Re: [Xen-users] Using lvm for domUs

["Michael T. Babcock" <mike@xxxxxxxxxxxxxx>]

Nico Kadel-Garcia wrote:
> First: unless you have really compelling need, do *NOT* use lvm inside 
> of Xen guests. Seriously, you're just adding another layer of 
> management and configuration problems you don't need. Keep your LVM 
> work in Dom0.
There's no real difficulty in management, the issue becomes mounting of 
DomU LVM partitions from within Dom0.
I've tried it both ways and like being able to mount the DomU partitions 
inside Dom0 easily, but pv resizing vs. ext3 resizing wasn't a big deal 
and performance barely changed at all.
That said, I'd love to be able to have the DomUs detect partition size 
changes without reboots of the DomU or even nicer -- have the LVM 
handling be passed through to Dom0 directly instead of handled as 
emulated partitions.  That is to say, /dev/DomU_VG/logs could be 
configured to pass through to Dom0's /dev/main/xen_DomU_logs directly 
... but I've never played with the LVM internals so I'm not sure how 
likely that is to ever happen.
--
Michael T. Babcock
http://mikebabcock.ca


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