TLDR Tech / DevOps
Improving storage efficiency in Magic Pocket, our immutable blob store
Dropbox improved storage efficiency in its immutable blob store by introducing a three-layered compaction strategy that targets different levels of fragmentation, from slightly under-filled to extremely sparse volumes. This adaptive approach, combined with dynamic tuning and safeguards, reduced storage overhead significantly and allowed the system to reclaim space faster without overwhelming infrastructure at exabyte scale.
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