Current QNAP implementation very dangerous due to lack of integrity check

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gaston67
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Current QNAP implementation very dangerous due to lack of integrity check

Post by gaston67 »

Unfortunately in the EU google cloud storage is reserved for business use so I have to stick with Glacier.

The way Glacier works there is no way to directly accessing the files that have been backed up to it, because they are not stored by their actual name or folder structure. For this reason the QNAP Glacier Backup App stores Metadata to the Glacier vault mapping files to their real name and attributes. There is however no way to check the integrity of this metadata, so if corruopted one will only detect it at the time of restore, when it's to late.

Restoring the full data just for the purpose of checking the integrity of the metadata is an a viable solution in most cases due to the required time, storage space, costs generated. So IMHO the QNAP Glacier Backup app should have an option to check the online backup integrity. This check would reduce the above effects by reducing th edownloaded information to a minimum.

The Ide would be:
  • Download metadata
  • Download archive inventory
  • Map metadata against inventory making sure all mappings are correct
  • Report any problem or potential problems
  • Match metadata agains local files (see bellow)
The last point int the above list could perform and report a number of operations optionally selected by the user and beside adding integfrity level it can also help in other circumstances:
  • Report files missing in the Glacier vault
  • Report files in the Glacier vauilt but deleted locally
  • Report attribute missmatches (size, date,owner...) between local and glacier files (probably locally changed files)
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