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使用 Oracle Recovery Manager （ RMAN ）执行块级恢复

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您可以将 SnapManager 配置为在 Oracle 工具 Recovery Manager （ RMAN ）中对其备份进行目录，以便使用 RMAN 执行块级恢复。RMAN 可以使用数据库的控制文件或单独的恢复目录数据库作为其存储库。

  1. 要使用 SnapManager 执行完全脱机备份，请输入以下命令：

    SMO backup create -offline-full-profileprofile_name-labelbackup_label_name-verbose

    其中：

    • profile_name 是与备份关联的配置文件的名称

    • backup_label-name 是备份标签的名称

smo backup create -offline -full -profile profile_monthly
-label full_backup -verbose

+
SMO-07109 [INFO ]: Cataloguing all files in backup set with RMAN
TAG=SMC_full_backup_1158773581857, RMAN=ES0/controlfile.
...
SMO-13037 [INFO ]: Successfully completed operation: Backup
SMO-13048 [INFO ]: Operation Status: SUCCESS
SMO-13049 [INFO ]: Elapsed Time: 0:02:20.506
Operation Id [ff8080810dcc47e3010dcc47eb7a0001] succeeded.
+

  1. 要验证备份是否已使用 RMAN 进行编目，请在数据库主机的 RMAN 提示符处输入以下命令：

    列出数据复制标记 tag tag tag ： name ；

  2. 要验证数据库并确定是否有任何块损坏，请输入以下命令：

    dbv file=user01.dbf

    以下输出显示两个页面已损坏：

    DBVERIFY: Release 10.2.0.1.0 - Production on Wed Sep 20 13:35:44 2006
Copyright (c) 1982, 2005, Oracle. All rights reserved.
DBVERIFY - Verification starting : FILE = user01.dbf
Page 625 is marked corrupt
Corrupt block relative dba: 0x01400271 (file 5, block 625)
Bad header found during dbv:
Data in bad block:
type: 240 format: 6 rdba: 0xed323b81
last change scn: 0x6f07.faa74628 seq: 0x87 flg: 0x02
spare1: 0x60 spare2: 0x5 spare3: 0xef7d
consistency value in tail: 0xa210fe71
check value in block header: 0x13c7
block checksum disabled...
Page 627 is marked corrupt
Corrupt block relative dba: 0x01400273 (file 5, block 627)
Bad header found during dbv:
Data in bad block:
type: 158 format: 7 rdba: 0x2101e16d
last change scn: 0xe828.42414628 seq: 0xb4 flg: 0xff
spare1: 0xcc spare2: 0x81 spare3: 0x8665
consistency value in tail: 0x46d20601
check value in block header: 0x1a84
computed block checksum: 0x6c30
DBVERIFY - Verification complete
Total Pages Examined : 1280
Total Pages Processed (Data) : 1123
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing (Index): 0
Total Pages Processed (Other): 34
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 120
Total Pages Marked Corrupt: 2
Total Pages Influx : 0
Highest block SCN : 1337349 (0.1337349)

  3. 要使备份中的文件可在主机上访问并可供 RMAN 访问，请使用以下命令挂载备份：

    SMO backup mount -profileprofile_name-labelLabel-verbose

    smo backup mount -profile SALES1 -label full_backup -verbose

SMO-13046 [INFO ]: Operation GUID 8abc013111b9088e0111b908a7560001 starting on Profile SALES1
SMO-08052 [INFO ]: Beginning to connect mount(s) [E:\logs,F:\data] from logical snapshot SMO_SALES1_hsdb1_F_C_1_8abc013111a450480111a45066210001.
SMO-08025 [INFO ]: Beginning to connect mount E:\logs from snapshot SMO_SALES1_hsdb1_F_C_1_8abc013111a450480111a45066210001_0 of volume hs_logs.
SMO-08027 [INFO ]: Finished connecting mount E:\logs from snapshot SMO_SALES1_hsdb1_F_C_1_8abc013111a450480111a45066210001_0 of volume hs_logs.
SMO-08025 [INFO ]: Beginning to connect mount F:\data from snapshot SMO_SALES1_hsdb1_F_C_1_8abc013111a450480111a45066210001_0 of volume hs_data.
SMO-08027 [INFO ]: Finished connecting mount F:\data from snapshot SMO_SALES1_hsdb1_F_C_1_8abc013111a450480111a45066210001_0 of volume hs_data.
SMO-08053 [INFO ]: Finished connecting mount(s) [E:\logs,F:\data] from logical snapshot SMO_SALES1_hsdb1_F_C_1_8abc013111a450480111a45066210001.
SMO-13037 [INFO ]: Successfully completed operation: Backup Mount
SMO-13048 [INFO ]: Operation Status: SUCCESS
SMO-13049 [INFO ]: Elapsed Time: 0:01:00.981
Operation Id [8abc013111b9088e0111b908a7560001] succeeded.

  4. 要恢复块，请在 RMAN 中输入以下命令：

    块恢复数据文件 "`E ： \path\file.dbf` " block block_id ，来自标记 backup_RMAN_tag

    RMAN> blockrecover datafile
‘E:\sys\file01.dbf’ block 625, 626, 627
from tag SMO_full_backup_1158773581857;

Starting blockrecover at 20-SEP-08 using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=153 devtype=DISK
channel ORA_DISK_1: restoring block(s) from datafile copy
 C:\myfs\user01.dbf
starting media recovery
media recovery complete, elapsed time: 00:00:01
Finished blockrecover at 20-SEP-08

  5. 要验证块是否已修复，请使用以下命令：

    dbv file=filename.dbf

    以下输出显示没有页面损坏：

    dbv FILE=user01.dbf

DBVERIFY: Release 10.2.0.1.0 - Production on Wed Sep 20 13:40:01 2008
Copyright (c) 1982, 2008, Oracle. All rights reserved.
DBVERIFY - Verification starting : FILE = user01.dbf
DBVERIFY - Verification complete
Total Pages Examined : 1280
Total Pages Processed (Data) : 1126
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing (Index): 0
Total Pages Processed (Other): 34
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 120
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Highest block SCN : 1337349 (0.1337349)

    已修复并还原所有损坏的块。