Hi Maged Thanks for your reply.
> 6k is low as a max write iops value..even for single client. for cluster > of 3 nodes, we see from 10k to 60k write iops depending on hardware. > > can you increase your threads to 64 or 128 via -t parameter I can absolutely get it higher by increasing the parallism. But I may have missed to explain my purpuse - I'm intested in how close to putting local SSD/NVMe in servers I can get with RDB. Thus putting parallel scenarios that I would never see in production in the tests does not really help my understanding. I think a concurrency level of 16 is in the top of what I would expect our PostgreSQL databases to do in real life. > can you run fio with sync=1 on your disks. > > can you try with noop scheduler > > what is the %utilization on the disks and cpu ? > > can you have more than 1 disk per node I'll have a look at that. Thanks for the suggestion. Jesper _______________________________________________ ceph-users mailing list firstname.lastname@example.org http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com