you can use export and import command while your database is opened.
the database which you exported was the data before you completed the command.if you want backup the changing data, you may use the parameter with "inctype=incremental".
the database which you exported was the data before you completed the command.if you want backup the changing data, you may use the parameter with "inctype=incremental".
这个时候最好没有人操作为了维护数据的一致性,必须加 consistent = y,但这个时候回滚段需要很大
two brothers or sisters!
(not closed) and bascically the user transaction should not be performed during the time of exporting and importing