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| <div class="subTitle">org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer</div> |
| <h2 title="Class LocalCacheDirectoryManager" class="title">Class LocalCacheDirectoryManager</h2> |
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| <li>org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.LocalCacheDirectoryManager</li> |
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| <pre>public class <span class="typeNameLabel">LocalCacheDirectoryManager</span> |
| 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> |
| <div class="block"><a href="../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/LocalCacheDirectoryManager.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer"><code>LocalCacheDirectoryManager</code></a> is used for managing hierarchical |
| directories for local cache. It will allow to restrict the number of files in |
| a directory to |
| <code>YarnConfiguration.NM_LOCAL_CACHE_MAX_FILES_PER_DIRECTORY</code> which |
| includes 36 sub-directories (named from 0 to 9 and a to z). Root directory is |
| represented by an empty string. It internally maintains a vacant directory |
| queue. As soon as the file count for the directory reaches its limit; new |
| files will not be created in it until at least one file is deleted from it. |
| New sub directories are not created unless a |
| <a href="../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/LocalCacheDirectoryManager.html#getRelativePathForLocalization--"><code>getRelativePathForLocalization()</code></a> request |
| is made and nonFullDirectories are empty. |
| |
| Note : this structure only returns relative localization path but doesn't |
| create one on disk.</div> |
| </li> |
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| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/LocalCacheDirectoryManager.html#DIRECTORIES_PER_LEVEL">DIRECTORIES_PER_LEVEL</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/LocalCacheDirectoryManager.html#LocalCacheDirectoryManager-org.apache.hadoop.conf.Configuration-">LocalCacheDirectoryManager</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/LocalCacheDirectoryManager.html#decrementFileCountForPath-java.lang.String-">decrementFileCountForPath</a></span>(<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> relPath)</code> |
| <div class="block">This method will reduce the file count for the directory represented by |
| path.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/LocalCacheDirectoryManager.html#getCacheDirectoryRoot-org.apache.hadoop.fs.Path-">getCacheDirectoryRoot</a></span>(org.apache.hadoop.fs.Path path)</code> |
| <div class="block">Given a path to a directory within a local cache tree return the |
| root of the cache directory.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/LocalCacheDirectoryManager.html#getRelativePathForLocalization--">getRelativePathForLocalization</a></span>()</code> |
| <div class="block">This method will return relative path from the first available vacant |
| directory.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/LocalCacheDirectoryManager.html#incrementFileCountForPath-java.lang.String-">incrementFileCountForPath</a></span>(<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> relPath)</code> |
| <div class="block">Increment the file count for a relative directory within the cache</div> |
| </td> |
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| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
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| <h4>DIRECTORIES_PER_LEVEL</h4> |
| <pre>public static final int DIRECTORIES_PER_LEVEL</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../../../constant-values.html#org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.LocalCacheDirectoryManager.DIRECTORIES_PER_LEVEL">Constant Field Values</a></dd> |
| </dl> |
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| <h3>Constructor Detail</h3> |
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| <h4>LocalCacheDirectoryManager</h4> |
| <pre>public LocalCacheDirectoryManager(org.apache.hadoop.conf.Configuration conf)</pre> |
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| <a name="getRelativePathForLocalization--"> |
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| <h4>getRelativePathForLocalization</h4> |
| <pre>public <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> getRelativePathForLocalization()</pre> |
| <div class="block">This method will return relative path from the first available vacant |
| directory.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang"><code>String</code></a> relative path for localization</dd> |
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| <h4>decrementFileCountForPath</h4> |
| <pre>public void decrementFileCountForPath(<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> relPath)</pre> |
| <div class="block">This method will reduce the file count for the directory represented by |
| path. The root directory of this Local cache directory manager is |
| represented by an empty string.</div> |
| </li> |
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| <h4>incrementFileCountForPath</h4> |
| <pre>public void incrementFileCountForPath(<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> relPath)</pre> |
| <div class="block">Increment the file count for a relative directory within the cache</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>relPath</code> - the relative path</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getCacheDirectoryRoot-org.apache.hadoop.fs.Path-"> |
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| <h4>getCacheDirectoryRoot</h4> |
| <pre>public static org.apache.hadoop.fs.Path getCacheDirectoryRoot(org.apache.hadoop.fs.Path path)</pre> |
| <div class="block">Given a path to a directory within a local cache tree return the |
| root of the cache directory.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>path</code> - the directory within a cache directory</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the local cache directory root or null if not found</dd> |
| </dl> |
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