Hi all, I am currently benchmarking a standard setup with Intel DC S3700 disks as journals and Hitachi 4TB-disks as data-drives, all on LACP 10GbE network.
The size of my journals are 25GB each, and I have two journals per machine, with 5 OSDs per journal, with 5 machines in total. We currently use the tunables optimal and the version of ceph is the latest dumpling. Benchmarking writes with rbd show that there's no problem hitting upper levels on the 4TB-disks with sequential data, thus maxing out 10GbE. At this moment we see full utilization on the journals. But lowering the byte-size to 4k shows that the journals are utilized to about 20%, and the 4TB-disks 100%. (rados -p <pool> -b 4096 -t 256 100 write) I am in the process of debugging this and wonder how it's best to proceed. Cheers, Josef _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
