From: Mike Snitzer <snitzer@redhat.com>
To: Jon Bernard <jbernard@tuxion.com>
Cc: dm-devel@redhat.com
Subject: Re: poor thin performance, relative to thick
Date: Fri, 15 Jul 2016 14:59:07 -0400 [thread overview]
Message-ID: <20160715185906.GA29580@redhat.com> (raw)
In-Reply-To: <20160714042122.GB24221@helmut>
On Thu, Jul 14 2016 at 12:21am -0400,
Jon Bernard <jbernard@tuxion.com> wrote:
> Do you have any intuition on where to start looking?
Joe asked me a very basic/obvious question: is block zeroing enabled?
(block zeroing is enabled by default -- you have to know to disable it)
If zeroing wasn't disabled that could explain some of the sizable
performance differences. Please use/test the 'skip_block_zeroing'
feature if you aren't already (also see the "Zeroing' section of the
'lvmthin' manpage).
Mike
next prev parent reply other threads:[~2016-07-15 18:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-11 20:44 poor thin performance, relative to thick Jon Bernard
2016-07-12 8:28 ` Jack Wang
2016-07-13 3:29 ` Jon Bernard
2016-07-13 14:17 ` Mike Snitzer
2016-07-12 8:30 ` Zdenek Kabelac
2016-07-13 4:00 ` Jon Bernard
2016-07-12 18:46 ` Mike Snitzer
2016-07-14 4:21 ` Jon Bernard
2016-07-14 20:58 ` Mike Snitzer
2016-07-15 18:59 ` Mike Snitzer [this message]
2016-07-15 20:57 ` Jon Bernard
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=20160715185906.GA29580@redhat.com \
--to=snitzer@redhat.com \
--cc=dm-devel@redhat.com \
--cc=jbernard@tuxion.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.