2 Matching Annotations
 Dec 2019

www.pointsoftware.ch www.pointsoftware.ch

So if you create one backup per night, for example with a cronjob, then this retention policy gives you 512 days of retention. This is useful but this can require to much disk space, that is why we have included a nonlinear distribution policy. In short, we keep only the oldest backup in the range 257512, and also in the range 129256, and so on. This exponential distribution in time of the backups retains more backups in the short term and less in the long term; it keeps only 10 or 11 backups but spans a retention of 257512 days.


en.wikipedia.org en.wikipedia.org

the exponential distribution is the probability distribution of the time between events in a Poisson point process, i.e., a process in which events occur continuously and independently at a constant average rate.
