From: rabbit@rabbit.us (Peter Rabbitson)
To: linux-raid@vger.kernel.org
Subject: swap on raid
Date: Thu, 1 Mar 2007 17:27:40 -0500 [thread overview]
Message-ID: <20070301222739.GA4835@rabbit.us> (raw)
Hi,
I need to use a raid volume for swap, utilizing partitions from 4
physical drives I have available. From my experience I have three
options - raid5, raid10 with 2 offset chunks, and two raid 1 volumes
that are swapon-ed with equal priority. However I have a hard time
figuring out what to use as I am not really sure how can I detect the
usage patterns of swap, left alone benchmark it. Has anyone done
anything like this, or is there information on what kind of reads/writes
the kernel performs when paging in and out?
Before you answer my question - yes, I am painfully aware of the
paradigm "swap on raid is bad", and I know there are other ways to solve
it, but my situation requires me to have swap. Several weeks ago a drive
failed and took a full partition away bringing the system to its knees
and causied massive data corruption. I am also aware that I can use a
file that will reside alongside my other data, but fragmentation makes
this approach inefficient. So I am looking into placing the swap
directly on a raid voulme.
Thanks
Peter
next reply other threads:[~2007-03-01 22:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-01 22:27 Peter Rabbitson [this message]
2007-03-01 22:30 ` swap on raid Justin Piszcz
2007-03-01 23:07 ` Richard Scobie
2007-03-01 23:34 ` Peter Rabbitson
2007-03-02 4:45 ` Mark Hahn
2007-03-01 23:24 ` Bill Davidsen
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