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man pages section 8: System Administration Commands

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Updated: Thursday, June 13, 2019
 
 

vfs_prealloc (8)

Name

vfs_prealloc - preallocate matching files to a predetermined size

Synopsis

vfs objects = prealloc

Description

System Administration tools                                    VFS_PREALLOC(8)



NAME
       vfs_prealloc - preallocate matching files to a predetermined size

SYNOPSIS
       vfs objects = prealloc

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

       The vfs_prealloc VFS module preallocates files to a specified size each
       time a new file is created. This is useful in environments where files
       are of a predetermined size will be written to a disk subsystem where
       extending file allocations is expensive.

       This module is stackable.

OPTIONS
       prealloc:EXT = BYTES
           Preallocate all files with the extension EXT to the size specified
           by BYTES.

           The following suffixes may be applied to BYTES:

                  o   K - BYTES is a number of kilobytes

                  o   M - BYTES is a number of megabytes

                  o   G - BYTES is a number of gigabytes


EXAMPLES
       A process writes TIFF files to a Samba share, and the is known these
       files will almost always be around 4 megabytes (4194304 bytes):

                   [frames]
                path = /data/frames
                vfs objects = prealloc
                prealloc:tiff = 4M

CAVEATS
       vfs_prealloc is not supported on all platforms and filesystems.
       Currently only XFS filesystems on Linux and IRIX are supported.

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_PREALLOC(8)