分类目录归档：Oracle ASM

asm数据文件迁移(os–>asm)

发表于 2011 年 8 月 1 日 由 惜分飞 
--添加测试表空间
SQL> create tablespace xff datafile '/u01/oradata/xifenfei.dbf' size 10m autoextend on maxsize 100m;

Tablespace created.

--查看数据文件位置
SQL> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
+DATA/tasm/system01.dbf
+DATA/tasm/undotbs01.dbf
+DATA/tasm/sysaux01.dbf
+DATA/tasm/users01.dbf
+DATA/tasm/example01.dbf
/u01/oradata/xifenfei.dbf

6 rows selected.

--创建测试表
SQL> create table hr.a tablespace xff
  2  as
  3  select * from dba_tables;

Table created.

SQL> select count(*) from hr.a;

  COUNT(*)
----------
      1580
--转移数据文件位置
[oracle@localhost oradata]$ rman target /

Recovery Manager: Release 10.2.0.3.0 - Production on Mon Jun 27 04:30:22 2011

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

connected to target database: TASM (DBID=3032096031)

RMAN> sql 'alter tablespace xff offline';

using target database control file instead of recovery catalog
sql statement: alter tablespace xff offline

RMAN> backup as copy tablespace xff format '+DATA';

Starting backup at 27-JUN-11
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=132 devtype=DISK
channel ORA_DISK_1: starting datafile copy
input datafile fno=00006 name=/u01/oradata/xifenfei.dbf
output filename=+DATA/tasm/datafile/xff.269.754893121 tag=TAG20110627T043200 recid=2 stamp=754893123
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
Finished backup at 27-JUN-11

RMAN> switch tablespace xff to copy;

datafile 6 switched to datafile copy "+DATA/tasm/datafile/xff.269.754893121"

RMAN> sql 'alter tablespace xff online';

sql statement: alter tablespace xff online

--查看转移后的数据文件位置
SQL> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
+DATA/tasm/system01.dbf
+DATA/tasm/undotbs01.dbf
+DATA/tasm/sysaux01.dbf
+DATA/tasm/users01.dbf
+DATA/tasm/example01.dbf
+DATA/tasm/datafile/xff.269.754893121

6 rows selected.

--测试其中数据是否存在
SQL> select count(*) from hr.a;

  COUNT(*)
----------
      1580

--创建asm中文件别名
ASMCMD> mkalias  +DATA/tasm/datafile/xff.269.754893121 +DATA/tasm/xff01.dbf

--文件重命名
SQL> alter tablespace xff offline;

Tablespace altered.

SQL> alter database rename file '+DATA/tasm/datafile/xff.269.754893121' to '+DATA/tasm/xff01.dbf';

Database altered.

SQL> alter tablespace xff online;

Tablespace altered.

SQL> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
+DATA/tasm/system01.dbf
+DATA/tasm/undotbs01.dbf
+DATA/tasm/sysaux01.dbf
+DATA/tasm/users01.dbf
+DATA/tasm/example01.dbf
+DATA/tasm/xff01.dbf

6 rows selected.

--手工删除原来数据
[oracle@localhost oradata]$ rm xifenfei.dbf

说明：可以在rman移植数据文件位置的时候，同时处理好别名，然后对表空间重命名，实现只需要表空间离线一次

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ASM简单管理(2)

发表于 2011 年 7 月 31 日 由 惜分飞

1、磁盘组卸载/挂载

--查看当前磁盘组状态
SQL> select group_number,name,state,total_mb,free_mb from v$asm_diskgroup;

GROUP_NUMBER NAME                 STATE                    TOTAL_MB    FREE_MB
------------ -------------------- ---------------------- ---------- ----------
           1 ARCHIVELOG           MOUNTED                     12637      12585
           2 DATA                 MOUNTED                     10228       7644
           3 FLASHBACK            MOUNTED                      7836       7786
           4 DG2                  MOUNTED                      5114       5012
--卸载dg2磁盘组
SQL> alter diskgroup dg2 dismount;

Diskgroup altered.

SQL> select group_number,name,state,total_mb,free_mb from v$asm_diskgroup;

GROUP_NUMBER NAME                 STATE                    TOTAL_MB    FREE_MB
------------ -------------------- ---------------------- ---------- ----------
           1 ARCHIVELOG           MOUNTED                     12637      12585
           2 DATA                 MOUNTED                     10228       7644
           3 FLASHBACK            MOUNTED                      7836       7786
           0 DG2                  DISMOUNTED                      0          0
--挂载dg2磁盘组
SQL> alter diskgroup dg2 mount;

Diskgroup altered.

SQL> select group_number,name,state,total_mb,free_mb from v$asm_diskgroup;

GROUP_NUMBER NAME                 STATE                    TOTAL_MB    FREE_MB
------------ -------------------- ---------------------- ---------- ----------
           1 ARCHIVELOG           MOUNTED                     12637      12585
           2 DATA                 MOUNTED                     10228       7644
           3 FLASHBACK            MOUNTED                      7836       7786
           4 DG2                  MOUNTED                      5114       5012
--卸载所有磁盘组
SQL> alter diskgroup all dismount;

Diskgroup altered.

SQL> select group_number,name,state,total_mb,free_mb from v$asm_diskgroup;

GROUP_NUMBER NAME                 STATE                    TOTAL_MB    FREE_MB
------------ -------------------- ---------------------- ---------- ----------
           0 DATA                 DISMOUNTED                      0          0
           0 DG2                  DISMOUNTED                      0          0
           0 FLASHBACK            DISMOUNTED                      0          0
           0 ARCHIVELOG           DISMOUNTED                      0          0
--挂载所有磁盘组
SQL> alter diskgroup all mount;

Diskgroup altered.

SQL> select group_number,name,state,total_mb,free_mb from v$asm_diskgroup;

GROUP_NUMBER NAME                 STATE                    TOTAL_MB    FREE_MB
------------ -------------------- ---------------------- ---------- ----------
           2 DATA                 MOUNTED                     10228       7644
           3 DG2                  MOUNTED                      5114       5012
           4 FLASHBACK            MOUNTED                      7836       7786
           1 ARCHIVELOG           MOUNTED                     12637      12585
--如果当前磁盘组有实例在访问，则不能被卸载

SQL> alter diskgroup data dismount;
alter diskgroup data dismount
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15027: active use of diskgroup "DATA" precludes its dismount

2、磁盘组目录

--创建目录
SQL> alter diskgroup dg2 add directory '+DG2/CHENGFEI';

Diskgroup altered.
--使用asmcmd查看（export ORACLE_SID=+ASM;asmcmd进入)
ASMCMD> pwd
+DG2
ASMCMD> ls -l
Type  Redund  Striped  Time             Sys  Name
                                        N    CHENGFEI/
--目录重命名
SQL> alter diskgroup dg2 rename directory '+DG2/CHENGFEI' TO '+DG2/XIFENFEI';

Diskgroup altered.

ASMCMD> ls 
XIFENFEI/
--删除目录
SQL> alter diskgroup dg2 drop directory '+DG2/xifenfei';

Diskgroup altered.

ASMCMD> ls
ASMCMD>

3、文件别名

--添加别名
SQL> alter diskgroup dg2 add alias '+dg2/XIFENFEI' for '+dg2/tasm/datafile/XFF.256.754832383';

Diskgroup altered.
--使用asmcmd查看别名是否成功                                           
ASMCMD> pwd
+dg2
ASMCMD> ls -l
Type      Redund  Striped  Time             Sys  Name
                                            Y    TASM/
                                            N    XIFENFEI => +DG2/TASM/DATAFILE/XFF.256.754832383
--别名重命名
SQL> alter diskgroup dg2 rename alias '+DG2/XIFENFEI' TO '+DG2/FEIFEI.DBF';

Diskgroup altered.

                                            N    XIFENFEI => +DG2/TASM/DATAFILE/XFF.256.754832383
ASMCMD> ls -l
Type      Redund  Striped  Time             Sys  Name
                                            N    FEIFEI.DBF => +DG2/TASM/DATAFILE/XFF.256.754832383
 
                                           Y    TASM/
--删除别名
SQL> alter diskgroup dg2 drop alias '+dg2/feifei.dbf';

Diskgroup altered.

ASMCMD> ls -l
Type  Redund  Striped  Time             Sys  Name
                                        Y    TASM/

说明：
1）asmcmd命令行操作中，目录文件名不区分大小写，命令关键字区分大小写
2）磁盘组中的一个文件，最多只能建立一个别名可以通过v$asm_alias视图查看别名的相关信息
ASM简单管理(1)

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ASMCMD常用命令

发表于 2011 年 4 月 1 日 由 惜分飞

1、显示指定的ASM目录下ASM文件占用的所有磁盘空间
du

2、列出ASM目录下的内容及其属性
ls -ls

3、查看当前路径
pwd

4、打开目录
cd ../DATA

5、列出当前ASM客户端的信息
lsct

6、列出所有磁盘组及其属性
lsdg

7、列出数据文件信息
lsof

8、列出盘的信息
lsdsk

Note:大小写敏感

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