In my testing, using RBD-NBD is faster than using RBD or CephFS. For a MySQL/sysbench test using 25 threads using OLTP, using a 40G network between the client and Ceph, here are some of my results: Using ceph-rbd: transactions per sec: 8620 using ceph rbd-nbd: transaction per sec: 9359 using cephfs: transactions per sec: 7550 Rick > On Aug 31, 2016, at 10:59 AM, Lazuardi Nasution <[email protected]> > wrote: > > Hi, > > I'm looking for pros and cons of mounting /var/lib/mysql with CephFS or RBD > for getting best performance. MySQL save data as files on mostly > configuration but the I/O is block access because the file is opened until > MySQL down. This case give us both options for storing the data files. For > RBD pros, please suggest the file system should be formatted on the mounted > volume. > > Actually this case can happen on any database which stores the data as files. > > Best regards, > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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