一、ASM磁盘和磁盘组管理
1、创建磁盘组
create diskgroup DG2 EXTERNAL REDUNDANCY DISK ‘ORCL:A1′;
Note:1)磁盘名称需要大写
2)磁盘名称使用V$asm_disk.path
2、磁盘组中添加磁盘
alter diskgroup dg2 add disk ‘ORCL:A2′;
Note:磁盘名称使用V$asm_disk.path
3、磁盘组中删除磁盘
alter diskgroup dg2 drop disk ‘a1′;
Note:磁盘名称使用的是V$asm_disk.name
4、删除磁盘组
drop diskgroup dg2 including contents;
二、ASM相关视图
1、查看是否有数据库实例连接上ASM实例
select instance_name,db_name,status from v$asm_client;
2、记录BALANCE操作
select operation,state,power,actual,sofar from v$asm_operation;
3、ASM DISK信息
select path, state, total_mb, free_mb from v$asm_disk;
4、ASM DISKGROUP信息
select name,state,type,total_mb,free_mb from v$asm_diskgroup;
三、ASM和表空间管理
1、ASM中创建表空间
create tablespace xff datafile ‘+DG2′ SIZE 100M;
2、ASM表空间中添加数据文件
alter tablespace xff add datafile ‘+dg2′ size 10m;
3、ASM表空间中删除数据文件
alter tablespace xff drop datafile ‘+DG2/xff/datafile/xff.257.747278679′;
或者
alter tablespace xff drop datafile 7;
4、删除表空间
drop tablespace xff including contents;
1、磁盘组卸载/挂载
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--查看当前磁盘组状态 SQL> select group_number,name,state,total_mb,free_mb from v$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
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--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
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--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
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/31448824/viewspace-2139460/ ，如需转载，请注明出处，否则将追究法律责任。
