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 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.

Samba 3.0                         05/28/2008                   VFS_PREALLOC(8)