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VFS_CACHEPRIME(8)	  System Administration	tools	     VFS_CACHEPRIME(8)

NAME
       vfs_cacheprime -	prime the kernel file data cache

SYNOPSIS
       vfs objects = cacheprime

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

       The vfs_cacheprime VFS module reads chunks of file data near the	range
       requested by clients in order to	make sure the data is present in the
       kernel file data	cache at the time when it is actually requested	by
       clients.

       The size	of the disk read operations performed by vfs_cacheprime	is
       determined by the cacheprime:rsize option. All disk read	operations are
       aligned on boundaries that are a	multiple of this size. Each range of
       the file	data is	primed at most once during the time the	client has the
       file open.

       This module is stackable.

OPTIONS
       cacheprime:rsize	= BYTES
	   The number of bytes with which to prime the kernel data cache.

	   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
       For a hypothetical disk array, it is necessary to ensure	that all read
       operations are of size 1	megabyte (1048576 bytes), and aligned on 1
       megabyte	boundaries:

		[hypothetical]
		vfs objects = cacheprime
		cacheprime:rsize = 1M

CAVEATS
       cacheprime is not a substitute for a general-purpose readahead
       mechanism. It is	intended for use only in very specific environments
       where disk operations must be aligned and sized to known	values (as
       much as that is possible).

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 4.6			  05/23/2017		     VFS_CACHEPRIME(8)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | CAVEATS | VERSION | AUTHOR

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