How Google Music Recovered 1.5 PB of Lost Data After a Massive Deletion Bug

In March 2012, a privacy‑driven deletion pipeline mistakenly erased hundreds of thousands of Google Music files, prompting SREs to launch a massive data‑recovery effort that involved MapReduce impact analysis, tape‑based backups, and a complete redesign of the deletion system.

Data RecoveryGoogle MusicLarge-Scale Deletion

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