On Mon, Sep 24, 2007 at 05:08:31PM -0400, bob944 wrote:
> In the technologies I'm familiar with--one of them is old, another new,
> it's conceptually simple.  "The system," whether that's a standalone
> system or a box of disk with some smarts or an agent on the backup
> client, receives data and examines it in blocks of some size (AFAIK,
> always way larger than a 512-byte disk block).  Simplistically, it
> checksums the "block" and looks in a table of
> checksums-of-"blocks"-that-it-already-stores to see if the identical
> <ahem, anyone see a hole here?> data already lives there.

Yes, there's a hole there if that's all you're relying on.  Not all of
them do that.

-- 
Darren Dunham                                           ddunham AT taos DOT com
Senior Technical Consultant         TAOS            http://www.taos.com/
Got some Dr Pepper?                           San Francisco, CA bay area
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