o2-qc-repo-delete-time-interval: preserve 1 out of N versions

[Barthelemy]

Via an argument let the user preserve 1 out of N versions (e.g. 100 means keep every 100th version)

[knopers8]

Out of curiosity, what is the use case?

Also, as opposed to most of other deletion policies, this one is not idempotent - if we run it many times on the same object path within the same time interval, we delete more and more. Just to confirm, is this expected behaviour?

[Barthelemy]

1. It was to downscale the records but not delete everything, e.g. for AI purpose.
2. Yes, indeed, it is not idempotent. It is the expected behaviour and I am not sure how this would actually be idempotent without keeping a database of what has been deleted in the past. The difference with other deletion policies is that we are not anchoring on a run or time. Perhaps I can add a note in the description of the option?

[knopers8]

Perhaps I can add a note in the description of the option?

Yes, maybe just in case :D