From: Emmanuel Florac <eflorac@intellique.com>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-net@vger.kernel.org, Alan Piszcz <ap@solarrain.com>
Subject: Re: Supermicro X8DTH-6: Only ~250MiB/s from RAID<->RAID over 10GbE?
Date: Sat, 5 Feb 2011 21:45:50 +0100 [thread overview]
Message-ID: <20110205214550.3cb0f0d1@galadriel2.home> (raw)
In-Reply-To: <alpine.DEB.2.00.1102051427360.8518@p34.internal.lan>
Le Sat, 5 Feb 2011 14:35:52 -0500 (EST) vous écriviez:
> No single component is < 1Gbyte/sec but when data is transferred from
> hostA to hostB, then it degrades to 250MiB/s.
Running 2 Supermicro H8-DIi+ with 2378 Opteron, Intel 10 GigE CX4, 3Ware
RAID-6 24 drives : 550 MB/s reading sustained over NFS with 2.6.32.*
(plain vanilla kernel).
I know that Xeon used to suck IO wise, but this is surprising. Isn't
something preventing DMA ?
--
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Emmanuel Florac | Direction technique
| Intellique
| <eflorac@intellique.com>
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next prev parent reply other threads:[~2011-02-05 20:45 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-05 19:35 Supermicro X8DTH-6: Only ~250MiB/s from RAID<->RAID over 10GbE? Justin Piszcz
2011-02-05 19:42 ` Jean Gobin
2011-02-05 19:54 ` Justin Piszcz
2011-02-05 20:18 ` Justin Piszcz
2011-02-05 20:39 ` Stan Hoeppner
2011-02-05 20:45 ` Emmanuel Florac [this message]
2011-02-05 21:05 ` Justin Piszcz
2011-02-05 22:06 ` Dr. David Alan Gilbert
2011-02-05 22:30 ` Justin Piszcz
2011-02-05 22:56 ` Justin Piszcz
2011-02-05 23:54 ` Stan Hoeppner
2011-02-06 1:08 ` Justin Piszcz
2011-02-06 3:16 ` Stan Hoeppner
2011-02-06 10:16 ` Justin Piszcz
2011-02-06 13:46 ` Justin Piszcz
2011-02-06 16:44 ` Emmanuel Florac
2011-02-06 16:55 ` Zdenek Kaspar
2011-02-06 17:52 ` Justin Piszcz
2011-02-06 22:01 ` Stan Hoeppner
2011-02-07 3:59 ` Julian Calaby
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