Nothing changes afer reformating to xfs. Random freezes in write to existing file from VM (from host everything is ok) :( gluster version 3.3.1 qemu version 1.0 2013/3/2 Joe Julian <joe at julianfamily.org> > The kernel developers introduced a bug into ext4 that has yet to be > fixed. If you use xfs you won't have those hangs. > > > On 03/01/2013 01:30 AM, Nikita A Kardashin wrote: > > Hello again! > > I am complete rebuild my storage. > As base: ext4 over mdadm-raid1 > Gluster volume in distributed-replicated mode with settings: > > Options Reconfigured: > performance.cache-size: 1024MB > nfs.disable: on > performance.write-behind-window-size: 4MB > performance.io-thread-count: 64 > features.quota: off > features.quota-timeout: 1800 > performance.io-cache: on > performance.write-behind: on > performance.flush-behind: on > performance.read-ahead: on > > As result, I got write performance about 80MB/s on dd if=/dev/zero > of=testfile.bin bs=100M count=10, but I also got some strange things. > If I try to execute above command inside virtual machine (KVM), first time > all going right - about 900MB/s (cache effect, I think), but if I run this > test again on existing file - task (dd) hungs up and can be stopped only by > Ctrl+C. > > Overall virtual system latency is poor too. For example, apt-get upgrade > upgrading system very, very slow, freezing on "Unpacking replacement" and > other io-related steps. > > Does glusterfs have any tuning options, that can help me? > > > 2013/2/27 Brian Candler <B.Candler at pobox.com> > >> On Wed, Feb 27, 2013 at 02:46:28PM +0000, Robert van Leeuwen wrote: >> > You could try to trunk the network on your client but 10Gbit ethernet ( >> i suggest to use fiber, because of latency issues with copper 10Gbit) >> >> Aside: 10G with SFP+ direct-attach cables also works well, even though >> it's >> copper. The latency problem is with 10Gbase-T (RJ45 / CAT6(a)) >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users at gluster.org >> http://supercolony.gluster.org/mailman/listinfo/gluster-users >> > > > > -- > With best regards, > differentlocal (www.differentlocal.ru | differentlocal at gmail.com), > System administrator. > > > _______________________________________________ > Gluster-users mailing listGluster-users at gluster.orghttp://supercolony.gluster.org/mailman/listinfo/gluster-users > > > > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://supercolony.gluster.org/mailman/listinfo/gluster-users > -- With best regards, differentlocal (www.differentlocal.ru | differentlocal at gmail.com), System administrator. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://supercolony.gluster.org/pipermail/gluster-users/attachments/20130304/ceaf3df0/attachment.html>
