Good point. I have seen some really weird numbers something like 7x my normal client IO. This happens very rarely though. On Tue, Sep 15, 2015 at 2:25 PM, Mark Nelson <mnelson@xxxxxxxxxx> 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 <gfarnum@xxxxxxxxxx> >> wrote: >>> >>> On Tue, Sep 15, 2015 at 9:10 AM, Barclay Jameson >>> <almightybeeij@xxxxxxxxx> 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@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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