[pve-devel] introduce linked disks

[Alexandre DERUMIER]

>>Can you provide some details? What database or what web server is able to 
>>use such shared disk? 

webserver : all webservers (apache,nginx,...) under linux with a shared filesystem (ocfs2,gfs,...). 
            It can be used also to do a samba cluster. 

Database : microsoft sql server enterprise. (I think oracle rac too, but I never use it)


>>I guess we need to have special URIs for shared volumes, for example 
>>
>>store1:/0/vm-0-disk-1.raw 
>>
>>(owner is VM 0). But I am not sure if that is a good idea. 
I didn't have thinked about it.

I think that the "master" need also too know where the disk is shared.
Because if we do a snapshot rollback for example, on the "master", we need to stop all vms where the disk is shared...
So do we need to parse all vm configs for this ?




----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com, "Stefan Priebe" <s.priebe at profihost.ag> 
Envoyé: Lundi 17 Décembre 2012 07:49:08 
Objet: RE: [pve-devel] introduce linked disks 

> >>And I still not know why I need that at all? 
> 
> My point was just that we some some protections if shared disks are used. 

Sure. 

> But shared disk are really usefull, I regulary use them for web cluster or 
> databases clusters. 

Can you provide some details? What database or what web server is able to 
use such shared disk? 

> Maybe Stefan have a clear idea how to implemented shared disks? 

I guess we need to have special URIs for shared volumes, for example 

store1:/0/vm-0-disk-1.raw 

(owner is VM 0). But I am not sure if that is a good idea.