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verify_rollback

noxu_rep::stream::syncup

Function verify_rollback 

Source 
pub fn verify_rollback(
    matchpoint: &Matchpoint,
    last_txn_end: Vlsn,
    last_sync: Vlsn,
    num_passed_commits: u64,
) -> RollbackDecision
Expand description

Decide what to do given the matchpoint search result and the replica’s VLSN range, faithful to ReplicaFeederSyncup.verifyRollback’s truth table.

num_passed_commits is JE searchResults.getNumPassedCommits(): the count of commit/abort records the backward matchpoint scan stepped over. A non-zero count means the matchpoint lies before a txn end even when lastTxnEnd <= matchpoint numerically (the txn end was logged at a VLSN the scan passed), forcing hard recovery rather than a normal rollback.