSystem object that 
can be used to read data<a name="line.137"></a>
-<span class="sourceLineNo">138</span>   *         from files.<a 
name="line.138"></a>
-<span class="sourceLineNo">139</span>   */<a name="line.139"></a>
-<span class="sourceLineNo">140</span>  public FileSystem getNoChecksumFs() {<a 
name="line.140"></a>
-<span class="sourceLineNo">141</span>    return noChecksumFs;<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>  /**<a name="line.144"></a>
-<span class="sourceLineNo">145</span>   * Returns the underlying filesystem<a 
name="line.145"></a>
-<span class="sourceLineNo">146</span>   * @return The underlying FileSystem 
for this FilterFileSystem object.<a name="line.146"></a>
-<span class="sourceLineNo">147</span>   */<a name="line.147"></a>
-<span class="sourceLineNo">148</span>  public FileSystem getBackingFs() throws 
IOException {<a name="line.148"></a>
-<span class="sourceLineNo">149</span>    return fs;<a name="line.149"></a>
-<span class="sourceLineNo">150</span>  }<a name="line.150"></a>
-<span class="sourceLineNo">151</span><a name="line.151"></a>
-<span class="sourceLineNo">152</span>  /**<a name="line.152"></a>
-<span class="sourceLineNo">153</span>   * Set the source path (directory/file) 
to the specified storage policy.<a name="line.153"></a>
-<span class="sourceLineNo">154</span>   * @param path The source path 
(directory/file).<a name="line.154"></a>
-<span class="sourceLineNo">155</span>   * @param policyName The name of the 
storage policy: 'HOT', 'COLD', etc.<a name="line.155"></a>
-<span class="sourceLineNo">156</span>   * See see hadoop 2.6+ 
org.apache.hadoop.hdfs.protocol.HdfsConstants for possible list e.g<a 
name="line.156"></a>
-<span class="sourceLineNo">157</span>   * 'COLD', 'WARM', 'HOT', 'ONE_SSD', 
'ALL_SSD', 'LAZY_PERSIST'.<a name="line.157"></a>
-<span class="sourceLineNo">158</span>   */<a name="line.158"></a>
-<span class="sourceLineNo">159</span>  public void setStoragePolicy(Path path, 
String policyName) {<a name="line.159"></a>
-<span class="sourceLineNo">160</span>    FSUtils.setStoragePolicy(this.fs, 
path, policyName);<a name="line.160"></a>
-<span class="sourceLineNo">161</span>  }<a name="line.161"></a>
-<span class="sourceLineNo">162</span><a name="line.162"></a>
-<span class="sourceLineNo">163</span>  /**<a name="line.163"></a>
-<span class="sourceLineNo">164</span>   * Get the storage policy of the source 
path (directory/file).<a name="line.164"></a>
-<span class="sourceLineNo">165</span>   * @param path The source path 
(directory/file).<a name="line.165"></a>
-<span class="sourceLineNo">166</span>   * @return Storage policy name, or 
{@code null} if not using {@link DistributedFileSystem} or<a 
name="line.166"></a>
-<span class="sourceLineNo">167</span>   *         exception thrown when trying 
to get policy<a name="line.167"></a>
-<span class="sourceLineNo">168</span>   */<a name="line.168"></a>
-<span class="sourceLineNo">169</span>  @Nullable<a name="line.169"></a>
-<span class="sourceLineNo">170</span>  public String getStoragePolicyName(Path 
path) {<a name="line.170"></a>
-<span class="sourceLineNo">171</span>    try {<a name="line.171"></a>
-<span class="sourceLineNo">172</span>      Object blockStoragePolicySpi =<a 
name="line.172"></a>
-<span class="sourceLineNo">173</span>          
ReflectionUtils.invokeMethod(this.fs, "getStoragePolicy", path);<a 
name="line.173"></a>
-<span class="sourceLineNo">174</span>      return (String) 
ReflectionUtils.invokeMethod(blockStoragePolicySpi, "getName");<a 
name="line.174"></a>
-<span class="sourceLineNo">175</span>    } catch (Exception e) {<a 
name="line.175"></a>
-<span class="sourceLineNo">176</span>      // Maybe fail because of using old 
HDFS version, try the old way<a name="line.176"></a>
-<span class="sourceLineNo">177</span>      if (LOG.isTraceEnabled()) {<a 
name="line.177"></a>
-<span class="sourceLineNo">178</span>        LOG.trace("Failed to get policy 
directly", e);<a name="line.178"></a>
-<span class="sourceLineNo">179</span>      }<a name="line.179"></a>
-<span class="sourceLineNo">180</span>      return 
getStoragePolicyForOldHDFSVersion(path);<a name="line.180"></a>
-<span class="sourceLineNo">181</span>    }<a name="line.181"></a>
-<span class="sourceLineNo">182</span>  }<a name="line.182"></a>
-<span class="sourceLineNo">183</span><a name="line.183"></a>
-<span class="sourceLineNo">184</span>  /**<a name="line.184"></a>
-<span class="sourceLineNo">185</span>   * Before Hadoop 2.8.0, there's no 
getStoragePolicy method for FileSystem interface, and we need<a 
name="line.185"></a>
-<span class="sourceLineNo">186</span>   * to keep compatible with it. See 
HADOOP-12161 for more details.<a name="line.186"></a>
-<span class="sourceLineNo">187</span>   * @param path Path to get storage 
policy against<a name="line.187"></a>
-<span class="sourceLineNo">188</span>   * @return the storage policy name<a 
name="line.188"></a>
-<span class="sourceLineNo">189</span>   */<a name="line.189"></a>
-<span class="sourceLineNo">190</span>  private String 
getStoragePolicyForOldHDFSVersion(Path path) {<a name="line.190"></a>
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-<span class="sourceLineNo">192</span>      if (this.fs instanceof 
DistributedFileSystem) {<a name="line.192"></a>
-<span class="sourceLineNo">193</span>        DistributedFileSystem dfs = 
(DistributedFileSystem) this.fs;<a name="line.193"></a>
-<span class="sourceLineNo">194</span>        HdfsFileStatus status = 
dfs.getClient().getFileInfo(path.toUri().getPath());<a name="line.194"></a>
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name="line.195"></a>
-<span class="sourceLineNo">196</span>          if (unspecifiedStoragePolicyId 
&lt; 0) {<a name="line.196"></a>
-<span class="sourceLineNo">197</span>            // Get the unspecified id 
field through reflection to avoid compilation error.<a name="line.197"></a>
-<span class="sourceLineNo">198</span>            // In later version 
BlockStoragePolicySuite#ID_UNSPECIFIED is moved to<a name="line.198"></a>
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HdfsConstants#BLOCK_STORAGE_POLICY_ID_UNSPECIFIED<a name="line.199"></a>
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BlockStoragePolicySuite.class.getField("ID_UNSPECIFIED");<a name="line.200"></a>
-<span class="sourceLineNo">201</span>            unspecifiedStoragePolicyId = 
idUnspecified.getByte(BlockStoragePolicySuite.class);<a name="line.201"></a>
-<span class="sourceLineNo">202</span>          }<a name="line.202"></a>
-<span class="sourceLineNo">203</span>          byte storagePolicyId = 
status.getStoragePolicy();<a name="line.203"></a>
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unspecifiedStoragePolicyId) {<a name="line.204"></a>
-<span class="sourceLineNo">205</span>            BlockStoragePolicy[] policies 
= dfs.getStoragePolicies();<a name="line.205"></a>
-<span class="sourceLineNo">206</span>            for (BlockStoragePolicy 
policy : policies) {<a name="line.206"></a>
-<span class="sourceLineNo">207</span>              if (policy.getId() == 
storagePolicyId) {<a name="line.207"></a>
-<span class="sourceLineNo">208</span>                return 
policy.getName();<a name="line.208"></a>
-<span class="sourceLineNo">209</span>              }<a name="line.209"></a>
-<span class="sourceLineNo">210</span>            }<a name="line.210"></a>
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-<span class="sourceLineNo">212</span>        }<a name="line.212"></a>
-<span class="sourceLineNo">213</span>      }<a name="line.213"></a>
-<span class="sourceLineNo">214</span>    } catch (Throwable e) {<a 
name="line.214"></a>
-<span class="sourceLineNo">215</span>      LOG.warn("failed to get block 
storage policy of [" + path + "]", e);<a name="line.215"></a>
-<span class="sourceLineNo">216</span>    }<a name="line.216"></a>
+<span class="sourceLineNo">118</span>  /**<a name="line.118"></a>
+<span class="sourceLineNo">119</span>   * Wrap a FileSystem object within a 
HFileSystem. The noChecksumFs and<a name="line.119"></a>
+<span class="sourceLineNo">120</span>   * writefs are both set to be the same 
specified fs. <a name="line.120"></a>
+<span class="sourceLineNo">121</span>   * Do not verify hbase-checksums while 
reading data from filesystem.<a name="line.121"></a>
+<span class="sourceLineNo">122</span>   * @param fs Set the noChecksumFs and 
writeFs to this specified filesystem.<a name="line.122"></a>
+<span class="sourceLineNo">123</span>   */<a name="line.123"></a>
+<span class="sourceLineNo">124</span>  public HFileSystem(FileSystem fs) {<a 
name="line.124"></a>
+<span class="sourceLineNo">125</span>    this.fs = fs;<a name="line.125"></a>
+<span class="sourceLineNo">126</span>    this.noChecksumFs = fs;<a 
name="line.126"></a>
+<span class="sourceLineNo">127</span>    this.useHBaseChecksum = false;<a 
name="line.127"></a>
+<span class="sourceLineNo">128</span>  }<a name="line.128"></a>
+<span class="sourceLineNo">129</span><a name="line.129"></a>
+<span class="sourceLineNo">130</span>  /**<a name="line.130"></a>
+<span class="sourceLineNo">131</span>   * Returns the filesystem that is 
specially setup for <a name="line.131"></a>
+<span class="sourceLineNo">132</span>   * doing reads from storage. This 
object avoids doing <a name="line.132"></a>
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+<span class="sourceLineNo">442</span><a name="line.442"></a>
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dnis[i];<a name="line.451"></a>
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overwrite, bufferSize, replication,<a name="line.489"></a>
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+<span class="sourceLineNo">492</span>}<a name="line.492"></a>
[09/51] [partial] hbase-site git commit: Published site at .

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