(原) Tablespaces, Datafiles, and Control Files
2007-12-23 21:56
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Tablespaces, Datafiles, and Control Files
(1) 表空间是逻辑存储单元,由一个或多个datafiles组成。
(2) 数据库的数据存储在datafiles中。
1 spaces
1.1 Bigfile Tablespace
增加了储存能力。通过提供datafile的透明性来简化管理
1.2 system tablespace
包含整个数据库的数据字典。
1.3 sysaux tablespace
system 表空间的辅助。提供不在system表空间的元数据。
1.4 Undo tablespaces
存储Undo 信息。
1.5 Default Temporary tablespace
If you drop all default temporary tablespaces, then the SYSTEM tablespace is used as
the default temporary tablespace.
1.6 Multiple Tablesapces
2 Datafile
2.1 Size of datafiles
2.2 offline datafiles
2.3 temporary datafiles
3 Control files
(1) 表空间是逻辑存储单元,由一个或多个datafiles组成。
(2) 数据库的数据存储在datafiles中。
1 spaces
1.1 Bigfile Tablespace
增加了储存能力。通过提供datafile的透明性来简化管理
1.2 system tablespace
包含整个数据库的数据字典。
1.3 sysaux tablespace
system 表空间的辅助。提供不在system表空间的元数据。
1.4 Undo tablespaces
存储Undo 信息。
1.5 Default Temporary tablespace
If you drop all default temporary tablespaces, then the SYSTEM tablespace is used as
the default temporary tablespace.
1.6 Multiple Tablesapces
2 Datafile
2.1 Size of datafiles
2.2 offline datafiles
2.3 temporary datafiles
3 Control files
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