[Ocfs2-users] lvm2 not cluster aware - okay, so how should I stripe my LUNs?

[Lars Marowsky-Bree]

On 2006-10-04T15:41:47, Humpherys Philip D Contr 532 CMMXS/CL <Phil.Humpherys at hill.af.mil> wrote:

> Hi, I'm testing ocfs2 in a 2-node ocfs2 cluster.  I have 12 SAN LUNs that
> I'd like to stripe and mount up as an ocfs2 filesystem.  I've been told that
> because LVM2 is not cluster aware, that it can't be used.  I'm trying to
> make mdadm work.  (using EMC powerpath for multipath).  I can create an md
> raid0 device on one node using the /dev/emcpowerxx pseudo-devices, and on
> the other node the md device is there, but it has scanned for the devices,
> and it shows the /dev/sd* devices, not the pseudo-devices that really need
> to be used for multi-path.  

Software striping isn't such a great idea in the cluster. md's handling
of metadata isn't cluster safe either, just like LVM2/dm.

This is being developed, but not done yet.

The recommended RAID for clusters is implemented in the SAN.


Sincerely,
    Lars Marowsky-Brée

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