Hi Kyle and Greg, I will get back to you with more details tomorrow, thanks for the response.
Thanks, Guang 在 2013-10-22，上午9:37，Kyle Bader <kyle.ba...@gmail.com> 写道： > Besides what Mark and Greg said it could be due to additional hops through > network devices. What network devices are you using, what is the network > topology and does your CRUSH map reflect the network topology? > > On Oct 21, 2013 9:43 AM, "Gregory Farnum" <g...@inktank.com> wrote: > On Mon, Oct 21, 2013 at 7:13 AM, Guang Yang <yguan...@yahoo.com> wrote: > > Dear ceph-users, > > Recently I deployed a ceph cluster with RadosGW, from a small one (24 OSDs) > > to a much bigger one (330 OSDs). > > > > When using rados bench to test the small cluster (24 OSDs), it showed the > > average latency was around 3ms (object size is 5K), while for the larger > > one (330 OSDs), the average latency was around 7ms (object size 5K), twice > > comparing the small cluster. > > > > The OSD within the two cluster have the same configuration, SAS disk, and > > two partitions for one disk, one for journal and the other for metadata. > > > > For PG numbers, the small cluster tested with the pool having 100 PGs, and > > for the large cluster, the pool has 43333 PGs (as I will to further scale > > the cluster, so I choose a much large PG). > > > > Does my test result make sense? Like when the PG number and OSD increase, > > the latency might drop? > > Besides what Mark said, can you describe your test in a little more > detail? Writing/reading, length of time, number of objects, etc. > -Greg > Software Engineer #42 @ http://inktank.com | http://ceph.com > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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