BenchmarkLogDefault-8        1000000          1717 ns/op          69 B/op          3 allocs/op
BenchmarkLogRotate-8             300       4913319 ns/op         101 B/op          3 allocs/op

Right now, Fdatasync takes most of the time in rotate logger. We need to optimize this by using bufio.Writer.

• rsm
• client

• groupcache
• proxy

• proto
• grpc
• grpc gateway

How etcd, db handle Raft §6.3 Implementing linearizable semantics, p.70

This issue is not unique to Raft; it occurs in most stateful distributed systems. However, these
at-least-once semantics are particularly unsuitable for a consensus-based system, where clients typically need stronger guarantees. Problems from duplicated commands can manifest in subtle ways
that are difficult for clients to recover from. These problems cause either incorrect results, incorrect
states,

• raftwal
• raftpb
• raft
• raftsnap
• rafthttp
• raft-example
• raft-example snapshot
• rafthttp in HTTP2/gRPC
• multi-raft (raw node)
• paxospb
• paxos
• paxosrpc