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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.hadoop.hbase.fs</a></div>
<h1 title="Class HFileSystem" class="title">Class HFileSystem</h1>
</div>
<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
<div class="inheritance">org.apache.hadoop.conf.Configured
<div class="inheritance">org.apache.hadoop.fs.FileSystem
<div class="inheritance">org.apache.hadoop.fs.FilterFileSystem
<div class="inheritance">org.apache.hadoop.hbase.fs.HFileSystem</div>
</div>
</div>
</div>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Implemented Interfaces:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html" title="class or interface in java.io" class="external-link">Closeable</a></code>, <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/AutoCloseable.html" title="class or interface in java.lang" class="external-link">AutoCloseable</a></code>, <code>org.apache.hadoop.conf.Configurable</code>, <code>org.apache.hadoop.fs.PathCapabilities</code>, <code>org.apache.hadoop.security.token.DelegationTokenIssuer</code></dd>
</dl>
<hr>
<div class="type-signature"><span class="annotations">@Private
</span><span class="modifiers">public class </span><span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-62">HFileSystem</a></span>
<span class="extends-implements">extends org.apache.hadoop.fs.FilterFileSystem</span></div>
<div class="block">An encapsulation for the FileSystem object that hbase uses to access data. This class allows the
flexibility of using separate filesystem objects for reading and writing hfiles and wals.</div>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ======== NESTED CLASS SUMMARY ======== -->
<li>
<section class="nested-class-summary" id="nested-class-summary">
<h2>Nested Class Summary</h2>
<div class="caption"><span>Nested Classes</span></div>
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Class</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>(package private) static interface&nbsp;</code></div>
<div class="col-second even-row-color"><code><a href="HFileSystem.ReorderBlocks.html" class="type-name-link" title="interface in org.apache.hadoop.hbase.fs">HFileSystem.ReorderBlocks</a></code></div>
<div class="col-last even-row-color">
<div class="block">Interface to implement to add a specific reordering logic in hdfs.</div>
</div>
<div class="col-first odd-row-color"><code>(package private) static class&nbsp;</code></div>
<div class="col-second odd-row-color"><code><a href="HFileSystem.ReorderWALBlocks.html" class="type-name-link" title="class in org.apache.hadoop.hbase.fs">HFileSystem.ReorderWALBlocks</a></code></div>
<div class="col-last odd-row-color">
<div class="block">We're putting at lowest priority the wal files blocks that are on the same datanode as the
original regionserver which created these files.</div>
</div>
</div>
<div class="inherited-list">
<h2 id="nested-classes-inherited-from-class-org.apache.hadoop.fs.FileSystem">Nested classes/interfaces inherited from class&nbsp;org.apache.hadoop.fs.FileSystem</h2>
<code>org.apache.hadoop.fs.FileSystem.DirectoryEntries, org.apache.hadoop.fs.FileSystem.DirListingIterator&lt;T extends org.apache.hadoop.fs.FileStatus&gt;, org.apache.hadoop.fs.FileSystem.Statistics</code></div>
</section>
</li>
<!-- =========== FIELD SUMMARY =========== -->
<li>
<section class="field-summary" id="field-summary">
<h2>Field Summary</h2>
<div class="caption"><span>Fields</span></div>
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Field</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>static final org.slf4j.Logger</code></div>
<div class="col-second even-row-color"><code><a href="#LOG" class="member-name-link">LOG</a></code></div>
<div class="col-last even-row-color">&nbsp;</div>
<div class="col-first odd-row-color"><code>private final org.apache.hadoop.fs.FileSystem</code></div>
<div class="col-second odd-row-color"><code><a href="#noChecksumFs" class="member-name-link">noChecksumFs</a></code></div>
<div class="col-last odd-row-color">&nbsp;</div>
<div class="col-first even-row-color"><code>private static byte</code></div>
<div class="col-second even-row-color"><code><a href="#unspecifiedStoragePolicyId" class="member-name-link">unspecifiedStoragePolicyId</a></code></div>
<div class="col-last even-row-color">&nbsp;</div>
<div class="col-first odd-row-color"><code>private final boolean</code></div>
<div class="col-second odd-row-color"><code><a href="#useHBaseChecksum" class="member-name-link">useHBaseChecksum</a></code></div>
<div class="col-last odd-row-color">&nbsp;</div>
</div>
<div class="inherited-list">
<h3 id="fields-inherited-from-class-org.apache.hadoop.fs.FilterFileSystem">Fields inherited from class&nbsp;org.apache.hadoop.fs.FilterFileSystem</h3>
<code>fs, swapScheme</code></div>
<div class="inherited-list">
<h3 id="fields-inherited-from-class-org.apache.hadoop.fs.FileSystem">Fields inherited from class&nbsp;org.apache.hadoop.fs.FileSystem</h3>
<code>DEFAULT_FS, FS_DEFAULT_NAME_KEY, SHUTDOWN_HOOK_PRIORITY, statistics, TRASH_PREFIX, USER_HOME_PREFIX</code></div>
</section>
</li>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<li>
<section class="constructor-summary" id="constructor-summary">
<h2>Constructor Summary</h2>
<div class="caption"><span>Constructors</span></div>
<div class="summary-table two-column-summary">
<div class="table-header col-first">Constructor</div>
<div class="table-header col-last">Description</div>
<div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E(org.apache.hadoop.conf.Configuration,boolean)" class="member-name-link">HFileSystem</a><wbr>(org.apache.hadoop.conf.Configuration&nbsp;conf,
boolean&nbsp;useHBaseChecksum)</code></div>
<div class="col-last even-row-color">
<div class="block">Create a FileSystem object for HBase regionservers.</div>
</div>
<div class="col-constructor-name odd-row-color"><code><a href="#%3Cinit%3E(org.apache.hadoop.fs.FileSystem)" class="member-name-link">HFileSystem</a><wbr>(org.apache.hadoop.fs.FileSystem&nbsp;fs)</code></div>
<div class="col-last odd-row-color">
<div class="block">Wrap a FileSystem object within a HFileSystem.</div>
</div>
</div>
</section>
</li>
<!-- ========== METHOD SUMMARY =========== -->
<li>
<section class="method-summary" id="method-summary">
<h2>Method Summary</h2>
<div id="method-summary-table">
<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
<div id="method-summary-table.tabpanel" role="tabpanel" aria-labelledby="method-summary-table-tab0">
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static boolean</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#addLocationsOrderInterceptor(org.apache.hadoop.conf.Configuration)" class="member-name-link">addLocationsOrderInterceptor</a><wbr>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>(package private) static boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#addLocationsOrderInterceptor(org.apache.hadoop.conf.Configuration,org.apache.hadoop.hbase.fs.HFileSystem.ReorderBlocks)" class="member-name-link">addLocationsOrderInterceptor</a><wbr>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="HFileSystem.ReorderBlocks.html" title="interface in org.apache.hadoop.hbase.fs">HFileSystem.ReorderBlocks</a>&nbsp;lrb)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Add an interceptor on the calls to the namenode#getBlockLocations from the DFSClient linked to
this FileSystem.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#close()" class="member-name-link">close</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Close this filesystem object</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>org.apache.hadoop.fs.FSDataOutputStream</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#createNonRecursive(org.apache.hadoop.fs.Path,boolean,int,short,long,org.apache.hadoop.util.Progressable)" class="member-name-link">createNonRecursive</a><wbr>(org.apache.hadoop.fs.Path&nbsp;f,
boolean&nbsp;overwrite,
int&nbsp;bufferSize,
short&nbsp;replication,
long&nbsp;blockSize,
org.apache.hadoop.util.Progressable&nbsp;progress)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">The org.apache.hadoop.fs.FilterFileSystem does not yet support createNonRecursive.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>private static org.apache.hadoop.hdfs.protocol.ClientProtocol</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#createReorderingProxy(org.apache.hadoop.hdfs.protocol.ClientProtocol,org.apache.hadoop.hbase.fs.HFileSystem.ReorderBlocks,org.apache.hadoop.conf.Configuration)" class="member-name-link">createReorderingProxy</a><wbr>(org.apache.hadoop.hdfs.protocol.ClientProtocol&nbsp;cp,
<a href="HFileSystem.ReorderBlocks.html" title="interface in org.apache.hadoop.hbase.fs">HFileSystem.ReorderBlocks</a>&nbsp;lrb,
org.apache.hadoop.conf.Configuration&nbsp;conf)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static org.apache.hadoop.fs.FileSystem</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#get(org.apache.hadoop.conf.Configuration)" class="member-name-link">get</a><wbr>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Create a new HFileSystem object, similar to FileSystem.get().</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>org.apache.hadoop.fs.FileSystem</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getBackingFs()" class="member-name-link">getBackingFs</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns the underlying filesystem</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>org.apache.hadoop.fs.FileSystem</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getNoChecksumFs()" class="member-name-link">getNoChecksumFs</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns the filesystem that is specially setup for doing reads from storage.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>private <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getStoragePolicyForOldHDFSVersion(org.apache.hadoop.fs.Path)" class="member-name-link">getStoragePolicyForOldHDFSVersion</a><wbr>(org.apache.hadoop.fs.Path&nbsp;path)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Before Hadoop 2.8.0, there's no getStoragePolicy method for FileSystem interface, and we need
to keep compatible with it.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getStoragePolicyName(org.apache.hadoop.fs.Path)" class="member-name-link">getStoragePolicyName</a><wbr>(org.apache.hadoop.fs.Path&nbsp;path)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Get the storage policy of the source path (directory/file).</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>private org.apache.hadoop.fs.FileSystem</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#maybeWrapFileSystem(org.apache.hadoop.fs.FileSystem,org.apache.hadoop.conf.Configuration)" class="member-name-link">maybeWrapFileSystem</a><wbr>(org.apache.hadoop.fs.FileSystem&nbsp;base,
org.apache.hadoop.conf.Configuration&nbsp;conf)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns an instance of Filesystem wrapped into the class specified in hbase.fs.wrapper
property, if one is set in the configuration, returns unmodified FS instance passed in as an
argument otherwise.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>private static org.apache.hadoop.fs.FileSystem</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#newInstanceFileSystem(org.apache.hadoop.conf.Configuration)" class="member-name-link">newInstanceFileSystem</a><wbr>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Returns a brand new instance of the FileSystem.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#setStoragePolicy(org.apache.hadoop.fs.Path,java.lang.String)" class="member-name-link">setStoragePolicy</a><wbr>(org.apache.hadoop.fs.Path&nbsp;path,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;policyName)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Set the source path (directory/file) to the specified storage policy.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#useHBaseChecksum()" class="member-name-link">useHBaseChecksum</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Are we verifying checksums in HBase?</div>
</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.hadoop.fs.FilterFileSystem">Methods inherited from class&nbsp;org.apache.hadoop.fs.FilterFileSystem</h3>
<code>access, append, appendFile, canonicalizeUri, checkPath, completeLocalOutput, concat, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyToLocalFile, create, create, createFile, createNonRecursive, createPathHandle, createSnapshot, createSymlink, delete, deleteSnapshot, getAclStatus, getAllStoragePolicies, getCanonicalUri, getChildFileSystems, getConf, getDefaultBlockSize, getDefaultBlockSize, getDefaultReplication, getDefaultReplication, getFileBlockLocations, getFileChecksum, getFileChecksum, getFileLinkStatus, getFileStatus, getHomeDirectory, getInitialWorkingDirectory, getLinkTarget, getRawFileSystem, getServerDefaults, getServerDefaults, getStatus, getStoragePolicy, getTrashRoot, getTrashRoots, getUri, getUsed, getUsed, getWorkingDirectory, getXAttr, getXAttrs, getXAttrs, hasPathCapability, initialize, listCorruptFileBlocks, listLocatedStatus, listLocatedStatus, listStatus, listStatusIterator, listXAttrs, makeQualified, mkdirs, mkdirs, modifyAclEntries, msync, open, open, openFile, openFile, openFileWithOptions, openFileWithOptions, primitiveCreate, primitiveMkdir, removeAcl, removeAclEntries, removeDefaultAcl, removeXAttr, rename, rename, renameSnapshot, resolveLink, resolvePath, satisfyStoragePolicy, setAcl, setOwner, setPermission, setReplication, setTimes, setVerifyChecksum, setWorkingDirectory, setWriteChecksum, setXAttr, setXAttr, startLocalOutput, supportsSymlinks, truncate, unsetStoragePolicy</code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.hadoop.fs.FileSystem">Methods inherited from class&nbsp;org.apache.hadoop.fs.FileSystem</h3>
<code>append, append, areSymlinksEnabled, cancelDeleteOnExit, clearStatistics, closeAll, closeAllForUGI, copyFromLocalFile, copyToLocalFile, copyToLocalFile, create, create, create, create, create, create, create, create, create, create, create, createDataInputStreamBuilder, createDataInputStreamBuilder, createDataOutputStreamBuilder, createMultipartUploader, createNewFile, createNonRecursive, createSnapshot, delete, deleteOnExit, enableSymlinks, exists, fixRelativePart, get, get, getAdditionalTokenIssuers, getAllStatistics, getBlockSize, getCanonicalServiceName, getContentSummary, getDefaultPort, getDefaultUri, getDelegationToken, getFileBlockLocations, getFileSystemClass, getFSofPath, getGlobalStorageStatistics, getLength, getLocal, getName, getNamed, getPathHandle, getQuotaUsage, getReplication, getScheme, getStatistics, getStatistics, getStatus, getStorageStatistics, globStatus, globStatus, isDirectory, isFile, listFiles, listStatus, listStatus, listStatus, listStatusBatch, mkdirs, moveFromLocalFile, moveFromLocalFile, moveToLocalFile, newInstance, newInstance, newInstance, newInstanceLocal, open, open, primitiveMkdir, printStatistics, processDeleteOnExit, setDefaultUri, setDefaultUri, setQuota, setQuotaByStorageType</code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.hadoop.conf.Configured">Methods inherited from class&nbsp;org.apache.hadoop.conf.Configured</h3>
<code>setConf</code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.hadoop.security.token.DelegationTokenIssuer">Methods inherited from interface&nbsp;org.apache.hadoop.security.token.DelegationTokenIssuer</h3>
<code>addDelegationTokens</code></div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ============ FIELD DETAIL =========== -->
<li>
<section class="field-details" id="field-detail">
<h2>Field Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="LOG">
<h3>LOG</h3>
<div class="member-signature"><span class="modifiers">public static final</span>&nbsp;<span class="return-type">org.slf4j.Logger</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-64">LOG</a></span></div>
</section>
</li>
<li>
<section class="detail" id="noChecksumFs">
<h3>noChecksumFs</h3>
<div class="member-signature"><span class="modifiers">private final</span>&nbsp;<span class="return-type">org.apache.hadoop.fs.FileSystem</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-66">noChecksumFs</a></span></div>
</section>
</li>
<li>
<section class="detail" id="useHBaseChecksum">
<h3>useHBaseChecksum</h3>
<div class="member-signature"><span class="modifiers">private final</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-67">useHBaseChecksum</a></span></div>
</section>
</li>
<li>
<section class="detail" id="unspecifiedStoragePolicyId">
<h3>unspecifiedStoragePolicyId</h3>
<div class="member-signature"><span class="modifiers">private static volatile</span>&nbsp;<span class="return-type">byte</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-68">unspecifiedStoragePolicyId</a></span></div>
</section>
</li>
</ul>
</section>
</li>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<li>
<section class="constructor-details" id="constructor-detail">
<h2>Constructor Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="&lt;init&gt;(org.apache.hadoop.conf.Configuration,boolean)">
<h3>HFileSystem</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-76">HFileSystem</a></span><wbr><span class="parameters">(org.apache.hadoop.conf.Configuration&nbsp;conf,
boolean&nbsp;useHBaseChecksum)</span>
throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
<div class="block">Create a FileSystem object for HBase regionservers.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>conf</code> - The configuration to be used for the filesystem</dd>
<dd><code>useHBaseChecksum</code> - if true, then use checksum verfication in hbase, otherwise delegate
checksum verification to the FileSystem.</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="&lt;init&gt;(org.apache.hadoop.fs.FileSystem)">
<h3>HFileSystem</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-123">HFileSystem</a></span><wbr><span class="parameters">(org.apache.hadoop.fs.FileSystem&nbsp;fs)</span></div>
<div class="block">Wrap a FileSystem object within a HFileSystem. The noChecksumFs and writefs are both set to be
the same specified fs. Do not verify hbase-checksums while reading data from filesystem.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>fs</code> - Set the noChecksumFs and writeFs to this specified filesystem.</dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="getNoChecksumFs()">
<h3>getNoChecksumFs</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">org.apache.hadoop.fs.FileSystem</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-134">getNoChecksumFs</a></span>()</div>
<div class="block">Returns the filesystem that is specially setup for doing reads from storage. This object avoids
doing checksum verifications for reads.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>The FileSystem object that can be used to read data from files.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getBackingFs()">
<h3>getBackingFs</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">org.apache.hadoop.fs.FileSystem</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-142">getBackingFs</a></span>()
throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
<div class="block">Returns the underlying filesystem</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>The underlying FileSystem for this FilterFileSystem object.</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="setStoragePolicy(org.apache.hadoop.fs.Path,java.lang.String)">
<h3>setStoragePolicy</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-153">setStoragePolicy</a></span><wbr><span class="parameters">(org.apache.hadoop.fs.Path&nbsp;path,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;policyName)</span></div>
<div class="block">Set the source path (directory/file) to the specified storage policy.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code>setStoragePolicy</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.fs.FilterFileSystem</code></dd>
<dt>Parameters:</dt>
<dd><code>path</code> - The source path (directory/file).</dd>
<dd><code>policyName</code> - The name of the storage policy: 'HOT', 'COLD', etc. See see hadoop 2.6+
org.apache.hadoop.hdfs.protocol.HdfsConstants for possible list e.g 'COLD',
'WARM', 'HOT', 'ONE_SSD', 'ALL_SSD', 'LAZY_PERSIST'.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getStoragePolicyName(org.apache.hadoop.fs.Path)">
<h3>getStoragePolicyName</h3>
<div class="member-signature"><span class="annotations">@Nullable
</span><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-163">getStoragePolicyName</a></span><wbr><span class="parameters">(org.apache.hadoop.fs.Path&nbsp;path)</span></div>
<div class="block">Get the storage policy of the source path (directory/file).</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>path</code> - The source path (directory/file).</dd>
<dt>Returns:</dt>
<dd>Storage policy name, or <code>null</code> if not using <code>DistributedFileSystem</code> or
exception thrown when trying to get policy</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getStoragePolicyForOldHDFSVersion(org.apache.hadoop.fs.Path)">
<h3>getStoragePolicyForOldHDFSVersion</h3>
<div class="member-signature"><span class="modifiers">private</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-184">getStoragePolicyForOldHDFSVersion</a></span><wbr><span class="parameters">(org.apache.hadoop.fs.Path&nbsp;path)</span></div>
<div class="block">Before Hadoop 2.8.0, there's no getStoragePolicy method for FileSystem interface, and we need
to keep compatible with it. See HADOOP-12161 for more details.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>path</code> - Path to get storage policy against</dd>
<dt>Returns:</dt>
<dd>the storage policy name</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="useHBaseChecksum()">
<h3>useHBaseChecksum</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-219">useHBaseChecksum</a></span>()</div>
<div class="block">Are we verifying checksums in HBase?</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>True, if hbase is configured to verify checksums, otherwise false.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="close()">
<h3>close</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-226">close</a></span>()
throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
<div class="block">Close this filesystem object</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/AutoCloseable.html#close()" title="class or interface in java.lang" class="external-link">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/AutoCloseable.html" title="class or interface in java.lang" class="external-link">AutoCloseable</a></code></dd>
<dt>Specified by:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html#close()" title="class or interface in java.io" class="external-link">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html" title="class or interface in java.io" class="external-link">Closeable</a></code></dd>
<dt>Overrides:</dt>
<dd><code>close</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.fs.FilterFileSystem</code></dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="newInstanceFileSystem(org.apache.hadoop.conf.Configuration)">
<h3>newInstanceFileSystem</h3>
<div class="member-signature"><span class="modifiers">private static</span>&nbsp;<span class="return-type">org.apache.hadoop.fs.FileSystem</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-240">newInstanceFileSystem</a></span><wbr><span class="parameters">(org.apache.hadoop.conf.Configuration&nbsp;conf)</span>
throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
<div class="block">Returns a brand new instance of the FileSystem. It does not use the FileSystem.Cache. In newer
versions of HDFS, we can directly invoke FileSystem.newInstance(Configuration).</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>conf</code> - Configuration</dd>
<dt>Returns:</dt>
<dd>A new instance of the filesystem</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="maybeWrapFileSystem(org.apache.hadoop.fs.FileSystem,org.apache.hadoop.conf.Configuration)">
<h3>maybeWrapFileSystem</h3>
<div class="member-signature"><span class="modifiers">private</span>&nbsp;<span class="return-type">org.apache.hadoop.fs.FileSystem</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-271">maybeWrapFileSystem</a></span><wbr><span class="parameters">(org.apache.hadoop.fs.FileSystem&nbsp;base,
org.apache.hadoop.conf.Configuration&nbsp;conf)</span></div>
<div class="block">Returns an instance of Filesystem wrapped into the class specified in hbase.fs.wrapper
property, if one is set in the configuration, returns unmodified FS instance passed in as an
argument otherwise.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>base</code> - Filesystem instance to wrap</dd>
<dd><code>conf</code> - Configuration</dd>
<dt>Returns:</dt>
<dd>wrapped instance of FS, or the same instance if no wrapping configured.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="addLocationsOrderInterceptor(org.apache.hadoop.conf.Configuration)">
<h3>addLocationsOrderInterceptor</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-284">addLocationsOrderInterceptor</a></span><wbr><span class="parameters">(org.apache.hadoop.conf.Configuration&nbsp;conf)</span>
throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
<dl class="notes">
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="addLocationsOrderInterceptor(org.apache.hadoop.conf.Configuration,org.apache.hadoop.hbase.fs.HFileSystem.ReorderBlocks)">
<h3>addLocationsOrderInterceptor</h3>
<div class="member-signature"><span class="modifiers">static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-295">addLocationsOrderInterceptor</a></span><wbr><span class="parameters">(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="HFileSystem.ReorderBlocks.html" title="interface in org.apache.hadoop.hbase.fs">HFileSystem.ReorderBlocks</a>&nbsp;lrb)</span></div>
<div class="block">Add an interceptor on the calls to the namenode#getBlockLocations from the DFSClient linked to
this FileSystem. See HBASE-6435 for the background.
<p/>
There should be no reason, except testing, to create a specific ReorderBlocks.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>true if the interceptor was added, false otherwise.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="createReorderingProxy(org.apache.hadoop.hdfs.protocol.ClientProtocol,org.apache.hadoop.hbase.fs.HFileSystem.ReorderBlocks,org.apache.hadoop.conf.Configuration)">
<h3>createReorderingProxy</h3>
<div class="member-signature"><span class="modifiers">private static</span>&nbsp;<span class="return-type">org.apache.hadoop.hdfs.protocol.ClientProtocol</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-352">createReorderingProxy</a></span><wbr><span class="parameters">(org.apache.hadoop.hdfs.protocol.ClientProtocol&nbsp;cp,
<a href="HFileSystem.ReorderBlocks.html" title="interface in org.apache.hadoop.hbase.fs">HFileSystem.ReorderBlocks</a>&nbsp;lrb,
org.apache.hadoop.conf.Configuration&nbsp;conf)</span></div>
</section>
</li>
<li>
<section class="detail" id="get(org.apache.hadoop.conf.Configuration)">
<h3>get</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">org.apache.hadoop.fs.FileSystem</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-452">get</a></span><wbr><span class="parameters">(org.apache.hadoop.conf.Configuration&nbsp;conf)</span>
throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
<div class="block">Create a new HFileSystem object, similar to FileSystem.get(). This returns a filesystem object
that avoids checksum verification in the filesystem for hfileblock-reads. For these blocks,
checksum verification is done by HBase.</div>
<dl class="notes">
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="createNonRecursive(org.apache.hadoop.fs.Path,boolean,int,short,long,org.apache.hadoop.util.Progressable)">
<h3>createNonRecursive</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">org.apache.hadoop.fs.FSDataOutputStream</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/fs/HFileSystem.html#line-460">createNonRecursive</a></span><wbr><span class="parameters">(org.apache.hadoop.fs.Path&nbsp;f,
boolean&nbsp;overwrite,
int&nbsp;bufferSize,
short&nbsp;replication,
long&nbsp;blockSize,
org.apache.hadoop.util.Progressable&nbsp;progress)</span>
throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
<div class="block">The org.apache.hadoop.fs.FilterFileSystem does not yet support createNonRecursive. This is a
hadoop bug and when it is fixed in Hadoop, this definition will go away.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code>createNonRecursive</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.fs.FileSystem</code></dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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