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On Tuesday, 28 September 2021 18:43:06 BST Laurence Perkins wrote: |
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> There are also backup tools which will handle the compression step for you. |
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> |
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> app-backup/duplicity uses a similar tar file and index system with periodic |
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> full and then incremental chains. Plus it keeps a condensed list of file |
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> hashes from previous runs so it doesn't have to re-read the entire archive |
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> to determine what changed the way rsync does. |
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> |
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> app-backup/borgbackup is more complex, but is very, very good at |
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> deduplicating file data, which saves even more space. Furthermore, it can |
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> store backups for multiple systems and deduplicate between them, so if you |
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> have any other machines you can have backups there as well, potentially at |
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> negligble space cost if you have a lot of redundancy. |
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Thanks Laurence. I've looked at borg before, wondering whether I needed a |
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more sophisticated tool than just tar, but it looked like too much work for |
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little gain. I didn't know about duplicity, but I'm used to my weekly routine |
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and it seems reliable, so I'll stick with it pro tem. I've been keeping a |
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daily KMail archive since the bad old days, and five weekly backups of the |
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whole system, together with 12 monthly backups and, recently an annual |
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backup. That last may be overkill, I dare say. |
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-- |
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Regards, |
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Peter. |
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