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<h1 title="Package" class="title">Package&nbsp;org.apache.hadoop.hdfs.server.namenode.snapshot</h1>
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<table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Interface Summary table, listing interfaces, and an explanation">
<caption><span>Interface Summary</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
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<tbody>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffList</a>&lt;T extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&gt;</td>
<td class="colLast">
<div class="block">This interface defines the methods used to store and manage InodeDiffs.</div>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotStatsMXBean.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">SnapshotStatsMXBean</a></td>
<td class="colLast">
<div class="block">This is an interface used to retrieve statistic information related to
snapshots</div>
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<caption><span>Class Summary</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
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<tbody>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffListByArrayList.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffListByArrayList</a>&lt;T extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&gt;</td>
<td class="colLast">
<div class="block">Resizable-array implementation of the DiffList interface.</div>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffListBySkipList.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffListBySkipList</a></td>
<td class="colLast">
<div class="block">SkipList is an implementation of a data structure for storing a sorted list
of Directory Diff elements, using a hierarchy of linked lists that connect
increasingly sparse subsequences(defined by skip interval here) of the diffs.</div>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DirectoryDiffListFactory.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">DirectoryDiffListFactory</a></td>
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<div class="block">For creating <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot"><code>DiffList</code></a> for <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DirectoryWithSnapshotFeature.DirectoryDiff.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot"><code>DirectoryWithSnapshotFeature.DirectoryDiff</code></a>.</div>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DirectoryWithSnapshotFeature.DirectoryDiff.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">DirectoryWithSnapshotFeature.DirectoryDiff</a></td>
<td class="colLast">
<div class="block">The difference of an <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeDirectory</code></a> between two snapshots.</div>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DirectoryWithSnapshotFeature.DirectoryDiffList.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">DirectoryWithSnapshotFeature.DirectoryDiffList</a></td>
<td class="colLast">
<div class="block">A list of directory diffs.</div>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/FileDiff.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">FileDiff</a></td>
<td class="colLast">
<div class="block">The difference of an <code>INodeFile</code> between two snapshots.</div>
</td>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/FileDiffList.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">FileDiffList</a></td>
<td class="colLast">
<div class="block">A list of FileDiffs for storing snapshot data.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/FSImageFormatPBSnapshot.Loader.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">FSImageFormatPBSnapshot.Loader</a></td>
<td class="colLast">
<div class="block">Loading snapshot related information from protobuf based FSImage</div>
</td>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/FSImageFormatPBSnapshot.Saver.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">FSImageFormatPBSnapshot.Saver</a></td>
<td class="colLast">
<div class="block">Saving snapshot related information to protobuf based FSImage</div>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/Snapshot.Root.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">Snapshot.Root</a></td>
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<div class="block">The root directory of the snapshot.</div>
</td>
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<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotFSImageFormat.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">SnapshotFSImageFormat</a></td>
<td class="colLast">
<div class="block">A helper class defining static methods for reading/writing snapshot related
information from/to FSImage.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotFSImageFormat.ReferenceMap.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">SnapshotFSImageFormat.ReferenceMap</a></td>
<td class="colLast">
<div class="block">A reference map for fsimage serialization.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotManager.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">SnapshotManager</a></td>
<td class="colLast">
<div class="block">Manage snapshottable directories and their snapshots.</div>
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