# Raft Performance Tuning

Optimizing Raft for high-throughput workloads.

## Batch Processing

Batch multiple client requests into a single AppendEntries RPC:

```go
// Example: batch size of 100 entries
batchSize := 100
for i := 0; i < len(requests); i += batchSize {
    end := min(i+batchSize, len(requests))
    batch := requests[i:end]
    leader.AppendEntries(batch)
}
```

## Pipeline Optimization

Allow the leader to pipeline log entries without waiting for each Ack:

- Set `max_inflight_entries` to 100-1000
- Use a sliding window for acknowledgments
- Retry only unacknowledged entries

## Read Index Optimization

For read-heavy workloads, use **read index** instead of log replication:

1. Client sends read request to leader
2. Leader commits a heartbeat (no-op) entry
3. Once committed, leader serves read from state machine
4. Followers can serve stale reads directly

## Benchmarks

Typical throughput on a 5-node cluster:

| Workload | Throughput | Latency (p99) |
|----------|-----------|---------------|
| Writes only | 50K ops/sec | 5ms |
| Mixed (80/20) | 100K ops/sec | 3ms |
| Reads only | 500K ops/sec | 0.5ms |