Hi all, Will increase in the number of OSD will increase performance in ceph cluster? I mean to say, if ceph cluster is giving ~70MB/s with 3 OSD, will increasing OSD number to 5, increase the performance to ~100MB/s ? I have re-created my entire ceph cluster with CentOS 6.2 and kernel 3.2.11 and ceph 0.43. When i ran some tests, the results are far better than my first cluster results. But, they are not yet near to a normal linux machine or a entry level NetApp storage box. I have tested with cp, rsync, rm and dd commands. The performance what I am getting from ceph are not satisfactory (test with my actual work load is even worse). For instance, rsync of 10G directory took 84 mins to complete in Linux machine (in NetApp it was 89mins). But, the same rsync took like 10hrs to copy 10G of data. I work in a semiconductor company as a NAS admin. We use NetApp storage for all development and 99% we use NFS infrastrucure. So, I am trying to get some results from ceph which is at-least near to an entry level NetApp storage. I am pointing this bcz, when we call ceph as high performance storage, then it should perform better compared to any generic storage or a linux server. Let me know if there is any fine tune that i can do which can in turn increase the performance of the my ceph cluster. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
