From: Ming Zhang <mingz@ele.uri.edu>
To: Dan Christensen <jdc@uwo.ca>
Cc: David Greaves <david@dgreaves.com>,
Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: RAID-5 streaming read performance
Date: Thu, 14 Jul 2005 10:23:37 -0400 [thread overview]
Message-ID: <1121351017.5544.29.camel@localhost.localdomain> (raw)
In-Reply-To: <1121344255.5544.7.camel@localhost.localdomain>
my problem here. this only apply to sdX not mdX. pls ignore this.
ming
On Thu, 2005-07-14 at 08:30 -0400, Ming Zhang wrote:
> > Also, is there a way to disable caching of reads? Having to clear
> > the cache by reading 900M each time slows down testing. I guess
> > I could reboot with mem=100M, but it'd be nice to disable/enable
> > caching on the fly. Hmm, maybe I can just run something like
> > memtest which locks a bunch of ram...
> after you run your code, check the meminfo, the cached value might be
> much lower than u expected. my feeling is that linux page cache will
> discard all cache if last file handle closed.
>
next prev parent reply other threads:[~2005-07-14 14:23 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-11 15:11 RAID-5 streaming read performance Dan Christensen
2005-07-13 2:08 ` Ming Zhang
2005-07-13 2:52 ` Dan Christensen
2005-07-13 3:15 ` berk walker
2005-07-13 12:24 ` Ming Zhang
2005-07-13 12:48 ` Dan Christensen
2005-07-13 12:52 ` Ming Zhang
2005-07-13 14:23 ` Dan Christensen
2005-07-13 14:29 ` Ming Zhang
2005-07-13 17:56 ` Dan Christensen
2005-07-13 22:38 ` Neil Brown
2005-07-14 0:09 ` Ming Zhang
2005-07-14 1:16 ` Neil Brown
2005-07-14 1:25 ` Ming Zhang
2005-07-13 18:02 ` David Greaves
2005-07-13 18:14 ` Ming Zhang
2005-07-13 21:18 ` David Greaves
2005-07-13 21:44 ` Ming Zhang
2005-07-13 21:50 ` David Greaves
2005-07-13 21:55 ` Ming Zhang
2005-07-13 22:52 ` Neil Brown
2005-07-14 3:58 ` Dan Christensen
2005-07-14 4:13 ` Mark Hahn
2005-07-14 21:16 ` Dan Christensen
2005-07-14 21:30 ` Ming Zhang
2005-07-14 23:29 ` Mark Hahn
2005-07-15 1:23 ` Ming Zhang
2005-07-15 2:11 ` Dan Christensen
2005-07-15 12:28 ` Ming Zhang
2005-07-14 12:30 ` Ming Zhang
2005-07-14 14:23 ` Ming Zhang [this message]
2005-07-14 17:54 ` Dan Christensen
2005-07-14 18:00 ` Ming Zhang
2005-07-14 18:03 ` Dan Christensen
2005-07-14 18:10 ` Ming Zhang
2005-07-14 19:16 ` Dan Christensen
2005-07-14 20:13 ` Ming Zhang
2005-07-15 2:38 ` Dan Christensen
2005-07-15 6:01 ` Holger Kiehl
2005-07-15 12:29 ` Ming Zhang
2005-07-13 22:42 ` Neil Brown
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1121351017.5544.29.camel@localhost.localdomain \
--to=mingz@ele.uri.edu \
--cc=david@dgreaves.com \
--cc=jdc@uwo.ca \
--cc=linux-raid@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.