Need understanding on Multiple Retention Policies

[Anaisdg]

Hello @oom,

If you create a retention policy of 7 days with a shard duration of 1 d then you will only keep 7 days of data at any point. So you will keep 7 shards at any point in time. So your understanding as described in case 1 is correct.

I think this thread might be helpful:

Retention policy on Measurement

It took me a bit to understand the whole structure, here is a summary that should answer your question Retention Policy are at database level Measurement are at database level A single measurement can belong to several retention policies (can have points in any existing RP) When you read or write data you always specify the RP and Measurement, if you don’t specify the RP, the default one is used. about your second question: you can have many RP and many measurements you can use any combinat…