From: KELEMEN Peter <Peter.Kelemen@cern.ch>
To: linux-raid@vger.kernel.org
Subject: Re: /proc/partitions
Date: Mon, 20 Dec 2004 12:49:39 +0100 [thread overview]
Message-ID: <20041220114939.GA20243@inara.maison.net> (raw)
In-Reply-To: <Pine.LNX.4.56.0412201046050.4389@lion.drogon.net>
* Gordon Henderson (gordon@drogon.net) [20041220 10:50]:
> Is there any plans to make the entries in /proc/partitions
> return anything sensible for the md devices?
AFACT not. Current consensus is that md devices don't do I/O,
they only dispatch I/O to lower layer devices, hence no stats.
(OTOH, I personally was in a situation at least once when it
would have been very useful -- regardless of the obvious double
accounting.)
> If not, is there any other way to get some stats on reading &
> writing each md device?
Parse /proc/mdstat and cook up your own stat counters based on the
md member devices' stats.
Peter
PS: 2.6.x same thing
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Kelemen Péter / \ / \ Peter.Kelemen@cern.ch
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next prev parent reply other threads:[~2004-12-20 11:49 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <037401c4cf3b$ee75bc90$030a0a0a@musicroom>
2004-11-21 4:33 ` Good news / bad news - The joys of RAID Guy
2004-11-22 14:13 ` Yu Chen
2004-11-22 14:34 ` Gordon Henderson
2004-11-22 15:52 ` Good news / bad news - The joys of RAID - backups Alvin Oga
2004-11-22 17:56 ` Guy
2004-11-22 18:29 ` Alvin Oga
2004-11-22 19:48 ` Guy
2004-11-22 17:51 ` Good news / bad news - The joys of RAID Guy
2004-11-22 23:26 ` Gordon Henderson
2004-11-22 23:48 ` Guy
2004-11-23 0:09 ` Måns Rullgård
2004-11-23 15:33 ` Gordon Henderson
2004-11-23 0:17 ` berk walker
2004-11-23 9:24 ` Robin Bowes
2004-11-23 12:31 ` Bob Hillegas
2004-11-23 13:00 ` berk walker
2004-12-20 10:50 ` /proc/partitions Gordon Henderson
2004-12-20 11:49 ` KELEMEN Peter [this message]
2004-12-20 12:32 ` /proc/partitions Gordon Henderson
2004-12-20 22:26 ` /proc/partitions Neil Brown
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