Hello, wt., 7 wrz 2021 o 16:50 <neumei...@mail.de> napisał(a):
> > In this case if you need to restore the whole month of data from backup > then you will need a single Full + a single (third) Diff and a few (up to > six) Incrementals. > > On the other hand the "standard" Full + every day incrementals without > intermediate diffs requires a single Full + about 30 Incrementals. > > Ah I see, that makes sense. I think by introducing the > differential-backups there comes a slight spacesaving-effect with it, since > someone doesn't need to keep the incrementals around for that long. Right? > But I understand that this was not the main goal why it was developed in > the first place. > Congratulations! You've just invented the GFS (Grandfather-Father-Son) backup policy (rotation scheme). :) It is a very common practice to have a longer retention time for Full (less frequently executed) backups, then shorter retention for Differential and shortest retention for Incrementals. best regards -- Radosław Korzeniewski rados...@korzeniewski.net
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