On Mon, 2009-07-27 at 12:37 +0200, Coert Waagmeester wrote: > On Mon, 2009-07-27 at 12:02 +0200, Alexander Dalloz wrote: > > > > > > On Mon, 2009-07-27 at 08:30 +0200, Coert Waagmeester wrote: > > > > >> Hello Roman, > > >> > > >> I am running drbd 8.2.6 (the standard centos version) > > > > > > Hi, > > > > have you considered to test the drbd-8.3 packages? > > > > http://bugs.centos.org/view.php?id=3598 > > > > http://dev.centos.org/centos/5/testing/{i386,x86_64}/RPMS/ > > > > Best regards > > > > Alexander > > > > > > > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > http://lists.centos.org/mailman/listinfo/centos > > Thank you very much for this tip! It was one very obvious place where I > did not look yet. > > > Would it be necessary to still recompile it for the TCP_NODELAY and > such? > > I am just making sure, because > http://www.nabble.com/Huge-latency-issue-with-8.2.6-td18947965.html > makes it seem unnecessary. > > Why do the repositories provide both DRBD 8.0.x and 8.2.6? > > Thank you all again, > Coert > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos Hello all, Here is a status update.... _______________________________________________________________________________ on both hosts I now run from the testing repository: # rpm -qa | grep drbd drbd83-8.3.1-5.el5.centos kmod-drbd83-xen-8.3.1-4.el5.centos _______________________________________________________________________________ Here is my config (slightly condensed): ----------------------------------------------------- global { usage-count yes; } common { protocol C; syncer { rate 50M; } net { # allow-two-primaries; } sndbuf-size 0; } # disk {no-disk-flushes; # no-md-flushes; } startup { wfc-timeout 0 ; } } resource xenfilesrv { device /dev/drbd1; disk /dev/vg0/xenfilesrv; meta-disk internal; on baldur.mydomain.local { address 10.99.99.1:7788; } on thor.mydomain.local { address 10.99.99.2:7788; } } resource xenfilesrvdata { device /dev/drbd2; disk /dev/vg0/xenfilesrvdata; meta-disk internal; on baldur.mydomain.local { address 10.99.99.1:7789; } on thor.mydomain.local { address 10.99.99.2:7789; } } _______________________________________________________________________________ xenfilesrv is a xen domU in this domU i ran a dd with oflag direct: --------------------------------------------------------- # dd if=/dev/zero of=1gig.file bs=1M count=1000 oflag=direct 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 147.997 seconds, 7.1 MB/s Just before I ran the dd this popped up in the secondary hosts syslog: ---------------------------------------------------------------------- Jul 27 21:51:42 thor kernel: drbd2: Method to ensure write ordering: flush Jul 27 21:51:42 thor kernel: drbd1: Method to ensure write ordering: flush _______________________________________________________________________________ What more can I try? To be quite honest, I have no idea what to do with/ where to find the TCP_NODELAY socket options...... Kind regards, Coert