Log Compaction#

// TODO

Rough Notes#

• Prevent unbounded log growth
• Take snapshots of state machine (KV store)
• Truncate log after snapshot
• InstallSnapshot RPC for slow/catching-up followers
• Snapshot metadata (last included index, last included term)
• Incremental snapshots or full state dump
• When to snapshot (configurable: every N entries, every M seconds, size threshold)
• Note: snapshot size = data size problem (document limitation, point to storage engine solutions)