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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