[linux-lvm] 2 Q's: power outages during pvmove and fragmentation
Frank Van Damme
frank.vandamme at student.kuleuven.ac.be
Mon Jul 28 10:41:02 UTC 2003
On Monday 28 July 2003 12:17, Joe Thornber wrote:
> > 1: suppose my hamster bites my power cord during a pvmove and only half
> > of the data will have moved. How great a disaster does this result in?
> > Does lvm move one extend and does it write to disk which LE has been
> > mapped to which PE, or does it first write all the data and rewrite the
> > metadata?
> First off I encourage you to use LVM2 rather than LVM1. An
> interrupted pvmove can be resumed or aborted after a crash.
Hm, I'll consider upgrading, since lvm2 seems to be largely compatible with
older lvm installations.
> > 2: does lvm ever get fragmented if one moves data around across different
> > disks a lot?
> The extent size is normally so large (4M+) that fragmentation isn't
> really a big problem with LVM. But we will be making a more general
> remapping tool in the future that allows you to do this sort of thing.
Ok. Cool :-)
Frank Van Damme http://www.openstandaarden.be
"Je pense, donc je suis breveté."
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