Can I create a normal logical volume on a SAN LUN on the host?

Y

yatesco

Renowned Member
Sep 25, 2009
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Hi all,

I have a SAN which exposes a number of LUNs. Some of those are mapped by the proxmox cluster. I noticed that every VM hard disk is actually a logical volume in the volume group that represents that LUN.

Is there any reason why I shouldn't manually create a volume group in that LUN on the proxmox host?

The reason, FYI is that I don't have any local storage and need somewhere to temporarily archive all the VM backups whilst they are being rsynced offsite.

I keep thinking "well, der, sure - why not", but I just want to check that Proxmox doesn't keep a local cache of what is on that VM.

Better safe than sorry - feel free to use the words "well of course - dummy" :)
 
yatesco said:
Hi all,

I have a SAN which exposes a number of LUNs. Some of those are mapped by the proxmox cluster. I noticed that every VM hard disk is actually a logical volume in the volume group that represents that LUN.

Is there any reason why I shouldn't manually create a volume group in that LUN on the proxmox host?
Click to expand...
The whole lun is used by the volumegroup - so you can't create a second volumegroup on it. But you can add a logical-volume which you can mount to /backup, and add in the proxmox-gui this directory for backups.
The reason, FYI is that I don't have any local storage and need somewhere to temporarily archive all the VM backups whilst they are being rsynced offsite.

I keep thinking "well, der, sure - why not", but I just want to check that Proxmox doesn't keep a local cache of what is on that VM.

Better safe than sorry - feel free to use the words "well of course - dummy" :)
Click to expand...
Why you don't use a second LUN from your Storage?
BTW: the relations for proxmox between VM and LVs are handelt with lvm-tags.

Udo
 
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