Resizing PVs (was: Installation Impressions)
Chris Adams
cmadams at hiwaay.net
Sun Feb 6 00:10:25 UTC 2011
Once upon a time, Nikolaus Rath <Nikolaus at rath.org> said:
> You can shrink a PV, but you will loose the extents that are stored in
> the space that you have truncated. I don't consider that resizing.
Changing the size of something is called resizing.
> Unfortunately, pvmove can only move extends to other PVs but not to a
> different location in the same PV.
Not true. It isn't as straightforward; you have to know a map of the
PEs and specify them to the pvmove command like (assuming the
destination PEs are not in use):
pvmove /dev/sda2:1000-1100 /dev/sda2:100-200
IIRC you get a warning, and it is slow (obviously, reading and writing a
bunch of data on the same drive is slow).
--
Chris Adams <cmadams at hiwaay.net>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.
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