Hello, I've checked with a MegaRaid SAS 2208, then I get ~40 MB/s, both with a 1.9TB and a 240GB SM863 model. So it seems the LSI MegaRaid HBA's is not optimized for a lot of single job IOPS... Which raises for me the question, do we know more about HBAs suitable high performance ceph, in a previous post on this list I see the people praising the SAS3008 CPU, but does anybody know if there are any test/metrics in out there. Regards, Mart On 12/23/2015 10:20 PM, Alex Moore wrote: > As another data point, I recently bought a few 240GB SM863s, and found > I was getting 79 MB/s on the single job test. > > In my case the SSDs are running off the onboard Intel C204 chipset's > SATA controllers on a couple of systems with single Xeon E3-1240v2 CPUs. > > Alex > > On 23/12/2015 6:39 PM, Lionel Bouton wrote: >> Le 23/12/2015 18:37, Mart van Santen a écrit : >>> So, maybe you are right and is the HBA the bottleneck (LSI Logic / >>> Symbios Logic MegaRAID SAS 2108). Under all cirumstances, I do not get >>> close to the numbers of the PM863 quoted by Sebastien. But his site >>> does not state what kind of HBA he is using.. >> In fact I was the one doing those tests and I added the relevant >> information in the comments (Disqus user Gyver): the PM863 tested is >> connected to the Intel C612 chipset SATA ports (configured as AHCI) of a >> dual Xeon E5v3 board, so this is a purely SATA configuration. >> >> Best regards, >> >> Lionel >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Mart van Santen Greenhost E: mart@xxxxxxxxxxxx T: +31 20 4890444 W: https://greenhost.nl A PGP signature can be attached to this e-mail, you need PGP software to verify it. My public key is available in keyserver(s) see: http://tinyurl.com/openpgp-manual PGP Fingerprint: CA85 EB11 2B70 042D AF66 B29A 6437 01A1 10A3 D3A5
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