Hi Gencer, On Mon, Jul 17, 2017 at 12:31 PM, <gencer@xxxxxxxxxxxxx> wrote: > I located and applied almost every different tuning setting/config over the > internet. I couldn’t manage to speed up my speed one byte further. It is > always same speed whatever I do. I believe you're frustrated but this type of information isn't really helpful. Instead tell us which config settings you've tried tuning. > I have 2 nodes with 10 OSD each and each OSD is 3TB SATA drive. Each node > has 24 cores and 64GB of RAM. Ceph nodes are connected via 10GbE NIC. No > FUSE used. But tried that too. Same results. > > > > $ dd if=/dev/zero of=/mnt/c/testfile bs=100M count=10 oflag=direct This looks like your problem: don't use oflag=direct. That will cause CephFS to do synchronous I/O at great cost to performance in order to avoid buffering by the client. -- Patrick Donnelly _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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