From: Tomasz Chmielewski <mangoo@wpkg.org>
To: "G. Richard Bellamy" <rbellamy@pteradigm.com>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: btrfs and iostat - how do I measure the live performance of my btrsf filesystems?
Date: Wed, 06 Aug 2014 01:39:22 +0200 [thread overview]
Message-ID: <40ee87d5d8b24230774bf28018ceb289@admin.virtall.com> (raw)
In-Reply-To: <CADw2B2MgvUt_bL11ZOAZjyk+R2pmM5JbLVjmgqoXBHSTEypMqw@mail.gmail.com>
On 2014-08-06 00:06, G. Richard Bellamy wrote:
> On Tue, Aug 5, 2014 at 7:14 AM, Tomasz Chmielewski <mangoo@wpkg.org>
> wrote:
>> Simple iostat won't give you meaningful live performance stats.
>>
>> You can combine it i.e. like below:
>>
>> iostat -x 1
>> iostat -mx 1
>> iostat -m 1
>
> Thanks for the pointer about viewing the extended stats, and showing
> them in MB rather than kB.
>
> Maybe I'm missing something here. I'm failing to see how adding those
> additional stats helps me get meaningful throughput information for a
> multi-device btrfs volume.
Well you won't see an aggregate, but you will see individual device
statistics with "1" at the end of iostat arguments (meaning, dump the
stats every second).
--
Tomasz Chmielewski
http://www.sslrack.com
next prev parent reply other threads:[~2014-08-05 23:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-05 14:14 btrfs and iostat - how do I measure the live performance of my btrsf filesystems? Tomasz Chmielewski
2014-08-05 22:06 ` G. Richard Bellamy
2014-08-05 23:39 ` Tomasz Chmielewski [this message]
2014-08-22 21:36 ` G. Richard Bellamy
2014-08-23 3:24 ` Duncan
2014-08-23 4:13 ` G. Richard Bellamy
-- strict thread matches above, loose matches on Subject: below --
2014-08-04 23:01 G. Richard Bellamy
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