I have a program that monitors the speed, and I have seen 1TB/s pop up and there is just no way that is true. Probably the way it is calculated is prone to extreme measurements, where if you average it out you get a more realistic number.
On Tue, Sep 15, 2015 at 12:25 PM Mark Nelson <mnel...@redhat.com> wrote: > FWIW I wouldn't totally trust these numbers. At one point a while back > I had ceph reporting 226GB/s for several seconds sustained. While that > would have been really fantastic, I suspect it probably wasn't the case. ;) > > Mark > > On 09/15/2015 11:25 AM, Barclay Jameson wrote: > > Unfortunately, it's not longer idle as my CephFS cluster is now in > production :) > > > > On Tue, Sep 15, 2015 at 11:17 AM, Gregory Farnum <gfar...@redhat.com> > wrote: > >> On Tue, Sep 15, 2015 at 9:10 AM, Barclay Jameson > >> <almightybe...@gmail.com> wrote: > >>> So, I asked this on the irc as well but I will ask it here as well. > >>> > >>> When one does 'ceph -s' it shows client IO. > >>> > >>> The question is simple. > >>> > >>> Is this total throughput or what the clients would see? > >>> > >>> Since it's replication factor of 3 that means for every write 3 are > >>> actually written. > >>> > >>> First lets assume I have only one cephfs client writing data. > >>> > >>> If this is total throughput then to get the maximum throughput for > >>> what a client would see do I need to divide it by 3? > >>> > >>> Else, if this is what my client sees then do I need to multiply this > >>> by 3 to see what my maximum cluster throughput would be? > >> > >> I believe this is client-facing IO. It's pretty simple to check if > >> you've got an idle cluster; run rados bench and see if they're about > >> the same or about three times as large. ;) > >> -Greg > > _______________________________________________ > > ceph-users mailing list > > ceph-users@lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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