Welcome to Linux Knowledge Base and Tutorial
"The place where you learn linux"
Cactus

 Create an AccountHome | Submit News | Your Account  

Tutorial Menu
Linux Tutorial Home
Table of Contents

· Introduction to Operating Systems
· Linux Basics
· Working with the System
· Shells and Utilities
· Editing Files
· Basic Administration
· The Operating System
· The X Windowing System
· The Computer Itself
· Networking
· System Monitoring
· Solving Problems
· Security
· Installing and Upgrading
· Linux and Windows

Glossary
MoreInfo
Man Pages
Linux Topics
Test Your Knowledge

Site Menu
Site Map
FAQ
Copyright Info
Terms of Use
Privacy Info
Disclaimer
WorkBoard
Thanks
Donations
Advertising
Masthead / Impressum
Your Account

Communication
Feedback
Forums
Private Messages
Surveys

Features
HOWTOs
News Archive
Submit News
Topics
User Articles
Web Links

Google
Google


The Web
linux-tutorial.info

Who's Online
There are currently, 73 guest(s) and 0 member(s) that are online.

You are an Anonymous user. You can register for free by clicking here

  

elvtune



SYNOPSIS

       elvtune  [  -r  r_lat  ]  [  -w  w_lat  ]  [  -b  b_max  ]
       /dev/blkdev1 [ /dev/blkdev2 ...  ]

       elvtune -h

       elvtune -v


DESCRIPTION

       elvtune allows to tune the I/O  elevator  per  blockdevice
       queue  basis.  The  tuning  can be safely done at runtime.
       Tuning the elevator means being able to change  disk  per­
       formance and interactiveness. In the output of elvtune the
       address of the queue tuned will be shown  and  it  can  be
       considered as a queue ID.  For example multiple partitions
       in the same harddisk will share the same queue and so tun­
       ing one partition will be like tuning the whole HD.


OPTIONS

       -r r_lat
              set  the  max  latency  that the I/O scheduler will
              provide on each read.

       -w w_lat
              set the max latency that  the  I/O  scheduler  will
              provide on each write.

       -b b_max
              max  coalescing factor allowed on writes when there
              are reads pending in the queue.

       -h     help.

       -v     version.


NOTE

       Actually the only fields tunable are those relative to the
       IO  scheduler.  It's  not  possible to select a one-way or
       two-way elevator yet.

       For logical blockdevices like LVM the  tuning  has  to  be
       done  on the physical devices. Tuning the queue of the LVM
       logical device is useless.


RETURN VALUE

       0 on success and 1 on failure.


HISTORY

       Ioctls for tuning elevator behaviour were added  in  Linux
       2.3.99-pre1.


AUTHORS


  




Login
Nickname

Password

Security Code
Security Code
Type Security Code


Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.

Help if you can!


Amazon Wish List

Did You Know?
You can get all the latest Site and Linux news by checking out our news page.


Friends



Tell a Friend About Us

Bookmark and Share



Web site powered by PHP-Nuke

Is this information useful? At the very least you can help by spreading the word to your favorite newsgroups, mailing lists and forums.
All logos and trademarks in this site are property of their respective owner. The comments are property of their posters. Articles are the property of their respective owners. Unless otherwise stated in the body of the article, article content (C) 1994-2013 by James Mohr. All rights reserved. The stylized page/paper, as well as the terms "The Linux Tutorial", "The Linux Server Tutorial", "The Linux Knowledge Base and Tutorial" and "The place where you learn Linux" are service marks of James Mohr. All rights reserved.
The Linux Knowledge Base and Tutorial may contain links to sites on the Internet, which are owned and operated by third parties. The Linux Tutorial is not responsible for the content of any such third-party site. By viewing/utilizing this web site, you have agreed to our disclaimer, terms of use and privacy policy. Use of automated download software ("harvesters") such as wget, httrack, etc. causes the site to quickly exceed its bandwidth limitation and are therefore expressly prohibited. For more details on this, take a look here

PHP-Nuke Copyright © 2004 by Francisco Burzi. This is free software, and you may redistribute it under the GPL. PHP-Nuke comes with absolutely no warranty, for details, see the license.
Page Generation: 0.11 Seconds