No way in 8.2 It's a socket option, managed well in 8.3 and later releases. If you don't hav large amount of very small syncronius writes, you don't need it. ----- Original Message ----- From: "Coert Waagmeester" <lgroups at waagmeester.co.za> To: "CentOS mailing list" <centos at centos.org> Sent: Monday, July 27, 2009 10:30 AM Subject: Re: [CentOS] DRBD very slow.... > > 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? > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >