16 Jun
2011
16 Jun
'11
2:04 a.m.
On 6/16/11, Gordon Messmer yinyang@eburg.com wrote:
I read somewhere recently that people were complaining abut LVM overhead and poor performance, but I've never seen any evidence of it. Was there something that made you think that LVM had significant overhead?
Looking at some very sparse notes I made on the decision, I think what tipped the choice was that both qcow2 and lvm added overheads, but lvm was on the whole system i.e. the host has additional processing on every i/o whereas qcow2 overheads was only for guest i/o. More critically my note was the thought as well that it would be easier to move a qcow2 file to another machine/disk if necessary than to move a partition.