private Put createPutForRegionServerLastLogRollResult(String server, Long timestamp,
    String backupRoot) {
    Put put = new Put(rowkey(RS_LOG_TS_PREFIX, backupRoot, NULL, server));
    put.addColumn(BackupSystemTable.META_FAMILY, Bytes.toBytes("rs-log-ts"),
      Bytes.toBytes(timestamp));
    return put;
  }
Creates Put to store RS last log result
@param server    server name
@param timestamp log roll result (timestamp)
@return put operation
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupSystemTable.java