[CentOS] DRBD very slow....

Mon Jul 27 06:50:30 UTC 2009
John R Pierce <pierce at hogranch.com>

> 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?

those are socket flags set on a socket open() call.    the page you 
refer to specifically says they changed this in 8.2.7