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RE: [linux-lvm] 'snapshot' target still experimental :-(



Hi,

Ah, I see, reading is never the problem. Do a simple

cd to a directory on an lv that has an active snapshot

dd if=/dev/zero of=test bs=1M count=10000

And see how hard it is to remove a live active snapshot. You will find
that lvremove hangs, you can press Ctrl-C, then try lvscan and it hangs
- maybe 2.6.15.1 has fixed this?  Would you let us know?

Thanks.

Steffen

-----Original Message-----
From: linux-lvm-bounces redhat com [mailto:linux-lvm-bounces redhat com]
On Behalf Of Kevin P. Fleming
Sent: Wednesday, February 01, 2006 12:56 PM
To: LVM general discussion and development
Subject: Re: [linux-lvm] 'snapshot' target still experimental :-(

Steffen Plotner wrote:

> With FC4 for example I cannot remove a snapshot while the underlying 
> logical volume is under heavy I/O.  Once all I/O stops I can remove 
> the snapshot. Doing a lvremove will hang.

Interesting.

I am using this on a Gentoo system using vanilla kernel 2.6.15.1, and my
volumes don't experience 'heavy I/O' at the times I make backups, so it
shouldn't be too bad.

Thanks for the info :-)

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