hcq/oceanbase
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

adjust the start replay scn when backup start at the first archive piece

Browse Source
This commit is contained in:
hamstersox
2023-01-12 07:46:02 +00:00
committed by ob-robot
parent 73d2888ec2
commit 0ee1285b06
2 changed files with 32 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/rootserver/backup/ob_backup_data_set_task_mgr.cpp
View File

@ -1585,16 +1585,31 @@ int ObBackupSetTaskMgr::calculate_start_replay_scn_(SCN &start_replay_scn)
{
int ret = OB_SUCCESS;
ObBackupLSMetaInfosDesc ls_meta_infos;
SCN tmp_start_replay_scn = set_task_attr_.start_scn_;
if (OB_FAIL(store_.read_ls_meta_infos(ls_meta_infos))) {
ObTenantArchiveRoundAttr round_attr;
if (OB_FAIL(ObTenantArchiveMgr::get_tenant_current_round(job_attr_->tenant_id_, job_attr_->incarnation_id_, round_attr))) {
LOG_WARN("failed to get tenant current round", K(ret), KPC(job_attr_));
} else if (!round_attr.state_.is_doing()) {
ret = OB_LOG_ARCHIVE_NOT_RUNNING;
LOG_WARN("backup is not supported when log archive is not doing", K(ret), K(round_attr));
} else if (round_attr.start_scn_ > set_task_attr_.start_scn_) {
ret = OB_LOG_ARCHIVE_INTERRUPTED;
LOG_WARN("backup is not supported when archive is interrupted", K(ret), K(round_attr), K(set_task_attr_.start_scn_));
} else if (OB_FAIL(store_.read_ls_meta_infos(ls_meta_infos))) {
LOG_WARN("fail to read ls meta infos", K(ret));
} else {
// To ensure that restore can be successfully initiated,
// we need to avoid clearing too many logs and the start_replay_scn less than the start_scn of the first piece.
// so we choose the minimum palf_base_info.prev_log_info_.scn firstly, to ensure keep enough logs.
// Then we choose the max(minimum palf_base_info.prev_log_info_.scn, round_attr.start_scn) as the start_replay_scn,
// to ensure the start_replay_scn is greater than the start scn of first piece
SCN tmp_start_replay_scn = set_task_attr_.start_scn_;
ARRAY_FOREACH_X(ls_meta_infos.ls_meta_packages_, i, cnt, OB_SUCC(ret)) {
const palf::PalfBaseInfo &palf_base_info = ls_meta_infos.ls_meta_packages_.at(i).palf_meta_;
tmp_start_replay_scn = SCN::min(tmp_start_replay_scn, palf_base_info.prev_log_info_.scn_);
}
if (OB_SUCC(ret)) {
start_replay_scn = tmp_start_replay_scn;
start_replay_scn = SCN::max(tmp_start_replay_scn, round_attr.start_scn_);
LOG_INFO("calculate start replay scn finish", K(start_replay_scn), K(ls_meta_infos), K(round_attr));
}
}
return ret;