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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:

	•
	   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 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.

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