需求：
恢复1天前(05/06/2021 08:05:05)数据库内一个用户的数据。
环境说明：
DB:Oracle 11204 RAC
OS:AIX 7.1
操作：
1.由于之前只有rman备份，没有逻辑备份，只能进行rman恢复。 2.全库有3T多，数据量较大，恢复机剩余空间不到1T，无法进行全库恢复。 3.查看用户所在表空间很小，只有300G，考虑只恢复用户数据所在表空间，在加上system,sysaux,undotbs表空间，不恢复其他业务用户的表空间。 4.启动数据库时，把其他没有恢复的表空间offline后，就可以正常打开数据库。
具体操作如下：
1.恢复控制文件
###Rman Script:
run {
SET DBID 3311060971;
allocate channel ch1 type 'sbt_tape'
PARMS="###省略###"
TRACE 0;
restore controlfile from autobackup until time = "TO_DATE('05/06/2021 08:05:05','MM/DD/YYYY HH24:MI:SS')" ;
}
exit;
问题:
此处恢复控制文件的方式是有问题的，因为最终是想将数据库恢复到05/06/2021 08:05:05时间点。 而在恢复控制文件时，由于并没有05/06/2021 08:05:05这一时刻的控制文件备份。 在恢复过程中没有报错，而是直接恢复了离05/06/2021 08:05:05时间点最近的一次控制文件进行恢复。 这就导致了控制文件恢复的时间点提前了，很多归档等备份信息不全，最终导致数据库在recovery时提示找不到归档，恢复出的数据库也提前了。 实际上要恢复的控制文件备份的时间可以稍往后推一些。
恢复日志如下：
RMAN> 2> 3> 4> 5> 6> 7> allocated channel: ch1 channel ch1: SID=541 device type=SBT_TAPE channel ch1: CommVault Systems for Oracle: Version 11.0.0(BUILD80) sent command to channel: ch1 Starting restore at May 04 2021 17:34:56 channel ch1: looking for AUTOBACKUP on day: 20210506 channel ch1: AUTOBACKUP found: c-3311060971-20210506-01 channel ch1: restoring control file from AUTOBACKUP c-3311060971-20210506-01 channel ch1: control file restore from AUTOBACKUP complete output file name=/oradata/chenj/control01 output file name=/oradata/chenj/control02 Finished restore at May 04 2021 17:40:07 released channel: ch1 RMAN> Recovery Manager complete.
2.执行restore
run {
allocate channel ch1 type 'sbt_tape'
PARMS="###省略###"
TRACE 0;
set newname for datafile '+AA_BB_CJCXX_DATA/chenjch/datafile/cccc_xxxxxx_data_01.dbf' to '/oradata/chenj/cccc_xxxxxx_data_01.dbf';
set newname for datafile '+AA_BB_CJCXX_DATA/chenjch/datafile/cccc_xxxxxx_data_02.dbf' to '/oradata/chenj/cccc_xxxxxx_data_02.dbf';
set newname for datafile '+AA_BB_CJCXX_DATA/chenjch/datafile/sysaux.302.1042642447' to '/oradata/chenj/sysaux.302.1042642447';
set newname for datafile '+AA_BB_CJCXX_DATA/chenjch/datafile/system.285.1042646103' to '/oradata/chenj/system.285.1042646103';
set newname for datafile '+AA_BB_CJCXX_DATA/chenjch/datafile/undotbs1.301.1042643625' to '/oradata/chenj/undotbs1.301.1042643625';
set newname for datafile '+AA_BB_CJCXX_DATA/chenjch/datafile/undotbs2.322.1042633105' to '/oradata/chenj/undotbs2.322.1042633105';
set newname for datafile '+AA_BB_CJCXX_DATA/chenjch/datafile/users.284.1042646223' to '/oradata/chenj/users.284.1042646223';
restore (tablespace 'SYSTEM','SYSAUX','USERS','UNDOTBS1','UNDOTBS2','AAAA_XXXXX_UUUU') until time = "TO_DATE('05/06/2021 08:05:05','MM/DD/YYYY HH24:MI:SS')" ;
switch datafile all;
}
exit;
日志：
RMAN> 2> 3> 4> 5> 6> 7> 8> 9> 10> 11> 12> 13> 14> 15> 16> 17> 18> allocated channel: ch1 channel ch1: SID=464 device type=SBT_TAPE channel ch1: CommVault Systems for Oracle: Version 11.0.0(BUILD80) allocated channel: ch2 channel ch2: SID=541 device type=SBT_TAPE channel ch2: CommVault Systems for Oracle: Version 11.0.0(BUILD80) sent command to channel: ch1 sent command to channel: ch2 executing command: SET NEWNAME executing command: SET NEWNAME executing command: SET NEWNAME executing command: SET NEWNAME executing command: SET NEWNAME executing command: SET NEWNAME executing command: SET NEWNAME Starting restore at May 04 2021 18:30:45 new media label is V_241064_3217058 for piece 484407_chenj_aj038d7e_1_1 new media label is V_241064_3217091 for piece 484407_chenj_ak038ehq_1_1 new media label is V_241064_3217092 for piece 484407_chenj_al038emc_1_1 new media label is V_241064_3217061 for piece 484407_chenj_ai038d7d_1_1 new media label is V_241064_3217058 for piece 484407_chenj_aj038d7e_1_1 new media label is V_241064_3217091 for piece 484407_chenj_ak038ehq_1_1 new media label is V_241064_3217092 for piece 484407_chenj_al038emc_1_1 new media label is V_241064_3217061 for piece 484407_chenj_ai038d7d_1_1 channel ch1: starting datafile backup set restore channel ch1: specifying datafile(s) to restore from backup set channel ch1: restoring datafile 00001 to /oradata/chenj/system.285.1042646103 channel ch1: restoring datafile 00004 to /oradata/chenj/undotbs2.322.1042633105 channel ch1: reading from backup piece 484407_chenj_aj038d7e_1_1 channel ch2: starting datafile backup set restore channel ch2: specifying datafile(s) to restore from backup set channel ch2: restoring datafile 00051 to /oradata/chenj/cccc_xxxxxx_data_01.dbf channel ch2: reading from backup piece 484407_chenj_ai038d7d_1_1 channel ch2: piece handle=484407_chenj_ai038d7d_1_1 tag=TAG20210506T040045 channel ch2: restored backup piece 1 channel ch2: restore complete, elapsed time: 00:31:05 channel ch2: starting datafile backup set restore channel ch2: specifying datafile(s) to restore from backup set channel ch2: restoring datafile 00002 to /oradata/chenj/sysaux.302.1042642447 channel ch2: reading from backup piece 484407_chenj_ak038ehq_1_1 channel ch1: piece handle=484407_chenj_aj038d7e_1_1 tag=TAG20210506T040045 channel ch1: restored backup piece 1 channel ch1: restore complete, elapsed time: 01:05:11 channel ch1: starting datafile backup set restore channel ch1: specifying datafile(s) to restore from backup set channel ch1: restoring datafile 00005 to /oradata/chenj/users.284.1042646223 channel ch1: restoring datafile 00003 to /oradata/chenj/undotbs1.301.1042643625 channel ch1: restoring datafile 00052 to /oradata/chenj/cccc_xxxxxx_data_02.dbf channel ch1: reading from backup piece 484407_chenj_al038emc_1_1 channel ch2: piece handle=484407_chenj_ak038ehq_1_1 tag=TAG20210506T040045 channel ch2: restored backup piece 1 channel ch2: restore complete, elapsed time: 01:02:30 channel ch1: piece handle=484407_chenj_al038emc_1_1 tag=TAG20210506T040045 channel ch1: restored backup piece 1 channel ch1: restore complete, elapsed time: 00:57:05 Finished restore at May 04 2021 20:33:24 datafile 1 switched to datafile copy input datafile copy RECID=12 STAMP=1077050007 file name=/oradata/chenj/system.285.1042646103 datafile 2 switched to datafile copy input datafile copy RECID=13 STAMP=1077050008 file name=/oradata/chenj/sysaux.302.1042642447 datafile 5 switched to datafile copy input datafile copy RECID=14 STAMP=1077050008 file name=/oradata/chenj/users.284.1042646223 datafile 3 switched to datafile copy input datafile copy RECID=15 STAMP=1077050008 file name=/oradata/chenj/undotbs1.301.1042643625 datafile 4 switched to datafile copy input datafile copy RECID=16 STAMP=1077050008 file name=/oradata/chenj/undotbs2.322.1042633105 datafile 51 switched to datafile copy input datafile copy RECID=17 STAMP=1077050008 file name=/oradata/chenj/cccc_xxxxxx_data_01.dbf datafile 52 switched to datafile copy input datafile copy RECID=18 STAMP=1077050008 file name=/oradata/chenj/cccc_xxxxxx_data_02.dbf released channel: ch1 released channel: ch2 RMAN> Recovery Manager complete.
3.执行recovery
run {
allocate channel ch1 type 'sbt_tape'
PARMS="###省略###"
TRACE 0;
recover database skip tablespace 'DATA_TBS1','DATA_TBS2','DATA_TBS3','DATA_TBS4','DATA_TBS5','...'
until time = "TO_DATE('05/06/2021 08:05:05','MM/DD/YYYY HH24:MI:SS')";
}
exit;
日志：
RMAN> 2> 3> 4> 5> 6> 7> 8> 9> 10> 11> allocated channel: ch1 channel ch1: SID=541 device type=SBT_TAPE channel ch1: CommVault Systems for Oracle: Version 11.0.0(BUILD80) allocated channel: ch2 channel ch2: SID=618 device type=SBT_TAPE channel ch2: CommVault Systems for Oracle: Version 11.0.0(BUILD80) sent command to channel: ch1 sent command to channel: ch2 Starting recover at May 04 2021 20:33:57 ###没有restore出来的数据文件自动执行了offline操作### Executing: alter database datafile 8 offline Executing: alter database datafile 9 offline Executing: alter database datafile 11 offline Executing: alter database datafile 13 offline Executing: alter database datafile 14 offline Executing: alter database datafile 15 offline Executing: alter database datafile 16 offline Executing: alter database datafile 17 offline Executing: alter database datafile 18 offline Executing: alter database datafile 20 offline Executing: alter database datafile 21 offline Executing: alter database datafile 24 offline Executing: alter database datafile 25 offline Executing: alter database datafile 26 offline Executing: alter database datafile 27 offline Executing: alter database datafile 28 offline Executing: alter database datafile 29 offline Executing: alter database datafile 30 offline Executing: alter database datafile 31 offline Executing: alter database datafile 32 offline Executing: alter database datafile 33 offline Executing: alter database datafile 34 offline Executing: alter database datafile 35 offline Executing: alter database datafile 36 offline Executing: alter database datafile 37 offline Executing: alter database datafile 38 offline Executing: alter database datafile 39 offline Executing: alter database datafile 40 offline Executing: alter database datafile 41 offline Executing: alter database datafile 42 offline Executing: alter database datafile 43 offline Executing: alter database datafile 44 offline Executing: alter database datafile 45 offline Executing: alter database datafile 46 offline Executing: alter database datafile 47 offline Executing: alter database datafile 48 offline Executing: alter database datafile 49 offline Executing: alter database datafile 50 offline Executing: alter database datafile 54 offline Executing: alter database datafile 55 offline Executing: alter database datafile 56 offline Executing: alter database datafile 57 offline Executing: alter database datafile 58 offline Executing: alter database datafile 59 offline Executing: alter database datafile 60 offline Executing: alter database datafile 63 offline Executing: alter database datafile 64 offline Executing: alter database datafile 65 offline Executing: alter database datafile 66 offline Executing: alter database datafile 67 offline Executing: alter database datafile 71 offline Executing: alter database datafile 72 offline Executing: alter database datafile 73 offline Executing: alter database datafile 74 offline Executing: alter database datafile 75 offline Executing: alter database datafile 76 offline Executing: alter database datafile 77 offline Executing: alter database datafile 78 offline Executing: alter database datafile 79 offline Executing: alter database datafile 80 offline Executing: alter database datafile 83 offline Executing: alter database datafile 84 offline Executing: alter database datafile 85 offline Executing: alter database datafile 86 offline Executing: alter database datafile 87 offline Executing: alter database datafile 88 offline Executing: alter database datafile 89 offline Executing: alter database datafile 90 offline Executing: alter database datafile 91 offline Executing: alter database datafile 92 offline Executing: alter database datafile 93 offline Executing: alter database datafile 94 offline Executing: alter database datafile 95 offline Executing: alter database datafile 96 offline Executing: alter database datafile 97 offline Executing: alter database datafile 98 offline Executing: alter database datafile 99 offline Executing: alter database datafile 100 offline Executing: alter database datafile 101 offline Executing: alter database datafile 102 offline Executing: alter database datafile 103 offline Executing: alter database datafile 104 offline Executing: alter database datafile 105 offline Executing: alter database datafile 106 offline Executing: alter database datafile 107 offline Executing: alter database datafile 108 offline Executing: alter database datafile 109 offline Executing: alter database datafile 110 offline Executing: alter database datafile 111 offline Executing: alter database datafile 112 offline Executing: alter database datafile 113 offline Executing: alter database datafile 114 offline Executing: alter database datafile 115 offline Executing: alter database datafile 116 offline Executing: alter database datafile 6 offline Executing: alter database datafile 7 offline Executing: alter database datafile 23 offline Executing: alter database datafile 10 offline Executing: alter database datafile 12 offline Executing: alter database datafile 19 offline Executing: alter database datafile 22 offline Executing: alter database datafile 53 offline Executing: alter database datafile 68 offline Executing: alter database datafile 69 offline Executing: alter database datafile 70 offline Executing: alter database datafile 82 offline Executing: alter database datafile 81 offline Executing: alter database datafile 61 offline Executing: alter database datafile 62 offline starting media recovery new media label is V_241064_3217122 for piece 484407_chenj_ap038g7b_1_1 new media label is V_241064_3217123 for piece 484407_chenj_aq038gaa_1_1 new media label is V_241064_3217122 for piece 484407_chenj_ap038g7b_1_1 new media label is V_241064_3217123 for piece 484407_chenj_aq038gaa_1_1 channel ch1: starting archived log restore to default destination channel ch1: restoring archived log archived log thread=1 sequence=180348 channel ch1: restoring archived log archived log thread=2 sequence=182735 channel ch1: restoring archived log archived log thread=1 sequence=180349 channel ch1: restoring archived log archived log thread=1 sequence=180350 channel ch1: reading from backup piece 484407_chenj_ap038g7b_1_1 channel ch2: starting archived log restore to default destination channel ch2: restoring archived log archived log thread=2 sequence=182736 channel ch2: reading from backup piece 484407_chenj_aq038gaa_1_1 channel ch2: piece handle=484407_chenj_aq038gaa_1_1 tag=TAG20210506T045152 channel ch2: restored backup piece 1 channel ch2: restore complete, elapsed time: 00:00:07 channel ch1: piece handle=484407_chenj_ap038g7b_1_1 tag=TAG20210506T045152 channel ch1: restored backup piece 1 channel ch1: restore complete, elapsed time: 00:02:25 archived log file name=/oradata/chenj/arch/1_180348_864829931.dbf thread=1 sequence=180348 archived log file name=/oradata/chenj/arch/2_182735_864829931.dbf thread=2 sequence=182735 archived log file name=/oradata/chenj/arch/1_180349_864829931.dbf thread=1 sequence=180349 archived log file name=/oradata/chenj/arch/1_180350_864829931.dbf thread=1 sequence=180350 archived log file name=/oradata/chenj/arch/2_182736_864829931.dbf thread=2 sequence=182736 unable to find archived log archived log thread=1 sequence=180351 released channel: ch1 released channel: ch2 RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of recover command at 05/07/2021 08:37:27 RMAN-06054: media recovery requesting unknown archived log for thread 1 with sequence 180351 and starting SCN of 542755860991 RMAN> Recovery Manager complete.
recover最后一步报错了，提示找不到180351。 查看180351归档生成时间，发现是5月5日的归档，说明数据也只恢复到了5月5日，丢失了1天的数据。 出现这个问题的原因就是前面提到的，控制文件恢复的时间不对，导致控制文件记录的备份信息不全。
解决方案：
由于恢复完成后，数据库执行了open read only操作，而并没有执行open resetlogs操作，说明数据库还可以继续执行recovery操作，
之前还原的数据文件不需要在执行restore操作了。
具体操作：
1.停库备份控制文件。 2.恢复出较新的控制文件(时间略大约05/06/2021 08:05:05)。 3.用新的控制文件挂载数据库。 4.restore出需要的归档文件。 5.停库，用备份的控制文件挂载数据库(不在需要转换路径了)。 6.将新恢复出的归档日志注册到老控制文件中。 7.继续执行recovery操作。
###chenjuchao 20210711 11:30###