Hi, I am correct that placement groups without data have no impact on the performance of a ceph cluster? Like in my case the pools data and rbd. Thanks for clarification. http://ceph.com/docs/master/rados/operations/pools/#create-a-pool When you create a pool, set the number of placement groups to a reasonable value (e.g., 100). Consider the total number of placement groups per OSD too. Placement groups are computationally expensive, so performance will degrade when you have many pools with many placement groups (e.g., 50 pools with 100 placement groups each). The point of diminishing returns depends upon the power of the OSD host. Regards Harry _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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