[DRBD-user] DRBD/8.3.6 with O_SYNC, write performance and latency issues.

Christian Balzer chibi at gol.com
Fri Jan 22 02:23:54 CET 2010

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On Thu, 21 Jan 2010 16:18:01 -0500 Norman Sardella wrote:

> I was able to address my performance/latency issues
> by putting drbd/network/disk interrupts on the same CPU.
This is very interesting, what kind of CPUs are you using and did 
you limit that to one core or multiple cores on one CPU?
I would expect the penalty for multiple cores on the same Opteron CPU 
to be less than the 70us you saw, but I am no AMD CPU designer. ^.^
My fear of doing something like this would be to run out of steam
on that core when things get busy.


Christian Balzer        Network/Systems Engineer                
chibi at gol.com   	Global OnLine Japan/Fusion Communications

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