知识大全 利用RMAN将数据库从文件系统迁移到ASM
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一 打开ASM实例
[oracle@ASM ~]$ echo $ORACLE_SID
+ASM
[oracle@ASM ~]$ sqlplus /nolog
SQL*Plus: Release Production on Mon Apr : :
Copyright (c) Oracle All rights reserved
SQL> conn / as sysdba
Connected to an idle instance
SQL> startup
ASM instance started
Total System Global Area bytes
Fixed Size bytes
Variable Size bytes
ASM Cache bytes
ASM diskgroups mounted
SQL> select name state from v$asm_diskgroup;
NAME STATE
DATA MOUNTED
DGROUP MOUNTED
二 修改目标数据库(TOASM)的SPFILE
SQL> ALTER SYSTEM SET CONTROL_FILES= +DGROUP SCOPE=SPFILE;
System altered
SQL> ALTER SYSTEM SET DB_CREATE_FILE_DEST= +DGROUP SCOPE=SPFILE;
System altered
三 关闭目标数据库
SQL> SHUTDOWN IMMEDIATE
Database closed
Database dismounted
ORACLE instance shut down
四 通过RMAN连接到目标数据库 并启动到NOMOUNT状态
[oracle@ASM admin]$ rman target /
Recovery Manager: Release Production on Mon Apr : :
Copyright (c) Oracle All rights reserved
connected to target database (not started)
RMAN> startup nomount
Oracle instance started
Total System Global Area bytes
Fixed Size bytes
Variable Size bytes
Database Buffers bytes
Redo Buffers bytes
RMAN>
五 还原控制文件到ASM磁盘组 并将数据库启动到MOUNT状态
RMAN> RESTORE CONTROLFILE FROM /u /oradata/TOASM/control ctl ;
Starting restore at APR
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_
channel ORA_DISK_ : sid= devtype=DISK
channel ORA_DISK_ : copied control file copy
output filename=+DGROUP /toasm/controlfile/backup
Finished restore at APR
RMAN> ALTER DATABASE MOUNT;
database mounted
released channel: ORA_DISK_
RMAN>
六 利用RMAN复制数据文件到ASM磁盘组
RMAN > BACKUP AS COPY DATABASE FORMAT +DGROUP ;
Starting backup at APR
allocated channel: ORA_DISK_
channel ORA_DISK_ : sid= devtype=DISK
channel ORA_DISK_ : starting datafile copy
input datafile fno= name=/u /oradata/TOASM/system dbf
output filename=+DGROUP /toasm/datafile/system tag=TAG T recid= stamp=
channel ORA_DISK_ : datafile copy plete elapsed time: : :
channel ORA_DISK_ : starting datafile copy
input datafile fno= name=/u /oradata/TOASM/sysaux dbf
output filename=+DGROUP /toasm/datafile/sysaux tag=TAG T recid= stamp=
channel ORA_DISK_ : datafile copy plete elapsed time: : :
channel ORA_DISK_ : starting datafile copy
input datafile fno= name=/u /oradata/TOASM/example dbf
output filename=+DGROUP /toasm/datafile/example tag=TAG T recid= stamp=
channel ORA_DISK_ : datafile copy plete elapsed time: : :
channel ORA_DISK_ : starting datafile copy
input datafile fno= name=/u /oradata/TOASM/undotbs dbf
output filename=+DGROUP /toasm/datafile/undotbs tag=TAG T recid= stamp=
channel ORA_DISK_ : datafile copy plete elapsed time: : :
channel ORA_DISK_ : starting datafile copy
input datafile fno= name=/u /oradata/TOASM/users dbf
output filename=+DGROUP /toasm/datafile/users tag=TAG T recid= stamp=
channel ORA_DISK_ : datafile copy plete elapsed time: : :
channel ORA_DISK_ : starting datafile copy
copying current control file
output filename=+DGROUP /toasm/controlfile/backup tag=TAG T recid= stamp=
channel ORA_DISK_ : datafile copy plete elapsed time: : :
channel ORA_DISK_ : starting full datafile backupset
channel ORA_DISK_ : specifying datafile(s) in backupset
including current SPFILE in backupset
channel ORA_DISK_ : starting piece at APR
channel ORA_DISK_ : finished piece at APR
piece handle=+DGROUP /toasm/backupset/ _ _ /nnsnf _tag t _ tag=TAG T ment=NONE
channel ORA_DISK_ : backup set plete elapsed time: : :
Finished backup at APR
RMAN>
七 利用RMAN的SWITCH 命令修改控制文件内数据文件的指针 使其指向新位置
RMAN> SWITCH DATABASE TO COPY;
datafile switched to datafile copy +DGROUP /toasm/datafile/system
datafile switched to datafile copy +DGROUP /toasm/datafile/undotbs
datafile switched to datafile copy +DGROUP /toasm/datafile/sysaux
datafile switched to datafile copy +DGROUP /toasm/datafile/users
datafile switched to datafile copy +DGROUP /toasm/datafile/example
RMAN> RECOVER DATABASE;
Starting recover at APR
using channel ORA_DISK_
starting media recovery
media recovery plete elapsed time: : :
Finished recover at APR
RMAN>
八 打开数据库
RMAN> ALTER DATABASE OPEN;
database opened
RMAN>
九 迁移临时文件
由于临时文件不会被迁移 所以我们只需要删除原来的增加新的就可以
SQL> SELECT NAME FROM V$TEMPFILE;
NAME
/u /oradata/TOASM/temp dbf
SQL> ALTER TABLESPACE TEMP ADD TEMPFILE +DGROUP ;
Tablespace altered
SQL> ALTER TABLESPACE TEMP DROP TEMPFILE /u /oradata/TOASM/temp dbf ;
Tablespace altered
SQL> SELECT NAME FROM V$TEMPFILE;
NAME
+DGROUP /toasm/tempfile/temp
SQL>
十 增加新的ONLINE REDOLOGS 到ASM
SQL> SELECT * FROM V$LOG;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
YES INACTIVE APR
NO CURRENT APR
YES INACTIVE APR
SQL> ALTER DATABASE ADD LOGFILE +DGROUP SIZE M;
Database altered
SQL> ALTER DATABASE ADD LOGFILE +DGROUP SIZE M;
Database altered
SQL> ALTER DATABASE ADD LOGFILE +DGROUP SIZE M;
Database altered
SQL> ALTER DATABASE DROP LOGFILE GROUP ;
Database altered
SQL> ALTER SYSTEM SWITCH LOGFILE;
System altered
SQL> ALTER SYSTEM SWITCH LOGFILE;
System altered
SQL> SQL> ALTER DATABASE DROP LOGFILE GROUP ;
ALTER DATABASE DROP LOGFILE GROUP
*
ERROR at line :
ORA : log needed for crash recovery of instance TOASM (thread )
ORA : online log thread : /u /oradata/TOASM/redo log
SQL> ALTER SYSTEM CHECKPOINT;
System altered
SQL> ALTER DATABASE DROP LOGFILE GROUP ;
Database altered
SQL>ALTER DATABASE DROP LOGFILE GROUP ;
Database altered
SQL> SELECT MEMBER FROM V$LOGFILE;
MEMBER
+DGROUP /toasm/onlinelog/group_
+DGROUP /toasm/onlinelog/group_
+DGROUP /toasm/onlinelog/group_
SQL>
十一 最后删除原来的数据库文件
[oracle@ASM ~]$ ls lh /u /oradata/TOASM/
total M
rw r oracle oinstall M Apr : control ctl
rw r oracle oinstall M Apr : control ctl
rw r oracle oinstall M Apr : control ctl
rw r oracle oinstall M Apr : example dbf
rw r oracle oinstall M Apr : redo log
rw r oracle oinstall M Apr : redo log
rw r oracle oinstall M Apr : redo log
rw r oracle oinstall M Apr : sysaux dbf
rw r oracle oinstall M Apr : system dbf
rw r oracle oinstall M Apr : undotbs dbf
rw r oracle oinstall M Apr : users dbf
[oracle@ASM ~]$ rm rf /u /oradata/TOASM/*
[oracle@ASM ~]$ ls lh /u /oradata/TOASM/
total
[oracle@ASM ~]$
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