> Read/write from the same database

This gets abused even within one service. If I could get my coworkers to FFS stop using rows in a database as a degenerate kind of communications channel between components (with "recipients" slow-polling for rows that indicate something for them to do), I'd be a lot happier.

> rowhammering the data you want into the next job.

I hope the aforementioned coworkers don't read HN.