We tend to have very large file systems (largest NetApp one is > 40tb), and the default 20% snapshot reserve starts to be a huge waste of space. Is there any good reason not to just set it to 0%? The snapshotted files aren't limited by the reserve, so what's the real point of it? A lot of times we end up with reserves that are only a few % in use, so it's truly wasted space. I've been setting those ones to have small reserves, and the discussion ensued whether it's worth having any reserve at all.
Hi Vincent,
Setting snap reserve to 0% is fine. The only down side is that when you delete files that are in snapshots, you don't see any space freed up. You get the space back later when all snaphots containing the deleted files are deleted.
Steve Losen scl@virginia.edu phone: 434-924-0640
University of Virginia ITC Unix Support