Ask the backup

Wednesday morning, standup. Priya asks it the way everyone asks it, hopefully: can we get the split back from the backup?

It deserves a real answer, so Finn gives the room one. A backupConcept · lights on your mapbackupA separate copy of data, kept so the original can be recovered after loss or damage. The critical word is separate. A copy that dies in the same incident as the live database protected nothing. is Traversal’s insurance against a specific disaster, the one where data that existed stops existing. A corrupted table, a bad migration, a deleted-by-mistake Tuesday. The registrations database is copied on schedule, the copies live deliberately far from the original, in a different zone, on different machines, and the word doing all the work in that sentence is separate. Insurance kept in the building that burns is a receipt for ashes.

The half everyone forgets

The team even practises the other half. restoreConcept · lights on your maprestoreRecovering data from a backup. The half everyone forgets: a backup only counts if it restores successfully, which is why disciplined teams rehearse restores instead of trusting that the copies will work on the worst day. drills run monthly at Traversal, the same instinct that pulled the plug on the database during freeze week to watch the twin take over. An untested backup is a hope with a filename. The monthly drill turns it back into insurance.

And none of it helps Case. Wednesday’s restore drill is pointed at Sunday’s copies, the restore lands clean, and for a hopeful moment it looks like an answer. Then somebody pulls up row 11208: every split present, 25K empty. Perfect, and perfectly useless. The backup is a faithful photograph of what the database held, and what the database held was a hole. Backups recover what was written and lost. They cannot conjure what was never written at all, and the trace already says the 25K event never reached a database anywhere.

Which closes the recovery question for good and leaves suspect three standing alone: the mat itself, out on the course, on race morning. No log describes that gap. Something else might. Traversal’s course photographers spent Sunday shooting everything that moved.