[DRBD-user] DRBD 8.4.1 fails to bring up stacked resource on debian 2.6.32-5-amd64

Lars Ellenberg lars.ellenberg at linbit.com
Tue Jan 31 22:05:20 CET 2012

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


On Tue, Jan 31, 2012 at 09:03:04AM -0800, envisionrx wrote:
> 
> 
> Lars Ellenberg wrote:
> > 
> > On Mon, Jan 30, 2012 at 02:56:57PM -0600, Ronald Wells wrote:
> > 
> >>Only that 8.4.0 is much more seriously broken than 8.4.1 :-/
> > 
> I was afraid of that.. I am planning to go back to 8.3 branch, but wanted
> to post this in hopes it would help fix a bug.
> > 
> > 
> >>I suggest you retry and configure
> >>	"no-disk-barriers; no-disk-flushes; no-md-flushes;"
> >>for at least the stacked resource,
> >>that may help working around this issue.
>
> If doing that would help debug the prob I'm happy to, I'm assuming that
> would not be recommended for a production system?

Does not make a difference:
the lower level DRBD does not support barrier requests,
but fails them with -EOPNOTSUPP.
So the stacked one would detect that,
and disable this option anyways.

In fact, recommended for a production system:
decent storage controllers with as big a (battery backed or otherwise)
non-volatile cache you can afford.
In which case it is also recommended to turn off barrier usage.

-- 
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com



More information about the drbd-user mailing list