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From: "Rainer Shiz" <rainer.shiz@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: RAID Sync Speeds
Date: Mon, 22 May 2006 13:05:05 +0000	[thread overview]
Message-ID: <cf5433040605220605t22b6030j701add7d494c83e8@mail.gmail.com> (raw)

Hi,
    I have a general question on operating software RAIDs in linux.
    I am running md RAID in linux 2.6.12 kernel. I observed that the
sync speeds
were always much closer to /proc/sys/dev/raid/speed_limit_min value,
than
/proc/sys/dev/raid/speed_limit_max value. I agree that disk activity
(I/O) and
other system usage will bring down sync speeds. But I want sync speeds
to be
higher at whatever cost. So I thought I will just set max value to
around
500000 and leave the min at 5000. But with idle disk activity and
otherwise
idle system usage, I still see sync speeds around 5300Kb/s only.

So Is the 2.6 kernel designed to sync at speeds closer to min than max?

Please advise.

Please copy on your replies.

Thanks

             reply	other threads:[~2006-05-22 13:05 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-05-22 13:05 Rainer Shiz [this message]
2006-05-22 17:02 ` Chris Boot
2006-05-22 22:42 ` Neil Brown
2006-05-23  7:37   ` Rainer Shiz
2006-05-23 11:11     ` Neil Brown

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