oracle 11g asm 磁碟組相容屬性

   從oracle 11g版本開始,asm磁碟組會有兩個新屬性來相容asm版本和資料庫版本

• COMPATIBLE.ASM - The minimum version of the ASM software that can access the disk group. In 11g, the default setting is 10.1.
• COMPATIBLE.RDBMS - The minimum COMPATIBLE database initialization parameter setting for any database instance that uses the disk group. In 11g, the default setting is 10.1.

1.建立asm磁碟組時可以指定對應版本

CREATE DISKGROUP data DISK '/dev/raw/*'
  ATTRIBUTE 'compatible.asm' = '11.1';

CREATE DISKGROUP data DISK '/dev/raw/*'
  ATTRIBUTE 'compatible.rdbms' = '11.1', 'compatible.asm' = '11.1';

2.如果沒加屬性資料庫和asm版本均預設為10.1

SQL>  SELECT group_number, name, compatibility, database_compatibility FROM v$asm_diskgroup;

GROUP_NUMBER NAME       COMPATIBILITY        DATABASE_COMPATIBILI
------------ ---------- -------------------- --------------------
           1 ASM_DG                         10.1.0.0.0           10.1.0.0.0
  
3.對已有的磁碟組進行屬性修改

ALTER DISKGROUP asm_dg SET ATTRIBUTE 'compatible.asm' = '11.1';
ALTER DISKGROUP asm_dg SET ATTRIBUTE 'compatible.rdbms' = '11.1';

4.檢查結果

COLUMN name FORMAT A10
COLUMN compatibility FORMAT A20
COLUMN database_compatibility FORMAT A20

SELECT group_number, name, compatibility, database_compatibility FROM v$asm_diskgroup;

GROUP_NUMBER NAME       COMPATIBILITY        DATABASE_COMPATIBILI
------------ ---------- -------------------- --------------------
           1 ASM_DG       11.1.0.0.0           11.1.0.0.0

1 row selected.

SQL>

COLUMN name FORMAT A20
COLUMN value FORMAT A20

SELECT group_number, name, value FROM v$asm_attribute ORDER BY group_number, name;

GROUP_NUMBER NAME                 VALUE
------------ -------------------- --------------------
           1 au_size              1048576
           1 compatible.asm       11.1.0.0.0
           1 compatible.rdbms     11.1
           1 disk_repair_time     3.6h

4 rows selected.

SQL>