Oracle中password file orapwd的作用及说明(二)
0 bytes
Database Buffers 25165824 bytes
Redo Buffers 667648 bytes
ORA-01990: error opening password file '/opt/oracle/product/9.2.0/dbs/orapw'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
此时可以通过orapwd重建口令文件来解决
此处我们恢复口令文件既可
SQL> !
[oracle@jumper oracle]$ mv $ORACLE_HOME/dbs/orapwhsjf.bak orapwhsjf
[oracle@jumper oracle]$ exit
exit
SQL> alter database open;
Database altered.
SQL>
大致就是如此.
5. remote_login_passwordfile = shared
我们看一下Oracle9i文档中的说明:
SHARED
More than one database can use a password file. However, the only user recognized by the password file is SYS.
意思是说多个数据库可以共享一个口令文件,但是只可以识别一个用户:SYS
SQL> select * from v$pwfile_users;
USERNAME SYSDB SYSOP
------------------------------ ----- -----
SYS TRUE TRUE
SQL> grant sysdba to eygle;
grant sysdba to eygle
*
ERROR at line 1:
ORA-01994: GRANT failed: cannot add users to public password file
SQL> show parameter password
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
remote_login_passwordfile string SHARED
我们看到,此时的口令文件中是不能添加用户的.
很多人的疑问在于:口令文件的缺省名称是orapw,怎么能够共享
实际上是这样的: Oracle数据库在启动时,首先查找的是orapw的口令文件,如果该文件不存在,则开始查找,orapw的口令文件
如果口令文件命名为orapw,多个数据库就可以共享.
我们看一下测试:
[oracle@jumper dbs]$ sqlplus "/ as sysdba"
SQL*Plus: Release 9.2.0.3.0 - Production on Tue Jul 6 09:40:34 2004
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.3.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.3.0 - Production
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> !
[oracle@jumper dbs]$ ls
hsjf initdw.ora inithsjf.ora init.ora lkHSJF orapwhsjf spfilehsjf.ora
[oracle@jumper dbs]$ mv orapwhsjf orapwhsjf.bak
[oracle@jumper dbs]$ exit
exit
SQL> startup
ORACLE instance started.
Total System Global Area 235999908 bytes
Fixed Size 451236 bytes
Variable Size 201326592 bytes
Database Buffers 33554432 bytes
Redo Buffers 667648 bytes
ORA-01990: error opening password file '/opt/oracle/product/9.2.0/dbs/orapw'--这是最后查找的文件
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
我们建立orapw口令文件,这时候可以打开数据库.
SQL> !
[oracle@jumper dbs]$ ls
hsjf initdw.ora inithsjf.ora init.ora lkHSJF orapwhsjf.bak spfilehsjf.ora
[oracle@jumper dbs]$ cp orapwhsjf.bak orapw
[oracle@jumper dbs]$ exit
exit
SQL> alter database open;
Database altered.
SQL> show parameter passw
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
remote_login_passwordfile string SHARED
SQL>
那么你可能会有这样的疑问,多个Exclusive的数据库是否可以共享一个口令文件(orapw)呢
我们继续这个实验:
SQL> show parameter password
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
remote_login_passwordfil