we only want to save the log info for 2 weeks. I tried to set this up by modifying the frozen time, but it doesn’t seem to work. How can I delete info from index foobar database that is older than 2 weeks?
frozenTimePeriodInSecs does not guarantee deletion after that time. It simply means that data may be deleted after that time. Data older than that will in fact be deleted as long as everything else that it shares an index bucket with is also eligible for deletion. This is because deletion (by which I mean actual deletion not the surgical | delete command - that doesn't really "delete" data) is done on a whole-bucket basis, so unless an entire bucket is eligible for deletion, none of the data will be deleted.
Off the top of my head, you will probably need to make sure that your buckets are rotated quite frequently, which can be done by setting a very low maximum hot size or setting a short max time span, or both, I suppose.
# 2 day max for hot
# 200 Mb max for hot
maxDataSize = 200
# Expire data after 2 weeks
BTW, you can force a delete of events older than 2 weeks by searching for events more than two weeks old, then piping that search through the | delete command. However, this does not free up any disk space; so I'm guessing this isn't what your looking for.