Protocol — Server ↔ Server (Cluster) ​

This protocol is used only when a [cluster] config is present. A standby connects to the active, receives a snapshot, and then continues with the live stream. The framing rules are the same as the client protocol (op dispatch → fixed bytes → key up to \n).

Byte notation: op is an ASCII character; token and remain_ms are binary (hexadecimal, big-endian); self and key are UTF-8 text (variable length, denoted N in the structure). The trailing \n is 0A. Values change with refresh.

Table of Contents ​

• Server-to-server communication
  • P · Replication connect handshake
  • K · Upsert / snapshot entry
  • F · Snapshot end
  • R · Key delete
  • H · Heartbeat
  • X · Promote command
• Configuration rules
• Rolling restart procedure
• See also