I am setting up push task queue on my Google App Engine App with a countdown parameter so it will execute at some point in the future.
However, my countdown parameter can be very large in seconds, for instance months or even a year in the future. Just want to make sure this will not cause any problems or overhead cost? Maybe there is a more efficient way to do this?
It probably would work, but it seems like a bad idea. What do you do if you change your task processing code? You can't modify a task in the queue. You'd somehow have to keep track of the tasks, delete the old ones and replace them with new ones that work with your updated code.
Instead, store information about the tasks in the data store. Run a cron job once a day or once a week, process the info in the data store, and launch the tasks as needed. You can still use a countdown if you need a precise execution date and time.