Package org.apache.hadoop.io.nativeio

@Private @Unstable package org.apache.hadoop.io.nativeio

Various native IO-related calls not available in Java. These functions should generally be used alongside a fallback to another more portable mechanism.

Related Packages

Package	Description
org.apache.hadoop.io	Generic i/o code for use when reading and writing data to the network, to databases, and to files.
org.apache.hadoop.io.compress
org.apache.hadoop.io.erasurecode
org.apache.hadoop.io.retry	A mechanism for selectively retrying methods that throw exceptions under certain circumstances.
org.apache.hadoop.io.serializer	This package provides a mechanism for using different serialization frameworks in Hadoop.
org.apache.hadoop.io.wrappedio	Support for dynamic access to filesystem operations which are not available in older hadoop releases.

Class	Description
Errno	Enum representing POSIX errno values.
NativeIO	JNI wrappers for various native IO-related calls not available in Java.
NativeIO.POSIX
NativeIO.POSIX.CacheManipulator	Used to manipulate the operating system cache.
NativeIO.POSIX.NoMlockCacheManipulator	A CacheManipulator used for testing which does not actually call mlock.
NativeIO.POSIX.Pmem	JNI wrapper of persist memory operations.
NativeIO.POSIX.PmemMappedRegion	Denote memory region for a file mapped.
NativeIO.POSIX.Stat	Result type of the fstat call
NativeIO.POSIX.SupportState	Keeps the support state of PMDK.
NativeIO.Windows
NativeIO.Windows.AccessRight	Supported list of Windows access right flags
NativeIOException	An exception generated by a call to the native IO code.
SharedFileDescriptorFactory	A factory for creating shared file descriptors inside a given directory.