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:[email protected]] On Behalf Of Marek Dohojda Sent: Monday, November 23, 2015 10:24 PM To: Haomai Wang Cc: [email protected] 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 <[email protected]<mailto:[email protected]>> wrote: On Tue, Nov 24, 2015 at 10:35 AM, Marek Dohojda <[email protected]<mailto:[email protected]>> wrote: > No SSD and SAS are in two separate pools. > > On Mon, Nov 23, 2015 at 7:30 PM, Haomai Wang > <[email protected]<mailto:[email protected]>> wrote: >> >> On Tue, Nov 24, 2015 at 10:23 AM, Marek Dohojda >> <[email protected]<mailto:[email protected]>> 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 >> > [email protected]<mailto:[email protected]> >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > >> >> >> >> -- >> Best Regards, >> >> Wheat > > -- Best Regards, Wheat
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