[linux-lvm] Performance impact of LVM
ssm+lvm at freshdot.net
Mon Jul 31 07:58:46 UTC 2006
Quoting Mark H. Wood (mwood at IUPUI.Edu):
> Some uses of LVM *could* increase I/O wait time. It's easy to paste new
> extents onto existing volumes, and the new extent probably won't be
> contiguous with the old one. So you *could* see longer average seek
> delays due to additional arm travel distance between extents. It's
> strongly dependent on access patterns.
Hmm. Yeah, this setup i'm using was created and thereafter never changed
(yet). So i guess it should all still be contiguous...
Thanks for the info though. I'll see if i can do some tests when i get
my new hardware to play with. But as said before, it's probably not even
measurable. The added latency that is...
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