vfs_commit

Name

vfs_commit — flush dirty data at specified intervals

Synopsis

vfs objects = commit

DESCRIPTION

This VFS module is part of the + samba(7) suite.

The vfs_commit VFS module keeps track of + the amount of data written to a file and synchronizes it to + disk when a specified amount accumulates. +

vfs_commit is useful in two + circumstances. First, if you have very precious data, the + impact of unexpected power loss can be minimized by a small + commit:dthresh value. Secondly, write performance can be + improved on some systems by flushing file data early and at + regular intervals.

This module is stackable.

OPTIONS

commit:dthresh = BYTES

Synchronize file data each time the specified + number of bytes has been written. +

The following suffixes may be applied to BYTES:

K - BYTES is a number of kilobytes
M - BYTES is a number of megabytes
G - BYTES is a number of gigabytes

EXAMPLES

Synchronize the file data on the [precious] share after + every 512 kilobytes (524288 bytes) of data is written:

+        [precious]
+	path = /data/precious
+	vfs objects = commit
+	commit:dthresh = 512K
+

CAVEATS

On some systems, the data synchronization performed by + commit may reduce performance. +

VERSION

This man page is correct for version 3.0.25 of the Samba suite. +

AUTHOR

The original Samba software and related utilities + were created by Andrew Tridgell. Samba is now developed + by the Samba Team as an Open Source project similar + to the way the Linux kernel is developed.