理解ASM（七）ASM迁移
环境：
sys@ORCL> select * from v$version;BANNER----------------------------Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prodsys@ORCL> !unameLinux
⑴ 修改控制文件的位置
sys@ORCL> show parameter control_filesNAME TYPE VALUE------------------------------------ ----------- ------------------------------control_files string /u01/app/oracle/oradata/ORCL/c ontrolfile/o1_mf_8050hgfp_.ctl , /u01/app/oracle/flash_recove ry_area/ORCL/controlfile/o1_mf _8050hgqh_.ctlsys@ORCL> alter database backup controlfile to '/home/oracle/ctlasm.ctl';sys@ORCL> alter system set control_files='+WATER' scope=spfile;sys@ORCL> shutdown immediate;
⑵ 数据文件迁移
RMAN> startup nomountRMAN> restore controlfile from '/home/oracle/ctlasm.ctl';RMAN> alter database mount;RMAN> backup as copy database format '+WATER'; RMAN> recover database;RMAN> switch database to copy;
⑶ 日志文件迁移
idle> conn / as sysdbaidle> alter database open resetlogs;idle> alter database add logfile group 4 '+WATER/redo04.log' size 50m;idle> alter database add logfile group 5 '+WATER/redo05.log' size 50m;idle> alter database add logfile group 6 '+WATER/redo06.log' size 50m;idle> select group#,status from v$log; GROUP# STATUS---------- ---------------- 1 UNUSED 2 CURRENT 3 UNUSED 4 UNUSED 5 UNUSED 6 UNUSEDidle> alter system switch logfile;idle> alter system switch logfile;idle> alter system switch logfile;idle> select group#,status from v$log; GROUP# STATUS---------- ---------------- 1 ACTIVE 2 ACTIVE 3 ACTIVE 4 ACTIVE 5 ACTIVE 6 CURRENTidle> alter system checkpoint;idle> alter database drop logfile group 1;idle> alter database drop logfile group 2;idle> alter database drop logfile group 3;idle> select member from v$logfile;MEMBER----------------------------------------------------------------+WATER/redo04.log+WATER/redo05.log+WATER/redo06.log
⑷ 临时文件迁移
sys@ORCL> select file_name,tablespace_name from dba_temp_files;FILE_NAME TABLESPACE_NAME----------------------------- ------------------------------/u01/app/oracle/oradata/ORCL/datafile/o1_mf_temp_8050j34j_.tmp TEMPsys@ORCL> alter tablespace temp add tempfile '+WATER';sys@ORCL> select file_name,tablespace_name from dba_temp_files;FILE_NAME TABLESPACE_NAME----------------------------- ------------------------------+WATER/orcl/tempfile/temp.265.798479421 TEMP/u01/app/oracle/oradata/ORCL/datafile/o1_mf_temp_8050j34j_.tmp TEMPsys@ORCL> alter tablespace temp drop tempfile '/u01/app/oracle/oradata/ORCL/datafile/o1_mf_temp_8050j34j_.tmp';
⑸ 修改db_create_file_dest，db_recovery_file_dest，db_recovery_file_dest_size 的值
sys@ORCL> alter system set db_create_file_dest='+WATER/ORCL/ORADATA' scope=spfile;sys@ORCL> alter system set db_recovery_file_dest='+WATER' scope=spfile;sys@ORCL> alter system set db_recovery_file_dest_size=1 G scope=spfile;sys@ORCL> alter database backup controlfile to '+WATER'; --迁移时，只有一个控制文件sys@ORCL> show parameter controlNAME TYPE VALUE------------------------------------ ----------- ------------------------------control_file_record_keep_time integer 7control_files string +WATER/orcl/controlfile/curren t.256.798477831
⑹ 修改参数文件并迁移spfile
sys@ORCL> alter system set control_files='+WATER/ORCL/ORADATA/CONTROL01.CTL','+WATER/ORCL/ORADATA/CONTROL02.CTL' scope=spfile;sys@ORCL> create spfile='+WATER/ORCL/spfileorcl.ora' from pfile;[oracle@localhost dbs]$ rm -i spfileorcl.ora[oracle@localhost dbs]$ vim initorcl.ora [oracle@localhost dbs]$ tail -f initorcl.ora *.job_queue_processes=10*.open_cursors=300*.pga_aggregate_target=139460608*.processes=150*.remote_login_passwordfile='NONE'*.sga_target=418381824*.undo_management='AUTO'*.undo_tablespace='UNDOTBS1'*.user_dump_dest='/u01/app/oracle/admin/orcl/udump'SPFILE='+WATER/ORCL/spfileorcl.ora'
⑺ 检查ASM实例和数据库实例连接情况
ASMCMD> lsctDB_Name Status Software_Version Compatible_version Instance_Nameorcl CONNECTED 10.2.0.1.0 10.2.0.1.0 orcl
小结：
第一次迁移时失败，原因是仅作学习之用，磁盘组空间太小，大家如果空间富裕，不妨慷慨些。
