On Thu, 2010-12-16 at 14:38 +0100, Ralf Mardorf wrote: > On Thu, 2010-12-16 at 08:13 -0500, gene heskett wrote: > > On Thursday, December 16, 2010 08:12:34 am Arnold Krille did opine: > > > > > 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 > > > > I run amanda here every night, but no tape, big disks instead. Much more > > usable come recovery times. > > Especially at home, where tape means DAT drive. I don't have any DAT > equivalent to store computer data, but 2 audio DAT recorders, both with > broken drives. Those drives with a thing for eating tapes. A friend has > got more, but just two DAT recorders, all recorders also with broken > drives. Another possible issue that isn't that seldom, is that the > carrier coat will loose contact to the magnetic coat. I never heard of > DAT tapes where this happened, but I know this from professional analog > video tapes. At least dropouts could arise by long time storage for such > small tapes. Ok, professional tapes for data storage might be 1/2" to > 2", dunno, but of so, they might be very expensive. I just tar to my USB > stick from time to time or from one HD to another. If we need perfect > data security at home, IMO we should use RAID, but doing backups.
Ok, ok, a RAID system still need backups, somebody might delete something etc.. _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
