On Mon, 2009-07-27 at 08:30 +0200, Coert Waagmeester wrote: > On Mon, 2009-07-27 at 10:18 +0400, Roman Savelyev wrote: > > > Invest in a HW RAID card with NVRAM cache that will negate the need > > > for barrier writes from the OS as the controller will issue them async > > > from cache allowing I/O to continue flowing. This really is the safest > > > method. > > It's a better way. But socket oprions in DRBD up to 8.2 (Nagel alghoritm) > > can decrease performance in large amount of small syncronius writes. > > > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > http://lists.centos.org/mailman/listinfo/centos > > Hello Roman, > > I am running drbd 8.2.6 (the standard centos version) > > How do I disable that nagle algorithm? On google I found the following page: http://www.nabble.com/Huge-latency-issue-with-8.2.6-td18947965.html I have found in the drbdsetup (8) man page the sndbuf-size option, and I will try setting this. On the nabble page they talk about the TCP_NODELAY and TCP_QUICKACK socket option. Does this have to do with Nagle algorithm? Where do I set these socket options? Do I have to compile drbd with them? > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos