Hi, Mario! Can you give more information about your cluster? Number of nodes, OSDs per node, HDD models etc? In general, you can use SSD as OSD journals ( http://irq0.org/articles/ceph/journal ), but it will give you performance boost on relatively small bursty workloads. If you'll just mix HDD and SSD in one pool it gives you nothing cause clients get ack when every single OSDs with involved PGs returned write ack only so in overal it means the slowest OSD drive timings. May be you can use SSD pool as a cache tier ( http://ceph.com/docs/master/rados/operations/cache-tiering/ ) but I've never tried it and read a number of complaines about it. I think somebody can comment it in a more informative way. Best regards, Vladimir 2015-07-21 6:08 GMT+05:00 Mario Codeniera <mario.codeniera@xxxxxxxxx>: > Hi, > > Can someone give an insights, if it possible to mixed SSD with HDD? on the > OSD. > > How can we speed up the uploading for file for example, as per experience it > took around 18mins to load 20Gb images (via glance), in 1Gb network. Or it > is just normal? > > > Regards, > Mario > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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