[jonaf]

I couldn't find this on your product page, but does Hazelcast Jet support "global windows"? I've found 90% of stream processing systems I've come across only work within a window, but if I need to perform a computation "for all time," I'm SOL.

[capkutay]

Stream processing engines are meant to work with ephemeral data, fast data. Couldn't you just use a database to query 'all time'?

[cangencer]

We are adding something called a "rolling aggregation", where you receive a record, accumulate it and then emit the current accumulated value. I'm not sure if this matches what you want.