From: Bart Kus <me@bartk.us>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Tracing IO requests?
Date: Wed, 02 Mar 2011 16:25:04 -0800 [thread overview]
Message-ID: <4D6EDFE0.2040905@bartk.us> (raw)
In-Reply-To: <20110302174412.06eecd67@bettercgi.com>
On 3/2/2011 3:44 PM, Ray Morris wrote:
>>> On 3/2/2011 12:13 PM, Jonathan Tripathy wrote:
>>> I know the IO is only being caused by a "cp -a" command, but the
>>> issue is why all the reads? It should be 99% writes.
> cp has to read something before it can write it elsewhere.
Ray, my bad, I should have specified, the cp reads from a different
volume/set of drives.
Thanks for the systemtap tip, Dave!
--Bart
next prev parent reply other threads:[~2011-03-03 0:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-02 20:09 [linux-lvm] Tracing IO requests? Bart Kus
2011-03-02 20:13 ` Jonathan Tripathy
2011-03-02 22:19 ` Bart Kus
2011-03-02 23:00 ` Dave Sullivan
2011-03-02 23:44 ` Ray Morris
2011-03-03 0:25 ` Bart Kus [this message]
2011-03-07 16:02 ` Frank Ch. Eigler
2011-03-07 18:06 ` Wendy Cheng
2011-03-03 10:29 ` Bryn M. Reeves
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=4D6EDFE0.2040905@bartk.us \
--to=me@bartk.us \
--cc=linux-lvm@redhat.com \
/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.