The OpenNET Project / Index page

[ новости /+++ | форум | wiki | теги | ]

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

elvtune ()
  • >> elvtune (8) ( Linux man: Команды системного администрирования )
  •  

    NAME

    elvtune - I/O elevator tuner
     
    

    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 performance 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 tuning 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

    Andrea Arcangeli <andrea@suse.de> SuSE


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    NOTE
    RETURN VALUE
    HISTORY
    AUTHORS


    Поиск по тексту MAN-ов: 




    Спонсоры:
    Inferno Solutions
    Hosting by Hoster.ru
    Хостинг:

    Закладки на сайте
    Проследить за страницей
    Created 1996-2020 by Maxim Chirkov
    Добавить, Поддержать, Вебмастеру