func isSnapshotConsistent(
ss IndexSnapshot, cons common.Consistency, reqTs *common.TsVbuuid) bool {
if snapTs := ss.Timestamp(); snapTs != nil {
if cons == common.QueryConsistency && snapTs.AsRecent(reqTs) {
return true
} else if cons == common.SessionConsistency {
if ss.IsEpoch() && reqTs.IsEpoch() {
return true
}
if snapTs.CheckCrc64(reqTs) && snapTs.AsRecentTs(reqTs) {
return true
}
// don't return error because client might be ahead of
// in receiving a rollback.
// return nil, ErrVbuuidMismatch
return false
}
return true // AnyConsistency
}
return false
}
