On Mon, 9 Jul 2001, Lumpkin, Buddy wrote:
> Also, snapshots are a full atomic copy operation while checkpoints
> return almost instantly and have a copy-on-write behavior thereafter.
> The result at least appears to be instantaneous.

Volume snapshots are as you describe.  File system snapshots are
copy-on-write.
-- 
ROGER B.A. KLORESE                                          rogerk AT QueerNet 
DOT ORG
PO Box 14309                                            San Francisco, CA 94114
"Go without hate. But not without rage. Heal the world."        -- Paul Monette