[linux-lvm] Increase LV size of snapshot (not COW table size)

[Jayson Vantuyl]

You'll probably have better luck with unionfs.  LVM doesn't really do  
what you're asking for.

On Apr 14, 2008, at 7:56 PM, dave at frop.net wrote:

> I want to use LVM snapshots as CoW filesystems for virtual machines.
>
> Is it possible to increase the apparent size of the snapshot LV  
> without increasing the COW table size?
>
> Basically I want to have a minimally sized filesystem on a lv which  
> I snapshot for each virtual machine.  I don't want to be restricted  
> to having all the snapshots only be the size of the source lv.  I  
> want to increase the LV size of the snapshots at will and then  
> resize the underlying filesystems to fill it out (sparsely within  
> the COW table of course).
>
> It seems that lvresize only increases the cow table size for  
> snapshots, am I correct that LVM can't do what I want?
>
> thanks alot!
>
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-- 
Jayson Vantuyl
Systems Architect
Engine Yard
jvantuyl at engineyard.com
1 866 518 9275 ext 204

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