Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi Mike,
DRBD-0.7 is really ancient and no longer supported:
http://www.drbd.org/home/releases/
I think upgrading would be a good idea to start with. I've no personal
experience with this upgrade, but found this entry on Florian's blog:
http://fghaas.wordpress.com/2007/10/03/step-by-step-upgrade-from-drbd-07-to-drbd-8/
Good luck!
Cheers,
Dirk
Op 27-9-2012 21:41, Mike F schreef:
>
> Hello everyone,
>
> I am running drbd on 2.4.x, 2.6.x. and 3.x kernels - only one systems gives me this following problem:
>
> [ this is 0.7.25 on 2.4.21-51.ELsmp ( Rhel3 32 bit ) - 16GB RAM.... 8 cores, etc ]
>
> between 6 to 12 hours of starting drbd, the transmission rates go down from 70-90+ MB/s to about 5MB/s
> At this moment, the only way to getting the transmission speed back up, without stopping/restarting the service is 'drbdadm adjust' after chnanging
> max-buffers or max-epoch-size ( change the values by 1 ) on the secondary node.
>
> so if the slowdown occurs, I change max-buffers from 10000 to 10001 and do the adjust.... the performance is perfect again.... for ~6 hours or sometimes a bit more....
>
> I spent days to see if tweaking drbd, tcp, vm would change this behavior - no luck...
>
> my current config:
>
> resource export {
> protocol C;
> incon-degr-cmd "echo '!DRBD! pri on incon-degr' | wall ; sleep 60 ; halt -f";
> startup {
> wfc-timeout 0; ## Infinite!
> degr-wfc-timeout 60; ## 2 minutes.
> }
> disk {
> on-io-error detach;
> }
> net {
> # timeout 60;
> # connect-int 10;
> # ping-int 10;
> max-buffers 10001;
> max-epoch-size 8003;
> }
> syncer {
> rate 50M;
> group 1;
> al-extents 3389;
> }
>
> # PRIMARY - remote
> on yy.xx.com {
> device /dev/drbd0;
> disk /dev/emcpowerc1;
> address 10.15.1.100:7790;
> meta-disk /dev/emcpowerc2[0];
> }
>
> # SECONDARY - this box
> on zz.xx.com {
> device /dev/drbd0;
> disk /dev/sdb1;
> address 10.15.11.103:7790;
> meta-disk /dev/sdb2[0];
> }
>
> }
>
> If I am unable to find the solution I might need to put the "adjust" in the cron - which I would hate to do...
>
> unfortunately I >cannot< upgrade the kernel, nor the linux release... any other 'fix' should be possible....
>
> thanks for all your suggestions!!!!
>
> Mike
>
> _______________________________________________
> drbd-user mailing list
> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user