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Re: [linux-lvm] lvm on a share environnement (SAN inside)



the two machine use the same lun, on this lun, there is one vg with a logical volume by virtual machine (10 virtual machine). The idea is if one xen is down, the other can launch the virtual machine ad continu service.

Le 27 sept. 07 à 19:36, Chris Cox a écrit :

hubert chomette wrote:
Hi,
I recently install a SAN at my work. One lun is used for XEN and can be
used by two xen server.
For more flexibility I use lvm on this lun. I was very happy of the
result, unless I discover (during a conversation with a friend) that lvm metadata can be compromised if the two server simulty modify metadata.
- So what can I do?

Use seperate LUNs.  I'm not sure what your friend is talking about.
Unless you have two machines using the same LUN, in which case
there are issues... this would be a cluster filesystem issue, or
near-high availability issue...

- Is it possible to allow LVM metadata modification by only one server?
- should I use clvm instead?

Metadata won't creep outside of what is visible.

- Is it possible to migrate lvm to clvm without any data lost?

Not sure.


thank's for your help

regards,

ps: sorry for my poor english




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--
Chris Cox
Sr. Unix Sys Admin

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read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/




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