From: Mark Nelson <mark.nelson@inktank.com>
To: Gandalf Corvotempesta <gandalf.corvotempesta@gmail.com>
Cc: martin@tuxadero.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 17:12:52 -0600 [thread overview]
Message-ID: <509AEAF4.30309@inktank.com> (raw)
In-Reply-To: <CAJH6TXjqMc3mOU7LLPW2oPp+jTC_V_r=JtRU2bGEmtH4vdb3ag@mail.gmail.com>
On 11/07/2012 04:51 PM, Gandalf Corvotempesta wrote:
> 2012/11/7 Martin Mailand <martin@tuxadero.com>:
>> But it looks good on paper, so it's definitely a try worth.
>
> is at least 4x times faster than 10gbe and AFAIK should have a lower latency.
> I'm planning to use infiniband as backend storage network, used for
> OSD replication. 2 HBA for each OSD should give me 80Gbps and full
> redundancy
>
I haven't done much with IPoIB (just RDMA), but my understanding is that
it tends to top out at like 15Gb/s. Some others on this mailing list
can probably speak more authoritatively. Even with RDMA you are going
to top out at around 3.1-3.2GB/s.
This thread may be helpful/interesting:
http://comments.gmane.org/gmane.linux.drivers.rdma/12279
Mark
next prev parent reply other threads:[~2012-11-07 23:12 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
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 [this message]
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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