Dear Marek, I would expect a higher performance, but did you measure this? with rados bench? Please note, ceph is build for parallel access, so the combined speed increases with more threads, if this is a single thread measurement, I wonder how well it reflects the performance of the platform. With rados bench you can specify how many threads you want to use.
Regards, Mart On 11/24/2015 04:37 PM, Marek Dohojda wrote: > Yeah they are, that is one thing I was planning on changing, What I am > really interested at the moment, is vague expected performance. I > mean is 100MB around normal, very low, or "could be better"? > > On Tue, Nov 24, 2015 at 8:02 AM, Alan Johnson <al...@supermicro.com > <mailto:al...@supermicro.com>> wrote: > > Are the journals on the same device – it might be better to use > the SSDs for journaling since you are not getting better > performance with SSDs? > > > > *From:*ceph-users [mailto:ceph-users-boun...@lists.ceph.com > <mailto:ceph-users-boun...@lists.ceph.com>] *On Behalf Of *Marek > Dohojda > *Sent:* Monday, November 23, 2015 10:24 PM > *To:* Haomai Wang > *Cc:* ceph-users@lists.ceph.com <mailto:ceph-users@lists.ceph.com> > *Subject:* Re: [ceph-users] Performance question > > > > Sorry I should have specified SAS is the 100 MB :) , but to be > honest SSD isn't much faster. > > > > On Mon, Nov 23, 2015 at 7:38 PM, Haomai Wang <haomaiw...@gmail.com > <mailto:haomaiw...@gmail.com>> wrote: > > On Tue, Nov 24, 2015 at 10:35 AM, Marek Dohojda > <mdoho...@altitudedigital.com > <mailto:mdoho...@altitudedigital.com>> wrote: > > No SSD and SAS are in two separate pools. > > > > On Mon, Nov 23, 2015 at 7:30 PM, Haomai Wang > <haomaiw...@gmail.com <mailto:haomaiw...@gmail.com>> wrote: > >> > >> On Tue, Nov 24, 2015 at 10:23 AM, Marek Dohojda > >> <mdoho...@altitudedigital.com > <mailto:mdoho...@altitudedigital.com>> wrote: > >> > I have a Hammer Ceph cluster on 7 nodes with total 14 OSDs. > 7 of which > >> > are > >> > SSD and 7 of which are SAS 10K drives. I get typically about > 100MB IO > >> > rates > >> > on this cluster. > > So which pool you get with 100 MB? > > > >> > >> You mixed up sas and ssd in one pool? > >> > >> > > >> > I have a simple question. Is 100MB within my configuration > what I > >> > should > >> > expect, or should it be higher? I am not sure if I should be > looking for > >> > issues, or just accept what I have. > >> > > >> > _______________________________________________ > >> > ceph-users mailing list > >> > ceph-users@lists.ceph.com <mailto:ceph-users@lists.ceph.com> > >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> > > >> > >> > >> > >> -- > >> Best Regards, > >> > >> Wheat > > > > > > > -- > Best Regards, > > Wheat > > > > > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Mart van Santen Greenhost E: m...@greenhost.nl 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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