DRBD nodes don't synchronize.. Pls help!

pyruby · 11-18-2009, 07:36 PM

I set up drbd on 2 nodes, but they seem to take forever to synchronize, here's what I got from my primary node when I did a "cat /proc/drbd"

m:res cs ro ds p mounted fstype
... sync'ed: 0.1% (99928/99944)M
0:r0 SyncSource Primary/Secondary UpToDate/Inconsistent C /mnt/drbd ext3

I tried "drbdadm -- --discard-my-data connect r0" on the secondary node which seems to have 'bad' data, but it still doesn't work.

Any help will be appreciated, thanks in advance.

fang0654 · 11-18-2009, 09:27 PM

You can use the following:

Make sure you run this from the node with the good data!

Code:

drbdadm -- --overwrite-data-of-peer primary r0

How are your nodes connected?

pyruby · 11-18-2009, 10:27 PM

Tried the command... but nothing changes.

The nodes are connected into the same network using a switch box.

And here's my drbd.conf:

global {
usage-count yes;
}
common {
protocol C;

}

resource r0 {

on drbd1 {
device /dev/drbd0;
disk /dev/sda2;
address 192.168.1.101:7788;
meta-disk internal;
}
on drbd2 {
device /dev/drbd0;
disk /dev/sda2;
address 192.168.1.100:7788;
meta-disk internal;
}
}

DaveQB · 11-18-2009, 11:40 PM

How much data is there and what kind of ethernet connection? 100 or 1000?

kirukan · 11-19-2009, 01:35 AM

Quote:

m:res cs ro ds p mounted fstype
... sync'ed: 0.1% (99928/99944)M
0:r0 SyncSource Primary/Secondary UpToDate/Inconsistent C /mnt/drbd ext3

It doesn't finish the synchronizing, once it finish only the Secondary state will change as UpToDate(and your disk about 100GB so may be it will take time to finish synchronize)

Are you using dedicated network line for DRBD and what is the bandwidth?

pyruby · 11-19-2009, 04:21 AM

Thanks for the reply! The problem is solved now.

I used "drbdsetup /dev/drbd0 syncer -r 110M" to speed up the sync rate. It takes around 1 and a half hours and the nodes are connected.