NATS KV

• 基于 JetStream 的 KV 存储
• https://pkg.go.dev/github.com/nats-io/nats.go#KeyValue
• https://github.com/nats-io/nats-architecture-and-design/blob/main/adr/ADR-8.md
  • read in-memory cache
  • key \A[-/_=\.a-zA-Z0-9]+\z - 不能 . 开头或结尾
  • bucket \A[a-zA-Z0-9_-]+\z
  • bucket
    • main KV_<Bucket Name>
    • ingest subject $KV.<Bucket Name>.>
    • max_msgs_per_subject - 历史版本数 - 最大 64
    • rollup_hdrs - rollup 删除
    • max_age - TTL
    • max_msg_size - value size
    • max_bytes - bucket size
  • $KV.CONFIGURATION.auth.username
    • io.nats.jetstream.api.v1.stream_msg_get_request

kv store	nats
bucket	JetStream stream
key	subject
value	message payload
revision	stream sequence

nats kv