From: Alasdair G Kergon <agk@redhat.com>
To: Dennis Birkholz <dennis.birkholz@rwth-aachen.de>
Cc: dm-crypt@saout.de
Subject: Re: [dm-crypt] Poor write performance on software raid with 512k chunk size
Date: Sun, 26 Feb 2012 13:37:29 +0000 [thread overview]
Message-ID: <20120226133729.GA22224@agk-dp.fab.redhat.com> (raw)
In-Reply-To: <4F4A25AB.7040003@rwth-aachen.de>
As we've mentioned to others, try increasing
/sys/block/<devices>/queue/nr_requests
significantly (e.g. see if 50,000 has any impact).
Or experiment with these patches:
http://people.redhat.com/mpatocka/patches/kernel/dm-crypt-paralelizace/current/
(at your own risk, of course).
Alasdair
next prev parent reply other threads:[~2012-02-26 13:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-26 12:29 [dm-crypt] Poor write performance on software raid with 512k chunk size Dennis Birkholz
2012-02-26 13:37 ` Alasdair G Kergon [this message]
2012-02-26 16:45 ` Dennis Birkholz
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