private Scan createScanForReadRegionServerLastLogRollResult(String backupRoot) {
    Scan scan = new Scan();
    scan.setStartStopRowForPrefixScan(rowkey(RS_LOG_TS_PREFIX, backupRoot, NULL));
    scan.addFamily(BackupSystemTable.META_FAMILY);
    scan.readVersions(1);

    return scan;
  }
Creates Scan operation to load last RS log roll results
@return scan operation
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupSystemTable.java