[DRBD-user] Please Help With /dev/drbd0

Felix Frank ff at mpexnet.de
Tue Sep 13 15:06:03 CEST 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On 09/13/2011 03:00 PM, Nick Khamis wrote:
> Hello Felix,
> Thank you so much for your response. I was struggling with DRBD at
> first, but no I'm up an running, loving it, and moving onto mysql,
> pacemaker sharding, read and write scale-out..

of course, your scale-out will be independent of DRBD, right? Because I
don't see how those mix, using ext3 at least.

>>> After switching the primary role from mydrbd1 to mydrbd2 and vice
>>> versa, I was able to partition the drive on both nodes.
>> Erm, what? I don't really see what you're implying. The steps should
>> have been:
>> 4. do whatever you want with /dev/drbd0 (mkfs, mount)
> When I said partition, I really meant mkfs.
> Before, I find myself in a corner, I thought I should ask. We are
> thinking about using the InnoDB engine, do you see any problem with
> this? Can you share some of your experiences please.

Not first hand, but it's supposed to work great.

If you opt for very large InnoDB logs for performance reasons, your
failovers may take very long as after primary crash, the standby node
will have to perform an InnoDB recovery.
But your data is quite safe.


More information about the drbd-user mailing list