Re: linux-2.4.10-pre5

Stephen C. Tweedie (
Mon, 10 Sep 2001 22:22:43 +0100


On Sun, Sep 09, 2001 at 01:18:57PM -0700, H. Peter Anvin wrote:

> The ideal way to run backups I have found is on filesystems which
> support atomic snapshots -- that way, your backup set becomes not only
> safe (since it goes through the kernel etc. etc.) but totally
> coherent, since it is guaranteed to be unchanging. This is a major
> win for filesystems which can do atomic snapshots, and I'd highly
> encourage filesystem developers to consider this feature.

It's already done. LVM's snapshot facility has the ability to ask the
filesystem to quiesce itself into a consistent state before the
snapshot is taken, and both Reiserfs and ext3 support that function.

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