Partitioning Question

Tony Arnold tony.arnold at manchester.ac.uk
Mon Oct 16 09:22:57 UTC 2006


Ron,

On Mon, 2006-10-16 at 09:31 +0200, Ron Smits wrote:
> On Mon, 2006-10-16 at 08:13 +0100, Tony Arnold wrote:
>
> > 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.

OK, under heavy writing I can see there would be more work in allocating
space on an LV instead of a partition, if only to figure out which
physical disk and which extent to write to.

I imagine for normal desktop office style use, most users would not
notice the difference.

> > 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.

I don't know if they have, I was just asking!

Regards,
Tony.
-- 
Tony Arnold, IT Security Coordinator, University of Manchester,
IT Services Division, Kilburn Building, Oxford Road, Manchester M13 9PL.
T: +44 (0)161 275 6093, F: +44 (0)870 136 1004, M: +44 (0)773 330 0039
E: tony.arnold at manchester.ac.uk, H: http://www.man.ac.uk/Tony.Arnold





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