vfs_readahead - pre-load the kernel buffer cache
vfs objects =
This VFS module is part of the samba
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
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
This module is stackable.
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
•M - BYTES is a number of
•G - BYTES is a number of
vfs objects = readahead
This man page is correct for version 3.0.25 of the Samba suite.
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.