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<h2 title="Class ErasureCodingUtils" class="title">Class ErasureCodingUtils</h2>
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<pre>@InterfaceAudience.Private
public final class <a href="../../../../../src-html/org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#line.41">ErasureCodingUtils</a>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
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<td class="colFirst"><code>private static org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#LOG">LOG</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#ErasureCodingUtils--">ErasureCodingUtils</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>private static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#checkAvailable-org.apache.hadoop.hdfs.DistributedFileSystem-java.lang.String-">checkAvailable</a></span>(org.apache.hadoop.hdfs.DistributedFileSystem&nbsp;dfs,
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<td class="colFirst"><code>private static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#createTempDir-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-">createTempDir</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
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<td class="colFirst"><code>private static org.apache.hadoop.hdfs.DistributedFileSystem</code></td>
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<td class="colFirst"><code>private static org.apache.hadoop.hdfs.DistributedFileSystem</code></td>
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<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#needsSync-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.TableDescriptor-">needsSync</a></span>(<a href="../../../../../org/apache/hadoop/hbase/client/TableDescriptor.html" title="interface in org.apache.hadoop.hbase.client">TableDescriptor</a>&nbsp;oldDescriptor,
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<div class="block">Check if EC policy is different between two descriptors</div>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#setPolicy-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-java.lang.String-">setPolicy</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
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<div class="block">Sets the EC policy on the path</div>
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<td class="colFirst"><code>static void</code></td>
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<div class="block">Sets the EC policy on the table directory for the specified table</div>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#sync-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.hbase.client.TableDescriptor-">sync</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
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<div class="block">Sync the EC policy state from the newDescriptor onto the FS for the table dir of the provided
table descriptor.</div>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#unsetPolicy-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.hbase.TableName-">unsetPolicy</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
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<div class="block">Unsets any EC policy specified on the path.</div>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#verifySupport-org.apache.hadoop.conf.Configuration-java.lang.String-">verifySupport</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
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<div class="block">Runs checks against the FileSystem, verifying that HDFS is supported and the policy is
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<pre>private static final&nbsp;org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#line.46">LOG</a></pre>
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<pre>private&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#line.43">ErasureCodingUtils</a>()</pre>
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<div class="block">Runs checks against the FileSystem, verifying that HDFS is supported and the policy is
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<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></code></dd>
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<div class="block">Check if EC policy is different between two descriptors</div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<pre>public static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#line.126">sync</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
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<div class="block">Sync the EC policy state from the newDescriptor onto the FS for the table dir of the provided
table descriptor. If the policy is null, we will remove erasure coding from the FS for the
table dir. If it's non-null, we'll set it to that policy.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>newDescriptor</code> - descriptor containing the policy and table name</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<div class="block">Sets the EC policy on the table directory for the specified table</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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org.apache.hadoop.fs.Path&nbsp;path,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;policy)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Sets the EC policy on the path</div>
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<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<h4>unsetPolicy</h4>
<pre>public static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#line.155">unsetPolicy</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;rootDir,
<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Unsets any EC policy specified on the path.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<h4>getDfs</h4>
<pre>private static&nbsp;org.apache.hadoop.hdfs.DistributedFileSystem&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#line.166">getDfs</a>(org.apache.hadoop.conf.Configuration&nbsp;conf)
throws <a href="../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></pre>
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<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></code></dd>
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<h4>getDfs</h4>
<pre>private static&nbsp;org.apache.hadoop.hdfs.DistributedFileSystem&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/fs/ErasureCodingUtils.html#line.177">getDfs</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs)
throws <a href="../../../../../org/apache/hadoop/hbase/DoNotRetryIOException.html" title="class in org.apache.hadoop.hbase">DoNotRetryIOException</a></pre>
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<dd><code><a href="../../../../../org/apache/hadoop/hbase/DoNotRetryIOException.html" title="class in org.apache.hadoop.hbase">DoNotRetryIOException</a></code></dd>
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