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Re: [Xen-users] SAN + XEN + FC + LVM question(s)

On Mon, Sep 15, 2008 at 11:02 AM, Wendell Dingus <wendell@xxxxxxxxxxxxx> wrote:
> Are there pitfalls or limitations I've not thought of here though? Is this
> approach a "best practices" or is some other method considered "better"?

AFAICS, you're right and ready to go.

the only thing i don't like too much is using LVM inside DomU's.  in
theory some scanning tools could confuse the LVM metadata inside those
volumes with the 'outer' LVM metadata and wreck the whole thing.  i
don't think it really happens in practice...

if you want to avoid LVM inside DomU's, expanding a DomU drive become
a little harder: you have to expand the LV from Dom0, and then somehow
make that resizing known to the DomU kernel. usually that means (at
least) unmounting the device, or even restarting.  after that, just
resize the FS.

if you can tolerate a few minutes of downtime to resize a DomU,
consider avoiding the 'inner' LVM.  if not, or if you're confident no
CLVM tool would confuse 'inner' and 'outer' LVM's, go with your plan.


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