synchronous replication to replicas is not necessary for data durability and doesn’t have to be a huge drag on throughput. for example, you can achieve high thr

synchronous replication to replicas is not necessary for data durability and doesn’t have to be a huge drag on throughput. for example, you can achieve high throughput by pipelining uncommitted transactions and then tracking when they are durably committed to backing store (like s3) for when to ack back to clients. and when dealing with failover, you can use the central store for determining place in ledger rather than whatever is on the replica that happens to get leadership.