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<h1 title="Uses of Package org.apache.hadoop.fs" class="title">Uses of Package<br>org.apache.hadoop.fs</h1>
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<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing packages, and an explanation">
<caption><span>Packages that use <a href="../../../../org/apache/hadoop/fs/package-summary.html">org.apache.hadoop.fs</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Package</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.conf">org.apache.hadoop.conf</a></td>
<td class="colLast">
<div class="block">Configuration of system parameters.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.filecache">org.apache.hadoop.filecache</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs">org.apache.hadoop.fs</a></td>
<td class="colLast">
<div class="block">Implementations of <a href="../../../../org/apache/hadoop/fs/AbstractFileSystem.html" title="class in org.apache.hadoop.fs"><code>AbstractFileSystem</code></a> for hdfs
over rpc and hdfs over web.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.adl">org.apache.hadoop.fs.adl</a></td>
<td class="colLast">
<div class="block">Supporting classes for metrics instrumentation.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.azure">org.apache.hadoop.fs.azure</a></td>
<td class="colLast">
<div class="block">
A distributed implementation of <a href="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><code>FileSystem</code></a> for reading and writing files on
<a href="http://store.azure.com">Azure Block Storage</a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.azurebfs">org.apache.hadoop.fs.azurebfs</a></td>
<td class="colLast">
<div class="block">
A distributed implementation of <a href="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><code>FileSystem</code></a> for reading and writing files on
<a href="http://store.azure.com">Azure Storage</a>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.ftp">org.apache.hadoop.fs.ftp</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.impl">org.apache.hadoop.fs.impl</a></td>
<td class="colLast">
<div class="block">This package contains implementation classes for use inside
filesystems.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.s3a">org.apache.hadoop.fs.s3a</a></td>
<td class="colLast">
<div class="block">S3A Filesystem.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.s3a.commit.magic">org.apache.hadoop.fs.s3a.commit.magic</a></td>
<td class="colLast">
<div class="block">This is the "Magic" committer and support.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.s3native">org.apache.hadoop.fs.s3native</a></td>
<td class="colLast">
<div class="block">
A distributed implementation of <a href="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><code>FileSystem</code></a> for reading and writing files on
<a href="http://aws.amazon.com/s3">Amazon S3</a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.viewfs">org.apache.hadoop.fs.viewfs</a></td>
<td class="colLast">
<div class="block">ViewFileSystem and ViewFileSystemOverloadScheme classes.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.hdfs.client">org.apache.hadoop.hdfs.client</a></td>
<td class="colLast">
<div class="block">This package provides the administrative APIs for HDFS.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.hdfs.protocol">org.apache.hadoop.hdfs.protocol</a></td>
<td class="colLast">
<div class="block">Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.hdfs.server.common">org.apache.hadoop.hdfs.server.common</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.hdfs.server.common.blockaliasmap.impl">org.apache.hadoop.hdfs.server.common.blockaliasmap.impl</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.hdfs.server.namenode">org.apache.hadoop.hdfs.server.namenode</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.io">org.apache.hadoop.io</a></td>
<td class="colLast">
<div class="block">Generic i/o code for use when reading and writing data to the network,
to databases, and to files.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.io.compress">org.apache.hadoop.io.compress</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapred">org.apache.hadoop.mapred</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapred.lib">org.apache.hadoop.mapred.lib</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapred.lib.db">org.apache.hadoop.mapred.lib.db</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapreduce">org.apache.hadoop.mapreduce</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.input">org.apache.hadoop.mapreduce.lib.input</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.join">org.apache.hadoop.mapreduce.lib.join</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.output">org.apache.hadoop.mapreduce.lib.output</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.partition">org.apache.hadoop.mapreduce.lib.partition</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapreduce.security">org.apache.hadoop.mapreduce.security</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapreduce.v2.hs">org.apache.hadoop.mapreduce.v2.hs</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.metrics2.sink">org.apache.hadoop.metrics2.sink</a></td>
<td class="colLast">
<div class="block">Builtin metrics sinks</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.registry.client.api">org.apache.hadoop.registry.client.api</a></td>
<td class="colLast">
<div class="block">YARN Registry Client API.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.security">org.apache.hadoop.security</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.tools">org.apache.hadoop.tools</a></td>
<td class="colLast">
<div class="block">Command-line tools for MapReduce.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.yarn.api.records">org.apache.hadoop.yarn.api.records</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.yarn.client.api">org.apache.hadoop.yarn.client.api</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.yarn.logaggregation">org.apache.hadoop.yarn.logaggregation</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.yarn.logaggregation.filecontroller">org.apache.hadoop.yarn.logaggregation.filecontroller</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.yarn.service.client">org.apache.hadoop.yarn.service.client</a></td>
<td class="colLast">
<div class="block">Package org.apache.hadoop.yarn.service.client contains classes
for YARN Services Client API.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.yarn.util">org.apache.hadoop.yarn.util</a></td>
<td class="colLast">&nbsp;</td>
</tr>
</tbody>
</table>
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<caption><span>Classes in <a href="../../../../org/apache/hadoop/fs/package-summary.html">org.apache.hadoop.fs</a> used by <a href="../../../../org/apache/hadoop/conf/package-summary.html">org.apache.hadoop.conf</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colOne" scope="col">Class and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/Path.html#org.apache.hadoop.conf">Path</a>
<div class="block">Names a file or directory in a <a href="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><code>FileSystem</code></a>.</div>
</td>
</tr>
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<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing classes, and an explanation">
<caption><span>Classes in <a href="../../../../org/apache/hadoop/fs/package-summary.html">org.apache.hadoop.fs</a> used by <a href="../../../../org/apache/hadoop/filecache/package-summary.html">org.apache.hadoop.filecache</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colOne" scope="col">Class and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FileStatus.html#org.apache.hadoop.filecache">FileStatus</a>
<div class="block">Interface that represents the client side information for a file.</div>
</td>
</tr>
</tbody>
</table>
</li>
<li class="blockList"><a name="org.apache.hadoop.fs">
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<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing classes, and an explanation">
<caption><span>Classes in <a href="../../../../org/apache/hadoop/fs/package-summary.html">org.apache.hadoop.fs</a> used by <a href="../../../../org/apache/hadoop/fs/package-summary.html">org.apache.hadoop.fs</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colOne" scope="col">Class and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/Abortable.html#org.apache.hadoop.fs">Abortable</a>
<div class="block">Abort data being written to a stream, so that close() does
not write the data.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/AbstractFileSystem.html#org.apache.hadoop.fs">AbstractFileSystem</a>
<div class="block">This class provides an interface for implementors of a Hadoop file system
(analogous to the VFS of Unix).</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/BlockLocation.html#org.apache.hadoop.fs">BlockLocation</a>
<div class="block">Represents the network location of a block, information about the hosts
that contain block replicas, and other block metadata (E.g.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/BlockStoragePolicySpi.html#org.apache.hadoop.fs">BlockStoragePolicySpi</a>
<div class="block">A storage policy specifies the placement of block replicas on specific
storage types.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/ByteBufferPositionedReadable.html#org.apache.hadoop.fs">ByteBufferPositionedReadable</a>
<div class="block">Implementers of this interface provide a positioned read API that writes to a
<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio"><code>ByteBuffer</code></a> rather than a <code>byte[]</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/ByteBufferReadable.html#org.apache.hadoop.fs">ByteBufferReadable</a>
<div class="block">Implementers of this interface provide a read API that writes to a
ByteBuffer, not a byte[].</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/CacheFlag.html#org.apache.hadoop.fs">CacheFlag</a>
<div class="block">Specifies semantics for CacheDirective operations.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/CanSetDropBehind.html#org.apache.hadoop.fs">CanSetDropBehind</a>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/CanSetReadahead.html#org.apache.hadoop.fs">CanSetReadahead</a>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/CanUnbuffer.html#org.apache.hadoop.fs">CanUnbuffer</a>
<div class="block">FSDataInputStreams implement this interface to indicate that they can clear
their buffers on request.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/ChecksumFileSystem.html#org.apache.hadoop.fs">ChecksumFileSystem</a>
<div class="block">Abstract Checksumed FileSystem.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/ContentSummary.html#org.apache.hadoop.fs">ContentSummary</a>
<div class="block">Store the summary of a content (a directory or a file).</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/CreateFlag.html#org.apache.hadoop.fs">CreateFlag</a>
<div class="block">CreateFlag specifies the file create semantic.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FileAlreadyExistsException.html#org.apache.hadoop.fs">FileAlreadyExistsException</a>
<div class="block">Used when target file already exists for any operation and
is not configured to be overwritten.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FileChecksum.html#org.apache.hadoop.fs">FileChecksum</a>
<div class="block">An abstract class representing file checksums for files.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FileContext.html#org.apache.hadoop.fs">FileContext</a>
<div class="block">The FileContext class provides an interface for users of the Hadoop
file system.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FileStatus.html#org.apache.hadoop.fs">FileStatus</a>
<div class="block">Interface that represents the client side information for a file.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FileSystem.html#org.apache.hadoop.fs">FileSystem</a>
<div class="block">An abstract base class for a fairly generic filesystem.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FilterFileSystem.html#org.apache.hadoop.fs">FilterFileSystem</a>
<div class="block">A <code>FilterFileSystem</code> contains
some other file system, which it uses as
its basic file system, possibly transforming
the data along the way or providing additional
functionality.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FSBuilder.html#org.apache.hadoop.fs">FSBuilder</a>
<div class="block">The base interface which various FileSystem FileContext Builder
interfaces can extend, and which underlying implementations
will then implement.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FSDataInputStream.html#org.apache.hadoop.fs">FSDataInputStream</a>
<div class="block">Utility that wraps a <a href="../../../../org/apache/hadoop/fs/FSInputStream.html" title="class in org.apache.hadoop.fs"><code>FSInputStream</code></a> in a <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true" title="class or interface in java.io"><code>DataInputStream</code></a>
and buffers input through a <a href="https://docs.oracle.com/javase/8/docs/api/java/io/BufferedInputStream.html?is-external=true" title="class or interface in java.io"><code>BufferedInputStream</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FSDataOutputStream.html#org.apache.hadoop.fs">FSDataOutputStream</a>
<div class="block">Utility that wraps a <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io"><code>OutputStream</code></a> in a <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true" title="class or interface in java.io"><code>DataOutputStream</code></a>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FSDataOutputStreamBuilder.html#org.apache.hadoop.fs">FSDataOutputStreamBuilder</a>
<div class="block">Builder for <a href="../../../../org/apache/hadoop/fs/FSDataOutputStream.html" title="class in org.apache.hadoop.fs"><code>FSDataOutputStream</code></a> and its subclasses.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FsServerDefaults.html#org.apache.hadoop.fs">FsServerDefaults</a>
<div class="block">Provides server default configuration values to clients.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FsStatus.html#org.apache.hadoop.fs">FsStatus</a>
<div class="block">This class is used to represent the capacity, free and used space on a
<a href="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><code>FileSystem</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/FutureDataInputStreamBuilder.html#org.apache.hadoop.fs">FutureDataInputStreamBuilder</a>
<div class="block">Builder for input streams and subclasses whose return value is
actually a completable future: this allows for better asynchronous
operation.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/GlobalStorageStatistics.html#org.apache.hadoop.fs">GlobalStorageStatistics</a>
<div class="block">Stores global storage statistics objects.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/LocalFileSystem.html#org.apache.hadoop.fs">LocalFileSystem</a>
<div class="block">Implement the FileSystem API for the checksumed local filesystem.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/fs/class-use/LocatedFileStatus.html#org.apache.hadoop.fs">LocatedFileStatus</a>
<div class="block">This class defines a FileStatus that includes a file's block locations.</div>
</td>
</tr>
<tr class="rowColor">
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