From: Stefan Priebe <s.priebe@profihost.ag>
To: martin@tuxadero.com
Cc: Gandalf Corvotempesta <gandalf.corvotempesta@gmail.com>,
Mark Nelson <mark.nelson@inktank.com>,
"Atchley, Scott" <atchleyes@ornl.gov>,
Sage Weil <sage@inktank.com>,
"ceph-devel@vger.kernel.org" <ceph-devel@vger.kernel.org>
Subject: Re: SSD journal suggestion
Date: Wed, 07 Nov 2012 22:59:03 +0100 [thread overview]
Message-ID: <509AD9A7.5070208@profihost.ag> (raw)
In-Reply-To: <509AD8CA.3080502@tuxadero.com>
Am 07.11.2012 22:55, schrieb Martin Mailand:
> Hi Stefan,
>
> deep buffers means latency spikes, you should go for fast switching
> latency. The HP5900 has a latency of 1ms, the Arista and Mellanox of 250ns.
HP told me they all use the same ships and Arista measures latency while
only one port is in use. HP guarentees the latency when all ports are in
use. If this is correct or just somehing hp told me - i don't know. They
told me the arista is slower and the statistics are not comporable...
> And I you should think at the price the HP5900 cost 3 times of the
> Mellanox.
Don't know what the Mellanox coests. I get the HP for a really good
price below 10.000 €.
Greets,
Stefan
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next prev parent reply other threads:[~2012-11-07 21:59 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-07 12:13 SSD journal suggestion Gandalf Corvotempesta
2012-11-07 12:17 ` Sage Weil
2012-11-07 12:28 ` Gandalf Corvotempesta
2012-11-07 15:01 ` Mark Nelson
2012-11-07 16:12 ` Atchley, Scott
2012-11-07 16:20 ` Mark Nelson
2012-11-07 16:35 ` Atchley, Scott
2012-11-07 16:41 ` Mark Nelson
2012-11-07 21:11 ` Martin Mailand
2012-11-07 21:14 ` Gandalf Corvotempesta
2012-11-07 21:35 ` Martin Mailand
2012-11-07 21:44 ` Stefan Priebe
2012-11-07 21:55 ` Martin Mailand
2012-11-07 21:59 ` Stefan Priebe [this message]
2012-11-07 22:13 ` Martin Mailand
2012-11-07 22:28 ` Gandalf Corvotempesta
2012-11-07 22:39 ` Martin Mailand
2012-11-07 22:51 ` Gandalf Corvotempesta
2012-11-07 23:12 ` Mark Nelson
2012-11-08 8:22 ` Gandalf Corvotempesta
2012-11-08 13:55 ` Atchley, Scott
2012-11-08 14:39 ` Mark Nelson
2012-11-08 15:00 ` Atchley, Scott
2012-11-08 15:02 ` Atchley, Scott
2012-11-08 16:19 ` Andrey Korolyov
2012-11-08 18:03 ` Atchley, Scott
2012-11-08 20:12 ` Joseph Glanville
2012-11-08 21:21 ` SSD journal suggestion / rsockets Dieter Kasper
2012-11-08 22:00 ` Joseph Glanville
2012-11-09 14:43 ` Atchley, Scott
2012-11-09 23:41 ` Joseph Glanville
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