最近在做NBU ORACLE備份的恢復測試，執行恢復時報錯ORA-27211: Failed to load Media Management Library，具體處理過程如下：
一、錯誤信息

執行命令：

run {
ALLOCATE CHANNEL ch00 TYPE SBT_TAPE;
send ‘NB_ORA_CLIENT=192.168.x.x‘;
send ‘NB_ORA_SERV=nbu5230‘;
restore controlfile from ‘/ctrl_dTESTDB_u0at7lkpa_s10_p1_t981127978‘;
release channel ch00;
}

報錯信息：

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of allocate command on ch00 channel at 07/10/2018 16:16:09
ORA-19554: error allocating device, device type: SBT_TAPE, device name:
ORA
 
-27211: Failed to load Media Management Library
Additional information: 2

二、錯誤原因

由於數據庫的Lib庫不包含NBU的庫文件，所以執行rman恢復時報錯

三、解決方案

將NBU的庫文件放入Oracle庫文件目錄下即可

[oracle@node1 oracle]$ ln -s /usr/openv/netbackup/bin/libobk.so64 /U01/app/oracle/product/11.2.0.4/lib/libobk.so
[oracle@node1 oracle]$ sbttest /etc/hosts

[oracle@node1 oracle
 
]$ sbttest /etc/hosts
The sbt function pointers are loaded from libobk.so library.
-- sbtinit succeeded
-- sbtinit (2nd time) succeeded
sbtinit: Media manager supports SBT API version 2.0
sbtinit: Media manager is version 5.0.0.0
sbtinit: vendor description string=Veritas NetBackup for Oracle - Release 7.7.2 (2016011116)
sbtinit: allocated sbt context area of 8 bytes
sbtinit: proxy copy is supported
-- sbtinit2 succeeded
-- regular_backup_restore starts ................................

四、知識擴展

1.NBU數據庫恢復腳本

run {

allocate channel t1 type ‘sbt_tape‘;

allocate channel t2 type ‘sbt_tape‘;

allocate channel t3 type ‘sbt_tape‘;

send ‘NB_ORA_CLIENT=192.168.x.x‘;

send ‘NB_ORA_SERV=nbu5230‘;

set until sequence 12 thread 1;

restore database;

#switch datafile all;

recover database;

release channel t1;

release channel t2;

release channel t3;

}

2.歸檔日誌恢復

run {

allocate channel t1 type ‘sbt_tape‘;

allocate channel t2 type ‘sbt_tape‘;

send ‘NB_ORA_CLIENT=192.168.x.x‘;

send ‘NB_ORA_SERV=nbu5230‘;

restore archivelog from sequence 8 until sequence 12 INCARNATION ALL;

release channel t1;

release channel t2;

}

3.其他恢復

更改還原路徑：

RMAN> set archivelog destination to ‘/u01/backup‘;

還原全部備份歸檔：

RMAN> restore archivelog all;

歸檔日誌範圍恢復：

RMAN> restore archivelog from sequence 8 until sequence 12;

RMAN> restore archivelog sequence between 8 and 12;

從低sequence開始恢復：

RMAN> restore archivelog from sequence 5;

RMAN> restore archivelog low sequence 5;

從高sequnece截止恢復：

RMAN> restore archivelog until sequence 110;

RMAN> restore archivelog high sequence 108;

按時間恢復：

RMAN> restore archivelog from time ‘sysdate-7‘;

Oracle案例12——NBU Oracle恢復