Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 08/14/2012 03:51 PM, Nik Martin wrote: > On 08/13/2012 07:43 PM, Dennis Jacobfeuerborn wrote: >> On 08/03/2012 03:27 AM, Dennis Jacobfeuerborn wrote: >>> Hi, >>> I just set up a traditional drbd primary/secondary system between two hosts >>> that are connected with gigabit ports. The problem is that the resync rate >>> is only 5M even though in the config file I set it to 40M. >>> >>> I also tried: >>> drbdadm disk-options --resync-rate=40M drbd1 >>> >>> which doesn't result in an error but apparently doesn't get applied either. >>> I also tried 1M but that gets ignored too. >>> >>> Any idea what might be going on here? >>> (This is drbd 8.4.1 on a Centos 6.3 system) > There is also a setting called > c-max-rate that if not set, is set to 20M I think. > > Also, the wild jumping around sounds like a network issue. I have a 10GB > crossover cable connecting my two DRBD nodes, and have jumbo frames turned > on, and can get near wire speed (of the disk bus) through it. Are you doing > sync through a switch? If so, are your MTUs set consistently? Do you have > any type of broadcast storm control in your switches? I think DRBD will > trigger storm control in switches too. I have no problems with other tools and DRBD 8.3 does not show this problem either so I doubt it's the network. Regards, Dennis