From: ales-76@seznam.cz
To: ceph-devel@lists.sourceforge.net
Cc: "Craig Dunwoody" <cdunwoody@graphstream.com>
Subject: Re: Hardware-config suggestions for HDD-based OSD node?
Date: Mon, 29 Mar 2010 07:18:00 +0200 (CEST) [thread overview]
Message-ID: <3500.484.564-14914-1325373445-1269839880@seznam.cz> (raw)
In-Reply-To: <23450.1269815817@n20.hq.graphstream.com>
> ------------ Původní zpráva ------------
> Od: Craig Dunwoody <cdunwoody@graphstream.com>
> Předmět: [ceph-devel] Hardware-config suggestions for HDD-based OSD node?
> Datum: 29.3.2010 00:37:56
> As number of attached HDDs increases, I would expect to hit a number of
> hardware and software resource limitations in the node. Certainly the
> achievable sustained throughput of the lowest-level hardware interfaces
> would be only a fraction of the aggregate-peak numbers that I listed
> above.
As to the number of disks, Sun Fire X4500 with 48 SATA disks showed real-world performance around 800-1000 MB/s (benchmarks on the web - iSCSI, no Ceph). Since it is a amd64 based I guess you can get similar I/O rates from any Intel box on the market today, provided you have enough SATA ports and/or PCI-E slots. One 10gbps NIC should be enough (these are usually two ported anyway). I would say the Linux will not be the bottleneck here even if you use software RAID. Usually it is the network or the protocol that limit the performance.
Regards
Aleš Bláha
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next prev parent reply other threads:[~2010-03-29 5:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-28 22:36 Hardware-config suggestions for HDD-based OSD node? Craig Dunwoody
2010-03-29 0:29 ` Martin Millnert
2010-03-29 1:15 ` Gregory Farnum
2010-03-29 1:48 ` Craig Dunwoody
2010-03-29 5:18 ` ales-76 [this message]
2010-03-29 13:00 ` Craig Dunwoody
2010-03-29 15:46 ` Aleš Bláha
2010-03-29 22:05 ` [OLD ceph-devel] " Craig Dunwoody
2010-03-29 21:26 ` Sage Weil
2010-03-29 22:54 ` Craig Dunwoody
2010-03-29 0:58 Craig Dunwoody
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