Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Contact Us
Online Help
Domain Status
Man Pages

Virtual Servers

Topology Map

Server Agreement
Year 2038

USA Flag



Man Pages
VFS_READAHEAD(8) System Administration tools VFS_READAHEAD(8)

vfs_readahead - pre-load the kernel buffer cache

vfs objects = readahead

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.

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

	 vfs objects = readahead

This man page is part of version 4.8.7 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.
11/26/2018 Samba 4.8.7

Search for    or go to Top of page |  Section 8 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.