Backup and restore for MagnetoDB

We do DB agnostic backup/restore, that is we store backed up data in DB independent format (say, JSON) and do not use C* specific tools.

We want to have several options for where to store backed up data, but consider Swift as a primary objective.

We only guarantee data integrity on per item basic, that is if batch update is running during back up process, some items may get updated but others may don’t. But no item can get ‘half-updated’.

spec:
http://magnetodb-specs.readthedocs.org/en/latest/specs/kilo/approved/backup-restore-api.html
http://magnetodb-specs.readthedocs.org/en/latest/specs/kilo/approved/backup-restore.html