We'll be generating at least the top-read ZIM files on some defined interval, probably monthly (corresponding with the monthly tally of total pageview counts in pagecounts-ez).

How long should our ZIM files live in Swift? A year? Two? Forever?

There's probably a lot of redundancy here from month-to-month, and at the same time the value of pageview-based dumps is pretty fleeting. All else being equal there's probably not much reason to keep a pageview-based compilation around for longer than a few months.

Will time-bound compilations like top 5000 pageviews be created on the same schedule as less time-bound ones like Medicine?