vfs_time_audit(8) [centos man page]

VFS_TIME_AUDIT(8)					    System Administration tools 					 VFS_TIME_AUDIT(8)

NAME

       vfs_time_audit - samba vfs module to log slow VFS operations

SYNOPSIS

       vfs objects = time_audit

DESCRIPTION

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

       The time_audit VFS module logs system calls that take longer than the number of milliseconds defined by the variable time_audit:timeout. It
       will log the calls and the time spent in it.

       It's kind of comparable with strace -T and is helpful to reveal performance problems with the underlying file and storage subsystems.

       This module is stackable.

OPTIONS

       time_audit:timeout = number of milliseconds
	   VFS calls that take longer than the defined number of milliseconds that should be logged. The default is 10000 (10s).

EXAMPLES

       This would log VFS calls that take longer than 3 seconds:

		   [sample_share]
		path = /test/sample_share
		vfs objects = time_audit
		time_audit:timeout = 3000

VERSION

       This man page is correct for version 4.0.0 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.

       The time_audit VFS module was created with contributions from Abhidnya Chirmule.

Samba 4.0							    06/17/2014							 VFS_TIME_AUDIT(8)

VFS_SYNCOPS(8)						    System Administration tools 					    VFS_SYNCOPS(8)

NAME

       vfs_syncops - Ensure meta data operations are performed synchronously.

SYNOPSIS

       vfs objects = syncops

DESCRIPTION

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

       Some filesystems (even some journaled filesystems) require that a fsync() be performed on many meta data operations to ensure that the
       operation is guaranteed to remain in the filesystem after a power failure. This is particularly important for some cluster filesystems
       which are participating in a node failover system with clustered Samba. On those filesystems the vfs_syncops VFS module provides a way to
       perform those operations safely.

       This module is stackable.

CONFIGURATION

       Most of the performance loss with the vfs_syncops VFS module is in fsync on close(). You can disable that with syncops:onclose = no that
       can be set either globally or per share.

       On certain filesystems that only require the last data written to be fsync()'ed, you can disable the metadata synchronization of this
       module with syncops:onmeta = no. This option can be set either globally or per share.

       The vfs_syncops VFS module can also be disabled completely for a share with syncops:disable = true.

EXAMPLES

       Add syncops functionality for [share]:

		   [share]
		path = /data/share
		vfs objects = syncops
		syncops:onclose = no

VERSION

       This man page is correct for version 4.1.0 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.

Samba 4.1							    06/17/2014							    VFS_SYNCOPS(8)