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A comment on The 3-2-1 Backup Rule – Why Your Data Will Always Survive (2019).

Re:The 3-2-1 Backup Rule – Why Your Data Will Always Survive... by petilon on Wednesday November 24, 2021 @07:34PM (#29336948)
This 3-2-1 backup strategy is missing a dimension: time. Data is rarely unchanging. The 3-2-1 strategy is inadequate for changing data, because if you delete the wrong database table and didn't realize it, the 3-2-1 backups are going to be missing the table too.

You need to add the time dimension and have a monthly snapshot for data that is older than a year, weekly snapshot for data within last 1 year, and daily snapshot for the last 90 days.

[ Parent | on HN ]
Re:The 3-2-1 Backup Rule – Why Your Data Will Always Survive... by SOMA_BOFH on Wednesday November 24, 2021 @07:54PM (#29337083)
Yes, and validation as well.

If backups are not tested by actually retrieving data on a regular basis, you might get a nasty surprise.

The Legato NetWorker bug which resulted in 64 bit XFS inodes not getting backed up bit Pixar very hard back in the day (LGTpa40680).

[ Parent | on HN ]