On Tue, Oct 20, 2009 at 07:06:59AM -0700, Garrett D'Amore wrote:
> If you set it at "2", then you don't have a sudden "oh usage doubled"
> moment. It means that you immediately gain a redundancy advantage. The
> drawback is the space savings of the ditto doesn't reap rewards until you
> have the third reference, and of course for blocks that aren't heavily
> duplicated, you do wind up using double the space than you would without
> it. But the dedup is *still* a significant win over traditional storage.
To clarify, dedupditto is a threshhold. With the value set to 2 the following
would apply:
1 instance 1 copy on disk
2 instances 1 copy on disk
3 instances 2 copies on disk (since the threshhold of two is exceeded)
4 instances 2 copies on disk
...
> The case has my +1 in any event.
Excellent. Thanks.
Adam
--
Adam Leventhal, Fishworks http://blogs.sun.com/ahl
