Struct zbq_consumer_metadata 

pub struct zbq_consumer_metadata {
    pub tail_offset: u64,
    pub progress_timestamp: u64,
    pub join_baseline: u64,
    /* private fields */
}

4096-byte per-consumer metadata page, page aligned.

A consumer has read-write access to exactly one such page; the producer retains read-write access to all of them.

Fields

tail_offset: u64

Tail offset known to the consumer, atomically published with release.

progress_timestamp: u64

Timestamp relative to join_baseline of the last progress update.

join_baseline: u64

Baseline timestamp captured at consumer join time.