[linux-lvm] LILO configuration for LVM "boot" filesystem
steve.wray at the.net.nz
Thu Jun 7 22:24:53 UTC 2001
> From: linux-lvm-admin at sistina.com [mailto:linux-lvm-admin at sistina.com]On
> Behalf Of Jack McKinney
> Big Brother tells me that Steve Wray wrote:
> > >
> > > LV are generally slower than other types of storage. Since the
> > > boot partition is generally cyl 0 it's on the fastest storage
> > > available (short of tmpfs).
> > Proportionally, how much slower is it? 50%? 25%? 12%?
> > less than 1% slower?
> In other words, every block read that goes through LVM adds basically
> a division, a memory lookup and an addition. The time it takes
> to transfer
> the block from the drive is EONs compared to the time it takes to perform
> a couple of arithmetical computations.
Unless the machine in question is an i386 with no math copro?
Sounds good to me; I was surprised someone raised a speed issue
for /tmp on a LV.
Are there any other (good) reasons to have /tmp (or anything else other
than /boot) on a 'real' partition rather than on LV?
How about swap on LV? Or does swap need to be used before the LV's
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