GoKawiilMeta details Delta, an internal object storage system built on chain replication
Meta has published an architectural overview of Delta, an internal object storage service designed to hold build and distribution artifacts and support disaster recovery bootstrap operations. Delta exposes just four operations—put, get, delete, and list—and prioritizes reliability and horizontal scalability over latency or storage efficiency.
GoKawiil's interpretation of the reporting above, not reported fact.
Meta positions Delta at the foundation of its infrastructure stack, meaning its reliability could directly affect how quickly the company can recover other systems after major outages. The emphasis on minimal dependencies and simplicity over performance suggests Meta views resilience of bootstrap-critical systems as more valuable than efficiency gains, an approach other large infrastructure operators may find instructive.
- Delta is Meta's internal object storage system built for disaster recovery bootstrap use cases.
- It supports only four basic operations and is designed for horizontal scalability with minimal dependencies.
- Meta prioritizes reliability and simplicity over latency and storage efficiency in this system.
Source: engineering.fb.com — Kumar Mrinal, 2026-09-21
Published there as: “Delta: Highly available, strongly consistent storage using chain replication (2022)”
Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.