Enum TailStep

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pub(super) enum TailStep {
    Apply {
        records: Vec<UsnRecord>,
        truncated: bool,
    },
    Rescan(JournalGone),
    Fail(UsnError),
}

Expand description

What one blocking-read outcome means for the tail loop.

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Apply

Apply the records to the index, then publish the new checkpoint — in that order (see the checkpoint-after-apply invariant at the apply site).

Fields

§records: Vec<UsnRecord>

§truncated: bool

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Rescan(JournalGone)

The journal id is dead. Recovery is always a full rescan (docs/RESEARCH.md standard practice): invalidate the shared checkpoint, drop the snapshot, announce Rescanning, restart the outer loop.

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Fail(UsnError)

Unrecoverable read error — the volume goes Failed.

Auto Trait Implementations§

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impl UnwindSafe for TailStep

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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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