Write Path

Stages

1. gRPC ingress (KV.Put or Txn) in astrad.
2. Tenant-aware key encoding (optional virtualization).
3. Lane selection (Tier-0 vs normal).
4. Batch packing and adaptive linger/request sizing.
5. Raft client write and quorum commit.
6. State-machine apply into KvStore.
7. Watch event publication.

Key Controls

• ASTRAD_PUT_BATCH_*
• ASTRAD_PUT_TARGET_*
• ASTRAD_QOS_TIER0_*

Failure Semantics

• Backpressure before OOM.
• Resource exhaustion surfaced to clients when memory/queue limits are exceeded.