[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.


Hello,

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.

Regards,

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



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