[DRBD-user] link aggregate ( bonding module )

[Daniel Bourque]

Hi,

    My disk writes are benching 2x faster than the GigE dedicated link 
connecting the DRBD nodes.

[root at host1 ]# ./Bonnie -s 1000 -d /var/tmp/

Bonnie 1.4: File '/var/tmp//Bonnie.9328', size: 1048576000, volumes: 1
Writing with putc()...         done:  50862 kB/s  99.7 %CPU
Rewriting...                   done: 732229 kB/s 100.0 %CPU
Writing intelligently...       done: 248780 kB/s  54.9 %CPU
Reading with getc()...         done:  43119 kB/s  99.9 %CPU
Reading intelligently...       done: 2002381 kB/s  99.9 %CPU


Thus, the DRBD link creates a bottleneck for disk writes. I would like 
to use 802.3ad Dynamic link aggregation but looks like DRBD works off 2 
unidirectional tcp/ip sessions, making it unable to max out the 2 gigE link.

Does anyone have any suggestion ( other than buying a pair of 10gigE 
NICs ) ?

thanks

-- 
Daniel Bourque
Sr. Systems Engineer
WeatherData Service Inc
An Accuweather Company