RAC添加表空间数据文件的时候,如果误把数据文件放置在本地,另外一个节点访问数据文件上面的数据时就会提示无法锁定该数据文件,导致出现异常,下面介绍两种处理办法。
1、当前数据文件和表空间信息
node1执行
SQL> show parameter instance NAME TYPE VALUE ------------------------------------ --------------------------------- ------------------------------ active_instance_count integer cluster_database_instances integer 3 instance_groups string instance_name string devdb1 instance_number integer 1 instance_type string RDBMS open_links_per_instance integer 4 parallel_instance_group string parallel_server_instances integer 3 SQL> col tablespace_name for a20 SQL> select file_name,tablespace_name from dba_data_files; FILE_NAME TABLESPACE_NAME -------------------------------------------------- -------------------- +DATA/devdb/datafile/users.259.940551847 USERS +DATA/devdb/datafile/undotbs1.258.940551847 UNDOTBS1 +DATA/devdb/datafile/sysaux.257.940551847 SYSAUX +DATA/devdb/datafile/system.256.940551845 SYSTEM +DATA/devdb/datafile/undotbs2.264.940552089 UNDOTBS2 SQL>
2、在节点1向表空间users添加数据文件
node1执行
SQL> alter tablespace users add datafile '/u01/app/oracle/user01.dbf' size 50M autoextend off; Tablespace altered. SQL>
3、在users表空间创建测试表
node1执行
SQL> SQL> create table t (id int) tablespace users; Table created. SQL> SQL> insert into t select level id from dual connect by level <100000; 99999 rows created. SQL> commit; Commit complete. SQL> select count(*) from t; COUNT(*) ---------- 99999 SQL>
4、在节点2访问测试表T
node2执行
SQL> show parameter instance NAME TYPE VALUE ------------------------------------ --------------------------------- ------------------------------ active_instance_count integer cluster_database_instances integer 3 instance_groups string instance_name string devdb2 instance_number integer 2 instance_type string RDBMS open_links_per_instance integer 4 parallel_instance_group string parallel_server_instances integer 3 SQL> select count(*) from t; select count(*) from t * ERROR at line 1: ORA-01157: cannot identify/lock data file 6 - see DBWR trace file ORA-01110: data file 6: '/u01/app/oracle/user01.dbf' SQL>
可以看到因为users表空间对应的数据文件存放在节点1的本地目录,实例2访问测试表T时就会提示无法锁定该文件。
5、把本地数据文件offline
node1执行
SQL> alter database datafile '/u01/app/oracle/user01.dbf' offline; Database altered. SQL> select file_name from dba_data_files; FILE_NAME -------------------------------------------------------------------------------- +DATA/devdb/datafile/users.259.940551847 +DATA/devdb/datafile/undotbs1.258.940551847 +DATA/devdb/datafile/sysaux.257.940551847 +DATA/devdb/datafile/system.256.940551845 +DATA/devdb/datafile/undotbs2.264.940552089 /u01/app/oracle/user01.dbf 6 rows selected.
6、使用rman迁移数据文件
node1执行
[oracle@rac1]$ rman target / Recovery Manager: Release 11.2.0.3.0 - Production on Mon Jun 4 18:43:57 2018 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. connected to target database: DEVDB (DBID=845281939) RMAN> copy datafile '/u01/app/oracle/user01.dbf' to '+DATA/devdb/datafile/user01.dbf'; Starting backup at 2018/06/04 18:44:51 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=158 instance=devdb1 device type=DISK channel ORA_DISK_1: starting datafile copy input datafile file number=00006 name=/u01/app/oracle/user01.dbf output file name=+DATA/devdb/datafile/user01.dbf tag=TAG20180604T184453 RECID=3 STAMP=977942703 channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:16 Finished backup at 2018/06/04 18:45:10 RMAN>
7、恢复并online数据文件
node1执行
SQL> alter database rename file '/u01/app/oracle/user01.dbf' to '+DATA/devdb/datafile/user01.dbf'; Database altered. SQL> recover datafile '+DATA/devdb/datafile/user01.dbf'; Media recovery complete. SQL> alter database datafile '+DATA/devdb/datafile/user01.dbf' online; Database altered. SQL>
8、实例2 访问测试表T
SQL> show parameter instance NAME TYPE VALUE ------------------------------------ --------------------------------- ------------------------------ active_instance_count integer cluster_database_instances integer 3 instance_groups string instance_name string devdb2 instance_number integer 2 instance_type string RDBMS open_links_per_instance integer 4 parallel_instance_group string parallel_server_instances integer 3 SQL> select count(*) from T; 《========可以正常访问 COUNT(*) ---------- 99999 SQL>
11g或者以上可以使用asmcmd copy本地文件到磁盘组
前5步一样,从第6步开始使用如下步骤
6、使用asmcmd迁移数据文件
node执行(grid 用户)
ASMCMD> ls DEVDB/ scan-cluster/ snapcf_devdb1.f test/ ASMCMD> cd DEVDB ASMCMD> cd datafile ASMCMD> pwd +DATA/DEVDB/datafile ASMCMD> cp '/u01/app/oracle/user01.dbf' ./ copying /u01/app/oracle/user01.dbf -> +DATA/DEVDB/datafile/user01.dbf ASMCMD> ASMCMD>
7、恢复并online数据文件
SQL> SQL> alter database rename file '/u01/app/oracle/user01.dbf' to '+DATA/devdb/datafile/user01.dbf'; Database altered. SQL> SQL> SQL> recover datafile '+DATA/devdb/datafile/user01.dbf'; Media recovery complete. SQL> alter database datafile '+DATA/devdb/datafile/user01.dbf' online; Database altered. SQL>
8、实例2查询测试表T
SQL> show parameter instance NAME TYPE VALUE ------------------------------------ --------------------------------- ------------------------------ active_instance_count integer cluster_database_instances integer 3 instance_groups string instance_name string devdb2 instance_number integer 2 instance_type string RDBMS open_links_per_instance integer 4 parallel_instance_group string parallel_server_instances integer 3 SQL> select count(*) from T; COUNT(*) ---------- 99999