vfs_prealloc(8)

Usage

vfs objects = prealloc

Overview

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:

• K - BYTES is a number of kilobytes

• M - BYTES is a number of megabytes

• 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 4.9.5-Debian of the Samba suite.

Releases

3 releases since Debian 8 (Jessie); the text changed 2 times.

8
9
10