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man pages section 8: System Administration Commands

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Updated: Thursday, June 13, 2019
 
 

vfs_syncops (8)

Name

vfs_syncops - Ensure meta data operations are performed synchronously.

Synopsis

vfs objects = syncops

Description

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 part of version 4.9.3 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.



ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+-----------------------+
       |ATTRIBUTE TYPE |   ATTRIBUTE VALUE     |
       +---------------+-----------------------+
       |Availability   | service/network/samba |
       +---------------+-----------------------+
       |Stability      | Volatile              |
       +---------------+-----------------------+
NOTES
       This software was built from source available at
       https://github.com/oracle/solaris-userland.  The original community
       source was downloaded from
       https://download.samba.org/pub/samba/stable/samba-4.9.3.tar.gz

       Further information about this software can be found on the open source
       community website at http://www.samba.org/.



Samba 4.9.3                       01/24/2019                    VFS_SYNCOPS(8)