Hi Stefan, We have been trying to optimize Glusterfs on our network and our results match your previous results. After reading your post, I tried removing AFR but our performances are still poor as compared to NFS (particulalrly for small files). Could you please post your new volume spec file and/or any other improvements that you made to any of the layers? That'll be very helpful. Thanks and regards Chandranshu > Date: Thu, 18 Sep 2008 10:47:22 +0200 > From: stefan at mdy.univie.ac.at (Stefan Boresch) > Subject: Re: Poor performance with AFR > To: gluster-users at gluster.org > Message-ID: <20080918084722.GH9860 at loop.mdy.univie.ac.at> > Content-Type: text/plain; charset=us-ascii > > Dear everyone, > > thank you for your replies. I have some additional data that have > clarified issues for me a bit: > > I have repeated my tests without AFR (basically replicating the plain > NFS setup) > > > > > CP-A MAKE > > > local disk < 5sec < 0.3sec > > > NFS (100MBit) 55sec+-2sec < 2sec > > > glusterfs (I) 4m29sec 17sec > > > glusterfs (II) 4m05sec 18sec > glusterfs w/o AFR 45+-2 sec 9sec <==NEW > > So, most of the poor performance is due to AFR. Note that the > copy actually is now faster than NFS. Interestingly, make > still runs much slower (although compared to the actual > compile time, this overhead should be negligible in practice) > > Also, upon running some NFS benchmarks between the two servers, I > noted some strange results, letting me suspect some creeping hardware > issues. > > So, I guess I'll (a) wait for glusterfs 1.4.x and (b) look out for > some better hardware to test things in the meantime. > > Sorry if I caused confusion; I should have checked some of these things > earlier. > > Best regards, > > Stefan Boresch > > -- > Stefan Boresch > Institute for Computational Biological Chemistry > University of Vienna, Waehringerstr. 17 A-1090 Vienna, Austria > Phone: -43-1-427752715 Fax: -43-1-427752790 > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://zresearch.com/pipermail/gluster-users/attachments/20080919/55d727c3/attachment.htm
