[PVE-User] Proxmox, iSCSI, Mirrored LVM?

Eneko Lacunza elacunza at binovo.es
Tue Dec 10 10:01:00 CET 2013


Hi,

Some time ago I did some (non-extensive) tests and I didn't like what I 
saw. It seemed LVM wouldn't warn when a RAID1 had a failed disk, LV 
seemed to behave wrongly and so on.

If your environment allows it, I recommend to use mdraid, even if your 
have to do it on different PV LVs; although it'd be better to use 
disk->md->lvm .

Cheers
Eneko

On 08/12/13 11:33, Marco Gabriel wrote:
> I never tried this myself, but I think you'll need to use the mirror 
> log disk logs instead of the default disk log. Maybe this helps: 
> http://www.sandelman.ca/mcr/blog/lvm/
>
> Marco
>
> Am 07.12.13 16:15, schrieb Lex Rivera:
>> By LVM mirror i mean mirrored LV volumes, distributed on several VGs. 
>> (PVs is iSCSI-based disks running on two separate servers)
>> Like RAID1.
>> On Fri, Dec 6, 2013, at 03:59 PM, Marco Gabriel - inett GmbH wrote:
>>> -----Urspr√ľngliche Nachricht-----
>>> > Hello, has anyone tried LVM mirror for storage HA?
>>> > We managed to get mirror running with two iSCSI disks, but when one of
>>> > devices goes offline, test VM acting strange.
>>> What do you mean with LVM mirror?
>>>
>>> - LVM on top of DRBD? - you need to use active/active
>>>
>>> - mirroring of a specific logical volume?
>>>
>>> - mirroring on storage hardware layer? Proxmox shouldn't care then 
>>> if you have iscsi multipathing
>>>
>>>
>>> best regards
>>>
>>> Marco
>>>

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