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Re: Tarsnap de-dup - one machine or all?
Deduplication is tied to each machine key.
If you have multiple machines using the same key, then data will
be deduplicated between all those systems . If you have
multiple machine keys, then there will be no deduplication between
 If you are sharing a machine key, then the cache dir should be
kept in sync between those machines:
If you're just "moving" from one system to another, then you don't
need to worry about keeping the cache in sync. Just copy the key
and cachedir over, then test it with --dry-run and you should only
see a tiny amount of new data (metadata).
On Thu, Sep 17, 2020 at 08:50:13AM +0100, Arthur Chance wrote:
> Does tarsnap's de-dup work on one machine at a time or across all
> machines in an account?
> The reason I ask is because I've moved a largish mail archive from one
> machine to another and am unsure whether the backup on the new machine
> will reuse the blocks from the old one, or whether I'll end up using
> double the space.
> The number of people predicting the demise of Moore's Law doubles
> every 18 months.