# Data Integrity

## Storage Integrity

TODO: Look into [Perennial] (code at [perennial-code])

[perennial]: https://www.chajed.io/papers/perennial:sosp2019.pdf
[perennial-code]: https://github.com/mit-pdos/perennial

## Distributed Transactions

TODO: Look into [two-phase commit]

[two-phase commit]: https://en.wikipedia.org/wiki/Two-phase_commit_protocol

TODO: How does this work if not all services in the clusters hold all the nodes?