[linux-lvm] mirrored LV + cmirror problem
Lajko.Attila at ulx.hu
Tue Feb 19 13:51:02 UTC 2008
I disconnected the lun from both nodes and it worked, the LV went to
linear. Thanks for the help!
One more question, what do you think about this testing scenario: Two-
nodes cluster, each node has a local disk which is exported via GNBD
to itself and to the other one. I build a cluster-mirrored LV on the
GNBD devices, then I kill one of the nodes. In this case, the cmirror
should work well? The LV will go to linear mode?
On Feb 18, 2008, at 7:30 PM, Jonathan Brassow wrote:
> That's the problem. (C)LVM does not currently have a way to handle
> the disappearance of a device from just one machine... it expects a
> similar view of devices from all machines in a cluster. "Locking"
> on the second node fails because it doesn't know what to do with the
> disk that it sees (that has been removed from the node suffering the
> There is someone working handling orphaned/removed devices that
> reappear (which would be similar to this case), but I'm not sure if
> they've taken this scenario into account. I'll let him know about
> On Feb 18, 2008, at 10:48 AM, Lajkó Attila wrote:
>> Yes, I disconnected the lun via the Vtrak GUI from one of the nodes
>> On Feb 18, 2008, at 5:08 PM, Jonathan Brassow wrote:
>>> How are you performing the failures? It looks like just one
>>> machine is loosing its connection to the device, while the other
>>> machines links remain in place.
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