Yes I’ve read through TigerBeetle’s VSR design and their rationale for not using Raft.
VSR makes a lot of sense for their problem space: fixed schema, deterministic state machine,
and a very tight control over replication + execution order.
Ayder has a different set of constraints:
- append-only logs with streaming semantics
- dynamic topics / partitions
- external clients producing arbitrary payloads over HTTP
Raft here is a pragmatic choice: it’s well understood, easier to reason about for operators,
and fits the “easy to try, easy to operate” goal of the system.
That said, I think VSR is a great example of what’s possible when you fully own the problem
and can specialize aggressively. Definitely a project I’ve learned from.
alt Hacker News
Yes I’ve read through TigerBeetle’s VSR design and their rationale for not using Raft.
VSR makes a lot of sense for their problem space: fixed schema, deterministic state machine, and a very tight control over replication + execution order.
Ayder has a different set of constraints: - append-only logs with streaming semantics - dynamic topics / partitions - external clients producing arbitrary payloads over HTTP
Raft here is a pragmatic choice: it’s well understood, easier to reason about for operators, and fits the “easy to try, easy to operate” goal of the system.
That said, I think VSR is a great example of what’s possible when you fully own the problem and can specialize aggressively. Definitely a project I’ve learned from.