Re: [linux-lvm] Limitation: Snapshots does not work in cluster enviroment ?

[Daniel Schwager <daniel.schwager@dtnet.de>]

Alasdair G Kergon schrieb:
>> So, i want to use snapshot1 on server1, snapshot2 on server2. The 
>> original LV (where the snapshot is created from) is not in use (not mounted on any 
>> server)
>>     
..
> I think the userspace LVM code could be tweaked to support this
> configuration.  Until then, you'll need to activate the snapshots
> manually using dmsetup directly.
>   
This would be fine.
>
> Userspace changes we'd need for the tools (dmsetup) to support this:
>   Permit a snapshot to be activated without its corresponding origin.
>   - requires a snapshot exclusive lock (already supported)
>   - requires an origin lock that prevents any node having origin active
> (implementation needs more thought but it should be possible)
>
>   
So, thank you very much for your detailed explanation. Would
an implementaion change on "dmsetup" also solve the "Limitation of 32 
snapshots" ?
Or is there a another possibility to fix/workaround this topic ?

regards

Danny