ORACLE---添加控制文件

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SQL> show parameter control
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NAME                                 TYPE        VALUE
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------------------------------------ ----------- ------------------------------
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control_file_record_keep_time        integer     7
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control_files                        string      /u01/oradata/sansom/control01.
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                                                 ctl, /u01/oradata/sansom/contr
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                                                 ol02.ctl, /u01/oradata/sansom/
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                                                 control03.ctl

目前控制文件有3个，接下来我们用创建PFILE直接修改PFILE文件内容的方法增加控制文件，并放在不同的路径 
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[oracle@gard3 dbs]$ pwd
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/u01/oracle/dbs
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[oracle@gard3 dbs]$ ll
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-rw-r-----  1 oracle oinstall  1536 Nov  4 08:45 orapwsansom
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-rw-r-----  1 oracle oinstall  2560 Nov 22 03:23 spfilesansom.ora

目前/u01/oracle/dbs并没有PFILE文件，我们来创建它
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SQL> create pfile from spfile;
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File created.
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SQL> !
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[oracle@gard3 dbs]$ ll
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total 76
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-rw-r--r--  1 oracle oinstall   974 Nov 22 03:36 initsansom.ora
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-rw-r-----  1 oracle oinstall  1536 Nov  4 08:45 orapwsansom
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-rw-r-----  1 oracle oinstall  2560 Nov 22 03:23 spfilesansom.ora


打开initsansom.ora文件直接添加'/u01/oradata/backup/control04.ctl',并保存 

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sansom.__db_cache_size=176160768
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sansom.__java_pool_size=4194304
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sansom.__large_pool_size=4194304
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sansom.__shared_pool_size=92274688
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sansom.__streams_pool_size=4194304
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*.audit_file_dest='/u01/admin/sansom/adump'
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*.background_dump_dest='/u01/admin/sansom/bdump'
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*.compatible='10.2.0.1.0'
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*.control_files='/u01/oradata/sansom/control01.ctl','/u01/oradata/sansom/control02.ctl','/u01/oradata/sansom/control03.ctl','/u01/oradata/backup/control04.ctl'
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*.core_dump_dest='/u01/admin/sansom/cdump'
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*.db_block_size=8192

拷贝任意一个控制文件到backup目录下，并关闭数据库：
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[oracle@gard3 dbs]$ cp /u01/oradata/sansom/control01.ctl /u01/oradata/backup/control04.ctl
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[oracle@gard3 dbs]$ exit
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exit
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SQL> shutdown immediate
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Database closed.
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Database dismounted.
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ORACLE instance shut down.

使用pfile重新启动数据库： 
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SQL> startup pfile='/u01/oracle/dbs/initsansom.ora'
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ORACLE instance started.
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Total System Global Area  285212672 bytes
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Fixed Size                  1218992 bytes
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Variable Size             104859216 bytes
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Database Buffers          176160768 bytes
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Redo Buffers                2973696 bytes
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Database mounted.
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Database opened.
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SQL> show parameter control
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NAME                                 TYPE        VALUE
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------------------------------------ ----------- ------------------------------
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control_file_record_keep_time        integer     7
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control_files                        string      /u01/oradata/sansom/control01.
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                                                 ctl, /u01/oradata/sansom/contr
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                                                 ol02.ctl, /u01/oradata/sansom/
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                                                 control03.ctl, /u01/oradata/ba
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                                                 ckup/control04.ctl
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SQL>