On Thursday 16 December 2010 01:13:24 Dan Kegel wrote: > On Wed, Dec 15, 2010 at 10:48 PM, gene heskett <[email protected]> wrote: > > Now, if we can just get a law that when I have ... issued the delete to > > the server, it truly was deleted > > For what it's worth, Google's caution in promising deletion > is probably because it's not quite sure how to do that > quickly. Users would be Very Very Angry if a disk outage > or a fire in a datacenter resulted in the loss of their stored > email, so Google probably has some sort of offsite backup > arrangement, and that might complicate prompt deletion. > ... yup, > http://mail.google.com/support/bin/answer.py?hl=en&answer=7401 > says > "residual copies of deleted messages and accounts may take up > to 60 days to be deleted from our active servers and may remain in our > backup systems." > > So, if you were google, would you use tape backup? If so, > how would you do that permanent deletion thing? If not, > how would you make darn sure you didn't anger users by > losing messages during a disaster?
I don't think google uses magnet-tapes or similar for any backups except the vital core data of its business. Given the number and size of their data- centers around the world, they just sync the data to a different part of the world an be done with it. Of course the deletion has to be synced to all remote-copies and probably also forwarded to older backups but once such a mechanism is implemented it should do the actual delete within a day... There are even universities that decided against a new tape-library and in favor of a big stack of disks for long-term backup because these where cheaper, similar reliable and much faster for restore. And they don't need a special tape-library-managing app to access the data, a file-browser or the command-line is enough... Have fun, Arnold
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