From: Christian Herzog <horeizo@phys.ethz.ch>
To: Christoph Hellwig <hch@infradead.org>
Cc: xfs@oss.sgi.com
Subject: Re: XFS errors on large Infiniband fileserver setup
Date: Thu, 23 Sep 2010 13:52:46 +0200 [thread overview]
Message-ID: <5c4318884cb2c4d3983fd5231c2e4b17@phys.ethz.ch> (raw)
In-Reply-To: <20100923103802.GA16984@infradead.org>
> Yes, that could very well possible. While I'm not an expert on iSER it
> looks like it doesn't use the software crc32c checksums in iscsi over
> TCP but relies on the RDMA protocols guaranteeing it.
that would explain quite a lot actually. Thanks for the hint.
> Btw, what target do you use? According to
> http://www.spinics.net/lists/linux-stgt/msg02038.html it seems like the
> stgt iser target has some issues that look quite similar to yours.
we're using tgt which might have a similar problem.
As even IB over TCP is several times faster than our disks, we will now
proceed w/o iSER to have the system running and then experiment with
iSER on a test system.
thanks,
-Christian
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next prev parent reply other threads:[~2010-09-23 11:51 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 7:22 XFS errors on large Infiniband fileserver setup Christian Herzog
2010-09-23 10:01 ` Christian Herzog
2010-09-23 10:38 ` Christoph Hellwig
2010-09-23 11:52 ` Christian Herzog [this message]
2010-09-23 13:54 ` Christoph Hellwig
2010-09-23 14:10 ` Christian Herzog
2010-09-23 23:53 ` Dave Chinner
2010-09-24 5:41 ` Christian Herzog
2010-09-24 8:56 ` Stan Hoeppner
2010-09-24 13:19 ` Emmanuel Florac
2010-09-24 13:19 ` Emmanuel Florac
2010-09-27 5:49 ` Christian Herzog
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