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| <h1 title="Package" class="title">Package org.apache.hadoop.hdfs.server.datanode.fsdataset</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"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Interface</th> |
| <th class="colLast" scope="col">Description</th> |
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| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/FsVolumeReference.html" title="interface in org.apache.hadoop.hdfs.server.datanode.fsdataset">FsVolumeReference</a></td> |
| <td class="colLast"> |
| <div class="block">This holds volume reference count as AutoClosable resource.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/FsVolumeSpi.html" title="interface in org.apache.hadoop.hdfs.server.datanode.fsdataset">FsVolumeSpi</a></td> |
| <td class="colLast"> |
| <div class="block">This is an interface for the underlying volume.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/FsVolumeSpi.BlockIterator.html" title="interface in org.apache.hadoop.hdfs.server.datanode.fsdataset">FsVolumeSpi.BlockIterator</a></td> |
| <td class="colLast"> |
| <div class="block">BlockIterator will return ExtendedBlock entries from a block pool in |
| this volume.</div> |
| </td> |
| </tr> |
| </tbody> |
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| </li> |
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| <tr> |
| <th class="colFirst" scope="col">Class</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/AvailableSpaceVolumeChoosingPolicy.html" title="class in org.apache.hadoop.hdfs.server.datanode.fsdataset">AvailableSpaceVolumeChoosingPolicy</a><V extends <a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/FsVolumeSpi.html" title="interface in org.apache.hadoop.hdfs.server.datanode.fsdataset">FsVolumeSpi</a>></td> |
| <td class="colLast"> |
| <div class="block">A DN volume choosing policy which takes into account the amount of free |
| space on each of the available volumes when considering where to assign a |
| new replica allocation.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/FsDatasetSpi.Factory.html" title="class in org.apache.hadoop.hdfs.server.datanode.fsdataset">FsDatasetSpi.Factory</a><D extends org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi<?>></td> |
| <td class="colLast"> |
| <div class="block">A factory for creating <code>FsDatasetSpi</code> objects.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/FsDatasetSpi.FsVolumeReferences.html" title="class in org.apache.hadoop.hdfs.server.datanode.fsdataset">FsDatasetSpi.FsVolumeReferences</a></td> |
| <td class="colLast"> |
| <div class="block">It behaviors as an unmodifiable list of FsVolume.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/FsVolumeSpi.ScanInfo.html" title="class in org.apache.hadoop.hdfs.server.datanode.fsdataset">FsVolumeSpi.ScanInfo</a></td> |
| <td class="colLast"> |
| <div class="block">Tracks the files and other information related to a block on the disk |
| Missing file is indicated by setting the corresponding member |
| to null.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/FsVolumeSpi.VolumeCheckContext.html" title="class in org.apache.hadoop.hdfs.server.datanode.fsdataset">FsVolumeSpi.VolumeCheckContext</a></td> |
| <td class="colLast"> |
| <div class="block">Context for the <code>Checkable.check(K)</code> call.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/LengthInputStream.html" title="class in org.apache.hadoop.hdfs.server.datanode.fsdataset">LengthInputStream</a></td> |
| <td class="colLast"> |
| <div class="block">An input stream with length.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/ReplicaInputStreams.html" title="class in org.apache.hadoop.hdfs.server.datanode.fsdataset">ReplicaInputStreams</a></td> |
| <td class="colLast"> |
| <div class="block">Contains the input streams for the data and checksum of a replica.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/ReplicaOutputStreams.html" title="class in org.apache.hadoop.hdfs.server.datanode.fsdataset">ReplicaOutputStreams</a></td> |
| <td class="colLast"> |
| <div class="block">Contains the output streams for the data and checksum of a replica.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/RoundRobinVolumeChoosingPolicy.html" title="class in org.apache.hadoop.hdfs.server.datanode.fsdataset">RoundRobinVolumeChoosingPolicy</a><V extends <a href="../../../../../../../org/apache/hadoop/hdfs/server/datanode/fsdataset/FsVolumeSpi.html" title="interface in org.apache.hadoop.hdfs.server.datanode.fsdataset">FsVolumeSpi</a>></td> |
| <td class="colLast"> |
| <div class="block">Choose volumes with the same storage type in round-robin order.</div> |
| </td> |
| </tr> |
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