alluxio.fuse

Class StackFS

java.lang.Object

alluxio.jnifuse.AbstractFuseFileSystem

alluxio.fuse.StackFS

All Implemented Interfaces:

FuseFileSystem

public class StackFS
extends AbstractFuseFileSystem

Stack FS implements the FUSE callbacks defined by jni-fuse without interactions with Alluxio clients/servers.

Stack FS mounts a local filesystem path to another local filesystem path. All the operations target the Stack FS mount point will be directly trigger on the local filesystem mounted path without complex added logics.

This class is mainly added for testing purposes to understand the performance overhead introduced by jni-fuse and provides an upper-bound performance data for Alluxio jni-fuse implementations.

Constructor Summary

Constructors

Constructor and Description
StackFS(Path root, Path mountPoint)

Method Summary

Modifier and Type	Method and Description
int	flush(String path, FuseFileInfo fi)
int	getattr(String path, FileStat stat)
String	getFileSystemName()
int	open(String path, FuseFileInfo fi)
int	read(String path, ByteBuffer buf, long size, long offset, FuseFileInfo fi)
int	readdir(String path, long bufaddr, FuseFillDir filter, long offset, FuseFileInfo fi)
int	release(String path, FuseFileInfo fi)

Methods inherited from class alluxio.jnifuse.AbstractFuseFileSystem

chmodCallback, chownCallback, createCallback, flushCallback, getattrCallback, getLibFuse, mkdirCallback, mount, openCallback, readCallback, readdirCallback, releaseCallback, renameCallback, rmdirCallback, statfsCallback, truncateCallback, umount, unlinkCallback, writeCallback

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface alluxio.jnifuse.FuseFileSystem

chmod, chown, create, getContext, link, mkdir, opendir, releasedir, rename, rmdir, statfs, symlink, truncate, unlink, write

Constructor Detail

StackFS

public StackFS(Path root,
               Path mountPoint)

Parameters:

root - root

mountPoint - mount point

Method Detail

getattr

public int getattr(String path,
                   FileStat stat)

readdir

public int readdir(String path,
                   long bufaddr,
                   FuseFillDir filter,
                   long offset,
                   FuseFileInfo fi)

open

public int open(String path,
                FuseFileInfo fi)

read

public int read(String path,
                ByteBuffer buf,
                long size,
                long offset,
                FuseFileInfo fi)

flush

public int flush(String path,
                 FuseFileInfo fi)

release

public int release(String path,
                   FuseFileInfo fi)

getFileSystemName

public String getFileSystemName()