[ceph-users] Some slow writes over time

I am running a simple workload (just 1 client and 1 file) of random writings on Ceph FS and I noticed that approximately 3% of the operations (well spread over time) show latencies higher than the other 97% (100 ms x 10 ms). Is there any reason for this to happen? - I'm using fio with O_DIRECT

[ceph-users] Deleterious effects OSD queue

Hi folks, Regarding OSD operation queues (shards), I found this in the documentation (https://docs.ceph.com/docs/master/rados/configuration/osd-config-ref/): "A lower number of shards will increase the impact of the mClock queues, but may have other deleterious effects". What are these delete

[ceph-users] OSD Shard processing operations slowly

Hi, I'm running FIO benchmark to test my simple cluster (3 OSD's, 128 pg's - using Nautilus - v14.2.10) and after certain load of clients performing random read operations, the OSDs show very different performances in terms of op latency. In extreme cases there is an OSD that performs much wor