As far as I see swift does not support data backup/recovery. Sometimes backup/recovery might prevent damages from unwanted data overwrites, which is why I suppose that many users would like to see this functionality in OpenStack.
It looks like backup/recovery can be easily added to swift without many changes in the source code. After successful file upload via PUT method, stored file receives name equal to timestamp and all the previous versions of the file are deleted by DiskFile#unlinkold method (swift/obj/server.py). If one wants to allow keeping up to N backup versions (can be configurable value), DiskFile#unlinkold method can be modified to keep last N versions of a file and delete all the others. Afterwards, recovery would mean deleting last version of the file based on timestamp and will be allowed up to depth N-1 (this will not allow "recovery from recovery" though). Of course, modifications to ObjectController will be necessary to allow dedicated HTTP call to recover object to its previous version. Best Regards, Rostik _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
