如何验证RMAN备份有效性

小编给大家分享一下如何验证RMAN备份有效性，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

RMAN提供VALIDATE的命令，可以用于校验备份集的有效性，常用命令如下：

restore validate controlfile;

restore validate database;

验证命令会建议备份的存在性、完好性和可恢复性，帮助我们确认备份的有效与否。

比如验证控制文件和参数文件：

RMAN> restore validate controlfile;

Starting restore at 25-JAN-10

using target database control file instead of recovery catalog

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=388 devtype=DISK

channel ORA_DISK_1: starting validation of datafile backupset

channel ORA_DISK_1: reading from backup piece /opt/oracle/product/db10g/dbs/c-1341966532-20100125-01

channel ORA_DISK_1: restored backup piece 1

piece handle=/opt/oracle/product/db10g/dbs/c-1341966532-20100125-01 tag=TAG20100125T094817

channel ORA_DISK_1: validation complete, elapsed time: 00:00:02

Finished restore at 25-JAN-10

RMAN> restore validate spfile;

Starting restore at 25-JAN-10

using channel ORA_DISK_1

channel ORA_DISK_1: starting validation of datafile backupset

channel ORA_DISK_1: reading from backup piece /opt/oracle/product/db10g/dbs/c-1341966532-20100116-00

channel ORA_DISK_1: restored backup piece 1

piece handle=/opt/oracle/product/db10g/dbs/c-1341966532-20100116-00 tag=TAG20100116T033113

channel ORA_DISK_1: validation complete, elapsed time: 00:00:02

Finished restore at 25-JAN-10

验证全备份一般会很慢，谨慎试验：

RMAN> restore validate database

;

Starting restore at 25-JAN-10

using channel ORA_DISK_1

data file 22 will be created automatically during restore operation

channel ORA_DISK_1: starting validation of datafile backupset

channel ORA_DISK_1: reading from backup piece /data3/ordrbak/orderfullback_order_20100124_4691

channel ORA_DISK_1: restored backup piece 1

piece handle=/data3/ordrbak/orderfullback_order_20100124_4691 tag=order

channel ORA_DISK_1: validation complete, elapsed time: 00:02:36

channel ORA_DISK_1: starting validation of datafile backupset

channel ORA_DISK_1: reading from backup piece /data3/ordrbak/orderfullback_order_20100124_4692

channel ORA_DISK_1: restored backup piece 1

piece handle=/data3/ordrbak/orderfullback_order_20100124_4692 tag=order

channel ORA_DISK_1: validation complete, elapsed time: 00:01:45

channel ORA_DISK_1: starting validation of datafile backupset

channel ORA_DISK_1: reading from backup piece /data3/ordrbak/orderfullback_order_20100124_4693

channel ORA_DISK_1: restored backup piece 1

piece handle=/data3/ordrbak/orderfullback_order_20100124_4693 tag=order

channel ORA_DISK_1: validation complete, elapsed time: 00:00:26

channel ORA_DISK_1: starting validation of datafile backupset

channel ORA_DISK_1: reading from backup piece /data3/ordrbak/orderfullback_order_20100124_4694

channel ORA_DISK_1: restored backup piece 1

piece handle=/data3/ordrbak/orderfullback_order_20100124_4694 tag=order

channel ORA_DISK_1: validation complete, elapsed time: 00:00:56

channel ORA_DISK_1: starting validation of datafile backupset

channel ORA_DISK_1: reading from backup piece /data3/ordrbak/orderfullback_order_20100124_4695

channel ORA_DISK_1: restored backup piece 1

piece handle=/data3/ordrbak/orderfullback_order_20100124_4695 tag=order

channel ORA_DISK_1: validation complete, elapsed time: 00:00:07

channel ORA_DISK_1: starting validation of datafile backupset

channel ORA_DISK_1: reading from backup piece /data3/ordrbak/orderfullback_order_20100124_4696

channel ORA_DISK_1: restored backup piece 1

piece handle=/data3/ordrbak/orderfullback_order_20100124_4696 tag=order

channel ORA_DISK_1: validation complete, elapsed time: 00:00:04

channel ORA_DISK_1: starting validation of datafile backupset

channel ORA_DISK_1: reading from backup piece /data3/ordrbak/orderfullback_order_20100124_4697

channel ORA_DISK_1: restored backup piece 1

piece handle=/data3/ordrbak/orderfullback_order_20100124_4697 tag=order

channel ORA_DISK_1: validation complete, elapsed time: 00:00:07

failover to previous backup

data file 22 will be created automatically during restore operation

Finished restore at 25-JAN-10

验证命令并不会真正执行恢复，所以可以减去异机测试等的麻烦。

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