On Thu, Sep 10, 2015 at 2:34 PM, Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx> wrote: > Hi, > > while we're happy running ceph firefly in production and also reach > enough 4k read iop/s for multithreaded apps (around 23 000) with qemu 2.2.1. > > We've now a customer having a single threaded application needing around > 2000 iop/s but we don't go above 600 iop/s in this case. > > Any tuning hints for this case? If the application really wants 2000 sync IOPS to disk without any parallelism, I don't think any network storage system is likely to satisfy him — that's only half a millisecond per IO. 600 IOPS is about the limit of what the OSD can do right now (in terms of per-op speeds), and although there is some work being done to improve that it's not going to be in a released codebase for a while. Or perhaps I misunderstood the question? _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |