[DRBD-user] Mixing EM64T and X86?

[H.D.]

On 09.04.2007 22:51, Lars Ellenberg wrote:
> the drbd network protocol is "clean",
> in the sense of well defined for endianess and data type sizes.
> it is no problem mixing different architechtures on the nodes.

I upgraded one of two boxes in the cluster from X86 to EM64T, I kept all 
config. While the disconnected performance is quite similar, as soon as 
I connect the both, performance is horrible. Horrible means I cannot get 
10% of what I had before. Usually DRBD overhead was negligible (under 
5%), now it unacceptable.

Both machines show almost no CPU and low disk i/o, What are they waiting 
for? How can I debug that? The communication path between the two seems 
as always:

iperf
[  3]  0.0-10.0 sec  2.29 GBytes  1.97 Gbits/sec

(2 Bonded Intel Gbits)

How can I debug that?

Thanks in advance.


-- 
Regards,
H.D.