Hi Douglas, It's not clear whether you used SSD journals for the OSDs in the base config (or in the backing pool for the tiered tests) - it looks like not? If that's the case then I don't think this provides the most interesting point of comparison, because the tests are write-latency sensitive you'd naturally expect SSD journals to make a lot of difference and would surely start with those in the base config. I'm interested in how a similar setup would perform compared to regular journaling and Ceph tiering all on the server-side, e.g., dm-cache (or bcache) based OSDs - apparently a bunch of people do this in the wild with success, but AFAIK there has never been any detailed benchmarking published. Cheers, On 3 November 2015 at 05:09, Douglas Fuller <dfuller@xxxxxxxxxx> wrote: > I’ve published a whitepaper detailing configuration and benchmark results using SysBench MySQL on top of RBD with dm-cache. Results using a Ceph cache tier are also included. Questions, comments, criticism, nitpicking, and/or discussion are welcome. > > http://tracker.ceph.com/projects/ceph/wiki/Ceph_and_dm-cache_for_Database_Workloads > > —Doug-- > 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 -- Cheers, ~Blairo -- 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
