Hi, Thank you for your opinion. I don't know if RBD-NBD is supported by OpenStack since my environment is OpenStack. What file system do you use in your test for RBD and RBD-NBD?
Best regards, On Wed, Aug 31, 2016 at 10:11 PM, RDS <[email protected]> wrote: > 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, >
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