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A comment on ZumoDrive announces pricing (and it's cheaper than it seemed). Parent comment

Re:ZumoDrive announces pricing (and it's cheaper than it see... by jwilliams on Sunday January 18, 2009 @04:08AM (#439224)
Interesting - I wonder if they can/do detect identical files and store them once?

One of the storage solutions I worked on did this - EMC Centera - mostly to handle email archive (in corporates you can end up with the same attachment duplicated many times over - it's a bit of a pain).

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Re:ZumoDrive announces pricing (and it's cheaper than it see... by modoc on Sunday January 18, 2009 @10:11AM (#439365)
I built a file storage web system several years ago (very popular when free, but when the free beta ended not many people wanted to pay). We computed the hash of each uploaded file, and only stored one copy of the file based on the hash. The database based filesystem simply recorded the hash of the file as basically a pointer to the actual file. This allowed multiple people to have the same file, with different file names (stored in the db), but only actually store the file once. Very simple.
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