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VFS_READAHEAD(8)
NAME
  vfs_readahead - pre-load the kernel buffer cache

SYNOPSIS
  vfs objects = readahead

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

  This vfs_readahead VFS module detects read requests at multiples of a given
  offset (hex 0x80000 by default) and then tells the kernel via either the
  readahead system call (on Linux) or the posix_fadvise system call to pre-
  fetch this data into the buffer cache.

  This module is useful for Windows Vista clients reading data using the
  Windows Explorer program, which asynchronously does multiple file read
  requests at offset boundaries of 0x80000 bytes.

  The offset multiple used is given by the readahead:offset option, which
  defaults to 0x80000.

  The size of the disk read operations performed by vfs_readahead is
  determined by the readahead:length option. By default this is set to the
  same value as the readahead:offset option and if not set explicitly will
  use the current value of readahead:offset.

  This module is stackable.

OPTIONS
  readahead:offset = BYTES
     The offset multiple that causes readahead to be requested of the kernel
     buffer cache.

  readahead:length = BYTES
     The number of bytes requested to be read into the kernel buffer cache on
     each readahead call.

  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
	  [hypothetical]
	  vfs objects = readahead

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.

Index for Section 8

Alphabetical listing for V

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