Enum SubjectOutcome 

pub enum SubjectOutcome {
    Absent,
    SourceTooHot {
        detail: String,
    },
    Snapshot(SnapshotOutcome),
    Dedup(DedupOutcome),
    Stream {
        base_snapshot_key: String,
        base_published: bool,
        base_attempts: u32,
        outcome: StreamOutcome,
    },
}

What one subject’s turn in a round did.

Variants

Absent

The declared database does not exist on the volume. Not an error: a workload may declare a subject it creates lazily, and the first rounds after a first placement legitimately find nothing. Reported rather than skipped silently so “why is this subject not backed up” has an answer.

SourceTooHot

The source database was moving under every attempt to copy it, so nothing was published this round.

R858-B18 made stream::raw_consistent_copy_live refuse rather than return a torn image when a checkpoint lands inside the read window, after stream::COPY_VALIDATION_ATTEMPTS tries. That refusal is a transient property of the writer, not a failure of this tail — @Ashguard:polaris measured 9 of 12 copies refused under a hammering writer with a 16-page autocheckpoint, and 12 of 12 accepted at a realistic rate. Treating it as fatal would take a busy appliance’s backup down and leave it down.

It is a reported non-event rather than a silent one because a subject that reports this every round forever is not backed up, and the operator needs to see that as a longer wal_autocheckpoint, not as silence.

Fields

detail: String

Snapshot(SnapshotOutcome)

Tier 1a.

Dedup(DedupOutcome)

Tier 1b.

Stream

Tier 2. base_published is set on the round that established the base this stream is anchored to; base_attempts is how many copies that took (see [MAX_BASE_ATTEMPTS]).

Fields

base_snapshot_key: String

base_published: bool

base_attempts: u32

outcome: StreamOutcome

Trait Implementations

impl Clone for SubjectOutcome

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SubjectOutcome

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for SubjectOutcome

impl PartialEq for SubjectOutcome

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for SubjectOutcome