----- Message from centos.admin@xxxxxxxxx ---------
Date: Thu, 9 Jun 2011 17:24:23 +0800
From: Emmanuel Noobadmin <centos.admin@xxxxxxxxx>
Subject: Possible to use multiple disk to bypass I/O wait?
To: CentOS mailing list <centos@xxxxxxxxxx>, linux-raid
<linux-raid@xxxxxxxxxxxxxxx>
I'm trying to resolve an I/O problem on a CentOS 5.6 server. The
process basically scans through Maildirs, checking for space usage and
quota. Because there are hundred odd user folders and several 10s of
thousands of small files, this sends the I/O wait % way high. The
server hits a very high load level and stops responding to other
requests until the crawl is done.
I am wondering if I add another disk and symlink the sub-directories
to that, would that free up the server to respond to other requests
despite the wait on that disk?
Have you tried using ionice -c 3 on the process?
----- End message from centos.admin@xxxxxxxxx -----
========================================================================
# _ __ _ __ http://www.nagilum.org/ \n icq://69646724 #
# / |/ /__ ____ _(_) /_ ____ _ nagilum@xxxxxxxxxxx \n +491776461165 #
# / / _ `/ _ `/ / / // / ' \ Amiga (68k/PPC): AOS/NetBSD/Linux #
# /_/|_/\_,_/\_, /_/_/\_,_/_/_/_/ Mac (PPC): MacOS-X / NetBSD /Linux #
# /___/ x86: FreeBSD/Linux/Solaris/Win2k ARM9: EPOC EV6 #
========================================================================
----------------------------------------------------------------
cakebox.homeunix.net - all the machine one needs..
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
