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最近先后帮客户做了两套从虚拟化环境到物理机的数据库迁移，都是Linux系统，Oracle 11.2.0.4的RAC，最终选定ADG方案实现迁移，简单高效。 问题1:备库Redo的一个member路径有误按流程做完发现备库在open后，Redo的一个member路径有误，都是+FRA磁盘组： SQL> select member from v$logfile;MEMBER ----------------------------------------------------------- +DATA/jingyus/onlinelog/group_1.383.1050758359 +FRA +DATA/jingyus/onlinelog/group_2.384.1050758359 +FRA +DATA/jingyus/onlinelog/group_3.385.1050758359 +FRA +DATA/jingyus/onlinelog/group_4.386.1050758359 +FRA +DATA/jingyus/onlinelog/group_5.397.1050758359 +FRA +DATA/jingyus/onlinelog/group_6.398.1050758361 MEMBER ----------------------------------------------------------- +FRA +DATA/jingyus/onlinelog/group_7.399.1050758361 +FRA +DATA/jingyus/onlinelog/group_8.400.1050758361 +FRA +DATA/jingyus/standbylog/standby_group_101.log +DATA/jingyus/standbylog/standby_group_102.log +DATA/jingyus/standbylog/standby_group_103.log +DATA/jingyus/standbylog/standby_group_104.log +DATA/jingyus/standbylog/standby_group_105.log +DATA/jingyus/standbylog/standby_group_201.log MEMBER ---------------------------------------------------------- +DATA/jingyus/standbylog/standby_group_202.log +DATA/jingyus/standbylog/standby_group_203.log +DATA/jingyus/standbylog/standby_group_204.log +DATA/jingyus/standbylog/standby_group_205.log 26 rows selected. 这样的路径不全，也无法使用常规命令删除掉。 --convert:SQL> show parameter convertNAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_file_name_convert string jingyu, jingyus log_file_name_convert string +fra/jingyu, +arch/jingyus, jingyu, jingyus 确认符合实际要求，没有问题。 检查db_recovery相关参数： SQL> show parameter db_recoveryNAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_recovery_file_dest string +FRA db_recovery_file_dest_size big integer 90G 果然是这里有问题，新环境应该是+ARCH磁盘组，而且客户这里的新规范是不配置此参数，这里将参数去掉，重启实例生效： SQL> alter system reset db_recovery_file_dest_size;System altered.SQL> alter system reset db_recovery_file_dest;System altered.SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down.SQL> startup mount;ORACLE instance started. Total System Global Area 7.4826E+10 bytes Fixed Size 2261048 bytes Variable Size 1.3959E+10 bytes Database Buffers 6.0666E+10 bytes Redo Buffers 199049216 bytes Database mounted.SQL> show parameter db_recoverNAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_recovery_file_dest string db_recovery_file_dest_size big integer 0SQL> 问题2:switch database to copy报错RMAN-6571上面改完之后，已经有问题的member并不会自己修复，需要去主库生成适用于备库的控制文件，在备库进行恢复： --standby controlfile primary:RMAN> backup current controlfile for standby format '/tmp/std_ctl.bak';scp to standby. standby: shutdown immediate startup nomountRMAN> restore standby controlfile from '/tmp/std_ctl.bak';alter database mount; 此时数据文件的名字因为OMF并不一样，convert转换的只有jingyu->jingyus，下面是示例： selct name from v$datafile; select member from v$Logfile; NAME -------------------------------------------------------------------------------- +DATA/jingyu/datafile/dmb_ts.381.1046616217 +DATA/jingyu/datafile/dmb_ts.383.1047808801 +DATA/jingyu/datafile/dmo_ts.384.1048122001 +DATA/jingyu/datafile/dmb_ts.385.1048755601 +DATA/jingyu/datafile/dmb_ts.386.1049724001 +DATA/jingyu/datafile/rpm.387.1049986803 116 rows selected. --由于配置了db_file_name_convert 参数： NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_file_name_convert string jingyu, jingyus --会按上面设置的规则转换： NAME -------------------------------------------------------------------------------- +DATA/jingyus/datafile/dmb_ts.381.1046616217 +DATA/jingyus/datafile/dmb_ts.383.1047808801 +DATA/jingyus/datafile/dmo_ts.384.1048122001 +DATA/jingyus/datafile/dmb_ts.385.1048755601 +DATA/jingyus/datafile/dmb_ts.386.1049724001 +DATA/jingyus/datafile/rpm.387.1049986803 116 rows selected. 但实际上我们同步过来的数据文件是这样： +DATA/jingyus/datafile/dmb_ts.342.1050704211 +DATA/jingyus/datafile/dmb_ts.363.1050706625 +DATA/jingyus/datafile/dmo_ts.364.1050706641 +DATA/jingyus/datafile/dmb_ts.365.1050706649 +DATA/jingyus/datafile/dmb_ts.366.1050706655 +DATA/jingyus/datafile/rpm.367.1050706663 116 rows selected. 最直接的方式是通过数据库的rename file 命令进行一一更正，但是比较麻烦，有一个通用的技巧就是将这些真实的文件catalog到rman中，将以copy的方式识别，然后直接switch到copy，就实现了更名的目的，且不容易出错： catalog start with '+DATA/jingyus/datafile'; switch database to copy; 结果10号文件报错RMAN-6571，跳过10号文件，也是其他文件接连报错，看oerr的解释： $ oerr rman 65716571, 1, "datafile %d does not have recoverable copy" // *Cause: The SWITCH command with the option TO COPY was specified but // the datafile has no valid copy to switch to. // *Action: Verify whether the datafile has a valid datafile copy. 顺手还去查了MOS文档
也没找到有效的解决方案。后来走了些弯路，又尝试做了一次备库控制文件的创建，效果依旧。 SQL> select file#, name, checkpoint_change# from v$datafile_header; FILE# NAME CHECKPOINT_CHANGE# ------------------------------ ------------------------------------------------------------------ ------------------------------ 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 +DATA/jingyus/datafile/dmb_ts01.dbf 98520735063 11 +DATA/jingyus/datafile/dmb_ts02.dbf 98520735063 FILE# NAME CHECKPOINT_CHANGE# ------------------------------ ------------------------------------------------------------------ ------------------------------ 12 +DATA/jingyus/datafile/dmb_ts03.dbf 98520735063 13 +DATA/jingyus/datafile/dmb_ts04.dbf 98520735063 14 +DATA/jingyus/datafile/dmo_ts01.dbf 98520735063 15 +DATA/jingyus/datafile/dmo_ts02.dbf 98520735063 16 +DATA/jingyus/datafile/dmo_ts03.dbf 98520735063 17 +DATA/jingyus/datafile/etl_ts01.dbf 98520735063 18 +DATA/jingyus/datafile/rpm01.dbf 98520735063 19 +DATA/jingyus/datafile/use01.dbf 98520735063 20 +DATA/jingyus/datafile/dms_ts01.dbf 98520735063 21 0 22 0 ...省略后面无问题的显示。 再次验证下问题文件数，就是有这11个： SQL> select checkpoint_change#, count(*) from v$datafile_Header group by checkpoint_change#; CHECKPOINT_CHANGE# COUNT(*) ------------------------------ ------------------------------ 0 105 98520757598 11 确认后，就只需要将需要switch的文件列出来： switch datafile 1,2,3,4,5,6,7,8,9,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101 to copy; 再次查询： SQL> set num 30SQL> select checkpoint_change#, count(*) from v$datafile_Header group by checkpoint_change#; CHECKPOINT_CHANGE# COUNT(*) ------------------------------ ------------------------------ 98520757598 116 此时开库，名字也都是OK： SQL> alter database open;Database altered.SQL> select member from v$logfile;MEMBER --------------------------------------------------------- +DATA/jingyus/onlinelog/group_1.257.950284165 +ARCH/jingyus/onlinelog/group_1.257.950284167 +DATA/jingyus/onlinelog/group_2.258.950284167 +ARCH/jingyus/onlinelog/group_2.258.950284169 +DATA/jingyus/onlinelog/group_3.265.950286045 +ARCH/jingyus/onlinelog/group_3.259.950286047 +DATA/jingyus/onlinelog/group_4.266.950286047 +ARCH/jingyus/onlinelog/group_4.260.950286049 +DATA/jingyus/onlinelog/group_5.286.959014699 +ARCH/jingyus/onlinelog/group_5.266.959014703 +DATA/jingyus/onlinelog/group_6.287.959014717 MEMBER --------------------------------------------------------- +ARCH/jingyus/onlinelog/group_6.273.959014719 +DATA/jingyus/onlinelog/group_7.288.959014729 +ARCH/jingyus/onlinelog/group_7.277.959014731 +DATA/jingyus/onlinelog/group_8.289.959014753 +ARCH/jingyus/onlinelog/group_8.269.959014755 +DATA/jingyus/standbylog/standby_group_101.log +DATA/jingyus/standbylog/standby_group_102.log +DATA/jingyus/standbylog/standby_group_103.log +DATA/jingyus/standbylog/standby_group_104.log +DATA/jingyus/standbylog/standby_group_105.log +DATA/jingyus/standbylog/standby_group_201.log +DATA/jingyus/standbylog/standby_group_202.log +DATA/jingyus/standbylog/standby_group_203.log +DATA/jingyus/standbylog/standby_group_204.log +DATA/jingyus/standbylog/standby_group_205.log 26 rows selected. 然后启动备库的mrp时，会自动删除+ARCH 下的路径，这个应该就是因为我们前面去掉了db_recover的相关设置： --recover ,+ARCH auto deleted..SQL> select member from v$logfile;MEMBER -------------------------------------------------------- +DATA/jingyus/onlinelog/group_1.397.1050759359 +DATA/jingyus/onlinelog/group_2.398.1050759359 +DATA/jingyus/onlinelog/group_3.399.1050759359 +DATA/jingyus/onlinelog/group_4.400.1050759361 +DATA/jingyus/onlinelog/group_5.401.1050759361 +DATA/jingyus/onlinelog/group_6.402.1050759361 +DATA/jingyus/onlinelog/group_7.403.1050759361 +DATA/jingyus/onlinelog/group_8.404.1050759363 +DATA/jingyus/standbylog/standby_group_101.log +DATA/jingyus/standbylog/standby_group_102.log +DATA/jingyus/standbylog/standby_group_103.log +DATA/jingyus/standbylog/standby_group_104.log +DATA/jingyus/standbylog/standby_group_105.log +DATA/jingyus/standbylog/standby_group_201.log +DATA/jingyus/standbylog/standby_group_202.log +DATA/jingyus/standbylog/standby_group_203.log +DATA/jingyus/standbylog/standby_group_204.log +DATA/jingyus/standbylog/standby_group_205.log 18 rows selected. 至此，遇到的问题就都解决了。松一口气，等待晚上配合切换即可。 |
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