From: bart.coninckx@telenet.be
To: dm-devel@redhat.com
Subject: dd slow while reading on multipathing, writing is fast
Date: Tue, 8 Feb 2011 15:44:06 +0100 (CET) [thread overview]
Message-ID: <638331349.4388161297176246800.JavaMail.root@tendai.telenet-ops.be> (raw)
In-Reply-To: <315312316.4387891297176180905.JavaMail.root@tendai.telenet-ops.be>
Hi all,
something peculiar I cannot get my head round.
I have a setup where a backup server connects to iSCSI LUNs over multipathing.
While dd-ing to it, I get a spiffing 200 MB/sec, while reading it drops to 70 MB/sec. Local storage where I write the image onto is sufficiently fast.
Do you think this is multipathing related? I'm running the latest version from source.
Thx!
B.
next parent reply other threads:[~2011-02-08 14:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <315312316.4387891297176180905.JavaMail.root@tendai.telenet-ops.be>
2011-02-08 14:44 ` bart.coninckx [this message]
2011-02-09 11:03 ` dd slow while reading on multipathing, writing is fast Christophe Varoqui
2011-02-09 11:22 ` Bryn M. Reeves
2011-02-10 19:48 ` Bart Coninckx
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