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Kafka-based unmanaged

Bookkeeper-based unmanaged

Bookkeeper managed

DFS-based

Custom persistence

1. Latency

Good

Good

Good

Bad (.1 - 1s)

Good

2. Scalability

Good

Unknown

Unknown

Medium

Good

3. Ease of deployment

Good Medium (many users already have but may still need to adjust the cluster)

Bad

Good

Good

Good

4. Stateless or no new stateful component

Yes (existing)

No

No

Yes (stateless)

No

5. Development time

Good

Medium

Bad

Good

Very bad

6. Other issues

Can truncate changes

High variability (workload, provider, …)