- An ad-hoc request made while its target's run is under way is the run after it: the scheduler
dropped a second fire of a running id, so a second Takeout file was never imported and its key
stayed queued until a restart.
- Un-marking or resetting a video is remembered (video_unmarks): an import of an older YouTube view
no longer marks it watched again; un-marks take the user's Takeout lock.
- One user's failure in the Shorts job's Takeout pass is theirs: the job keeps its own result, the
others are settled, and a failed lookup spends none of the daily share.
- The upload reads the user's id before giving the read connection back.
- A watched row waits on a discovery video (search or explore) until the catalog keeps it, so a
mark never pins it against the cleanup jobs.
- The history is decoded a window at a time, a Watch later file over 2 MiB is refused unread, and
two uploads at once across all users (takeout_server_busy).
- A Watch later list goes in as one presence read and one insert.
peter
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