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fix restore location in archive rounds

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taoshuning
2023-08-15 09:18:21 +00:00
committed by ob-robot
parent eb7f5dea9e
commit fef4f45e67
1 changed files with 15 additions and 0 deletions
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15
src/logservice/restoreservice/ob_log_restore_archive_driver.cpp
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@ -203,6 +203,21 @@ int ObLogRestoreArchiveDriver::get_palf_base_lsn_scn_(ObLS &ls, LSN &lsn, SCN &s
} else if (OB_UNLIKELY(!scn.is_valid() || !lsn.is_valid())) {
ret = OB_ERR_UNEXPECTED;
LOG_ERROR("get_palf_base_lsn_scn_, return invalid scn or lsn", K(id), K(scn), K(lsn));
} else if (!ls.get_clog_checkpoint_scn().is_valid()) {
// checkpoint_scn not valid, just skip it
LOG_ERROR("ls checkpoint_scn not valid", K(ls));
} else {
// The start scn for palf to restore is the min scn of a block,
// so if the min scn exists in two or more archive rounds and the the rounds are not continuous,
// the location of the scn will hit the first round, which results to restore failure.
//
// Use the ls checkpoint_scn to help the first location.
//
// For example, the round 1 range: [100, 200], the checkpoint_scn of the matched backup fall in the range [100, 200],
// the round 2 range: [300, 500], the checkpoint_scn of the matched backup in [300, 500].
// But the start_scn for restore maybe only 50, so it will locate failed.
// The checkpoint_scn is precise, it will help to locate the correct round.
scn = std::max(scn, ls.get_clog_checkpoint_scn());
}
return ret;
}