Re: Ceph cluster with SSDs

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Hello,

On Fri, 18 Aug 2017 00:00:09 +0200 Mehmet wrote:

> Which ssds are used? Are they in production? If so how is your PG Count?
>
What he wrote.
W/o knowing which apples you're comparing to what oranges, this is
pointless.

Also testing osd bench is the LEAST relevant test you can do, as it only
deals with local bandwidth, while what people nearly always want/need in
the end is IOPS and low latency.
Which you test best from a real client perspective.

Christian
 
> Am 17. August 2017 20:04:25 MESZ schrieb M Ranga Swami Reddy <swamireddy@xxxxxxxxx>:
> >Hello,
> >I am using the Ceph cluster with HDDs and SSDs. Created separate pool
> >for each.
> >Now, when I ran the "ceph osd bench", HDD's OSDs show around 500 MB/s
> >and SSD's OSD show around 280MB/s.
> >
> >Ideally, what I expected was - SSD's OSDs should be at-least 40% high
> >as compared with HDD's OSD bench.
> >
> >Did I miss anything here? Any hint is appreciated.
> >
> >Thanks
> >Swami
> >_______________________________________________
> >ceph-users mailing list
> >ceph-users@xxxxxxxxxxxxxx
> >http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com  


-- 
Christian Balzer        Network/Systems Engineer                
chibi@xxxxxxx   	Rakuten Communications
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