Dennis Steinkamp <den...@lightandshadow.tv> wrote: > i tried to create a simple rsync script that should create daily backups from > a ZFS storage and put them into a timestamp folder. > After creating the initial full backup, the following backups should only > contain "new data" and the rest will be referenced via hardlinks (-link-dest) > ... > Well, it works but there is a huge flaw with his approach and i am not able > to solve it on my own unfortunately. > As long as the backups are finishing properly, everything is fine but as soon > as one backup job couldn`t be finished for some reason, (like it will be > aborted accidently or a power cut occurs) > the whole backup chain is messed up and usually the script creates a new full > backup which fills up my backup storage.
Yes indeed, this is a typical flaw with many systems - you often need to throw away the partial backup. One option that comes to mind is this : Create the new backup in a directory called (for example) "new" or "in-progress". If, and only if, the backup completes, then rename this to a timestamp. If when you start a new backup, if the in-progress folder exists, then use that and it'll be freshened to the current source state. Also, have you looked at StoreBackup ? http://storebackup.org I does most of this automagically, keeps a definable history (eg one/day for 14 days, one/week for x weeks, one/30d for y years), plus it keeps file hashes so can detect bit-rot in your backups. -- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
