From: Mikolaj Golub <to.my.trociny@gmail.com>
To: Eric Wong <e@80x24.org>
Cc: mogile@googlegroups.com, cmogstored-public@bogomips.org
Subject: Re: cmogstored 1.4.1: check: 2 of 107 tests failed on FreeBSD
Date: Mon, 8 Sep 2014 13:12:10 +0000 [thread overview]
Message-ID: <20140908131209.GC12577@gmail.com> (raw)
In-Reply-To: <20140907205004.GA31234@dcvr.yhbt.net>
On Sun, Sep 07, 2014 at 08:50:04PM +0000, Eric Wong wrote:
> I think averaging IO utilization across all unaccounted devices in
> mogstored is acceptable, since (I assume) it's common to have only
> one ZFS pool per host with multiple devices.
>
> I don't know much about ZFS or other LVM systems, but it probably tries
> to distribute load across devices internally, making per-physical device
> output less useful in the first place, right?
Yes.
With ZFS, `zpool iostat' is more useful in most of the cases than
iostat.
ref10-amd64:/home/trociny% zpool iostat 1 30
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
zroot 1.02T 793G 153 13 302K 27.8K
zroot 1.02T 793G 0 0 0 0
zroot 1.02T 793G 0 159 0 240K
zroot 1.02T 793G 0 0 0 0
^C
ref10-amd64:/home/trociny% zpool iostat -v 1 30
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
zroot 1.02T 793G 153 13 302K 27.8K
raidz1 1.02T 793G 153 13 302K 27.8K
ada0p3 - - 69 4 130K 13.1K
ada1p3 - - 66 3 125K 12.9K
ada2p3 - - 68 3 133K 13.1K
ada3p3 - - 66 3 126K 12.8K
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
zroot 1.02T 793G 0 0 0 0
raidz1 1.02T 793G 0 0 0 0
ada0p3 - - 0 0 0 0
ada1p3 - - 0 0 0 0
ada2p3 - - 0 0 0 0
ada3p3 - - 0 0 0 0
---------- ----- ----- ----- ----- ----- -----
^C
--
Mikolaj Golub
next prev parent reply other threads:[~2014-09-08 13:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-07 10:37 cmogstored 1.4.1: check: 2 of 107 tests failed on FreeBSD Mikolaj Golub
2014-09-07 10:55 ` Eric Wong
2014-09-07 13:44 ` Mikolaj Golub
2014-09-07 20:50 ` Eric Wong
2014-09-08 13:12 ` Mikolaj Golub [this message]
2014-09-09 6:49 ` Eric Wong
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