Module scheduling 

Scheduling and queue management (Section 12).

Manages PendingVerify, FetchQueue, and InFlightFetch queues for the replication pipeline. Each key progresses through at most one queue at a time, with strict dedup across all three stages.

Structs

InFlightEntry

An in-flight fetch entry tracking an active download.

ReplicationQueues

Central queue manager for the replication pipeline.

Enums

AdmissionResult

Outcome of ReplicationQueues::add_pending_verify.

Constants

MAX_FETCH_QUEUE

Hard upper bound on the number of keys held in fetch_queue.

MAX_PENDING_VERIFY

Global hard upper bound on the number of keys held in pending_verify.

MAX_PENDING_VERIFY_PER_PEER

Per-source hard cap on pending_verify entries attributed to a single hint_sender peer.