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
