The tests are pretty clearly using different op sizes there. I believe the default is 16*4MB, but the first one is using 32*4KB. So obviously the curves are very different! On Mon, Feb 5, 2018 at 6:47 AM Steven Vacaroaia <ste...@gmail.com> wrote:
> Hi, > > I noticed a severe inverse correlation between IOPS and throughput > > For example: > > running rados bench write with t=32 shows and average IOPS 1426 > and bandwidth 5.5 MB/sec > > running it with default ( t = 16 ) average IOPS is 49 and bandwidth is 200 > MB/s > > Is this expected behavior ? > How do I increase bandwidth without impacting IOPS ? > > Note > > Nothing "red" on atop > No customization in ceph.conf or sysctl.conf > > The test I ran using replication = 2 and only 2 OSD s > > Steven > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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