1.缺省的Oracle命名
当使用ASM + OMF治理时，Oracle会自动分配文件名称，创建相应的文件。
我们创建表空间的工作可以简化为:
create tablespace tablespace_name;
一个命令。
以下是Oracle的缺省命名示例:
$ sqlplus "/ as sysdba"
SQL*Plus: Release 10.1.0.3.0 - ProdUCtion on Thu Jun 16 09:26:22 2005
Copyright (c) 1982, 2004, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.1.0.3.0 - 64bit Production
With the Partitioning and Data Mining options
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
+DATADG/mmsdb/datafile/system.259.3
+DATADG/mmsdb/datafile/undotbs1.258.3
+DATADG/mmsdb/datafile/sysaux.257.3
+DATADG/mmsdb/datafile/users.256.3
+DATADG/mmsdb/datafile/platform.278.1
+DATADG/mmsdb/datafile/gateway.279.1
6 rows selected.
2.自定义名称和文件大小创建
假如我们想自定义文件大小及名称，可以使用如下方法创建:
SQL> create tablespace cumail datafile '+DATADG/mmsdb/datafile/cumail'size 100m;
Tablespace created.
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
+DATADG/mmsdb/datafile/system.259.3
+DATADG/mmsdb/datafile/undotbs1.258.3
+DATADG/mmsdb/datafile/sysaux.257.3
+DATADG/mmsdb/datafile/users.256.3
+DATADG/mmsdb/datafile/platform.278.1
+DATADG/mmsdb/datafile/gateway.279.1
+DATADG/mmsdb/datafile/cumail
7 rows selected.
SQL> drop tablespace cumail including contents and datafiles;
Tablespace dropped.
3.创建ASSM治理表空间
需要指定segment space子句:
SQL> create tablespace cumail
2 segment space management auto;
Tablespace created.
SQL> select name from v$datafile;
NAME
------------------------------------------------------
+DATADG/mmsdb/datafile/system.259.3
+DATADG/mmsdb/datafile/undotbs1.258.3
+DATADG/mmsdb/datafile/sysaux.257.3
+DATADG/mmsdb/datafile/users.256.3
+DATADG/mmsdb/datafile/platform.278.1
+DATADG/mmsdb/datafile/gateway.279.1
+DATADG/mmsdb/datafile/cumail.280.3
7 rows selected.
SQL> select tablespace_name,extent_management,segment_space_management from dba_tablespaces;
TABLESPACE_NAME EXTENT_MAN SEGMEN
------------------------------ ---------- ------
SYSTEM LOCAL MANUAL
UNDOTBS1 LOCAL MANUAL
SYSAUX LOCAL AUTO
TEMP LOCAL MANUAL
USERS LOCAL AUTO
PLATFORM LOCAL MANUAL
GATEWAY LOCAL MANUAL
CUMAIL LOCAL AUTO
8 rows selected.
4.更改文件大小
SQL> alter database datafile '+DATADG/mmsdb/datafile/cumail.280.3' resize 300m;
Database altered.
SQL>
5.设置UNIFORM SIZE属性
假如需要设置extent的一些属性，那么必须显示的指定。
SQL> create tablespace ticket extent management local uniform size 128k segment space management auto;
Tablespace created.
SQL> select name ,bytes/1024/1024 from v$datafile;
NAME BYTES/1024/1024
---------------------------------------- ---------------
+DATADG/mmsdb/datafile/system.259.3 450
+DATADG/mmsdb/datafile/undotbs1.258.3 25
+DATADG/mmsdb/datafile/sysaux.257.3 330
+DATADG/mmsdb/datafile/users.256.3 5
+DATADG/mmsdb/datafile/platform.278.1 1000
+DATADG/mmsdb/datafile/gateway.279.1 1000
+DATADG/mmsdb/datafile/cumail.280.3 300
+DATADG/mmsdb/datafile/ticket.281.1 100
8 rows selected.
SQL> alter database datafile '+DATADG/mmsdb/datafile/ticket.281.1' resize 300m;
Database altered.
简单操作，供参考。
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