Partitioning Question

[Ron Smits]

On Mon, 2006-10-16 at 08:13 +0100, Tony Arnold wrote:
> On Mon, 2006-10-16 at 08:07 +0200, Ron Smits wrote:
> > Nothing wrong with using LVM, allthough it will slow your diskoperations
> > down a bit.
> 
> Really? Any idea by how much and why?

I can only give you rough observations. I regularly record tv from a
tvcard. Using the same settings on an lvm disk the cpu will run towards
80% usage, on the same disktype but not in an lvm setup and the same
filesystem type it goes to 60-65%. As I said this is rough ballpark. It
was however enough to make me switch off lvm.

> >  also if the OP indeed goes to another install he would have
> > to duplicate the lvm setup if he wants to acess files on the old
> > install.
> 
> What would he have to do? If you take a set of disks that comprise a
> volume group to a different machine, don't the VGs and LVs just appear
> to the system and they need mounting?

I have not played with lvm in about a year. So if they have reached that
level of easyness, I should look into it again.
> 
> Having said that I would think the flexibility LVM gives you over fixed
> partitions far outweighs the above disadvantages.

Very true, I have been able to tie together old and second handdisks to
make bigger virtual disks and save money on new disks :).

Ron