krad writes:
In my experience dedup requires a fairly large amount of juice so if your backups are large I hope you machines are big on ram
The way tarsnap does it is not that intensive. I have used in an old 900Mhz machine with less than 640MB of RAM and it worked well. I think the program computes some sort of hash for blocks of data and then the server checks to see if it already has that block.
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