PVE 4.2 - DRBD9: sync speed question

[baudinpr]

Hi all,

I have a cluster with 2 PVE servers with DRBD9.
The replicated volume is about 7 Tb, the disks are 7200 rpm near line SAS.
The communications channel for DRBD9 is done via 4 Gbit dedicated network cards in bond configuration (round robbin).
The sync speed is about 10 Mbyte/sec
The effective network speed misured with IPERF is about 3,6 Gbit/sec

Is there a way to increse sync speed ?
All the docs about this topic are related to 8.x.y DRBD version....

Thanks all!
Piero

 

[jeffwadsworth]

You are playing with fire using just 2 nodes. Perhaps this still applies:

http://zeldor.biz/2011/03/drbd-set-sync-speed/