DB2数据库实例创建与删除 学习笔记

以root身份执行 $DB2HOME/instance/db2idrop -f 实例名，注意一定要加-f，否则不会删除实例下面sqllib文件。如果不幸忘了，执行db2icrt，会报sqllib文件存在的错误，即使先删掉这个文件也不行，执行一下db2icrt，就会生成一部分sqllib，进入死胡同，这个是由于用实例用户登录造成的，也许有个db2profile文件在登录时搞怪，该怎么办呢？看我的吧！用一个非实例的用户登录，su成root，然后再删掉sqllib，试试再db2icrt，问题解决了：）

创建db2 实例和创建库的方法大致分为两类！一类是图形界面db2setup 创建一种是CLI创建！此处只描述一下CLI方式至于图形界面请大家搜索一下吧！
db2 创建实例 创建数据库

1.创建实例用户
mkdir /db2/db2test 创建实例用户目录
smitty user
选择Add a User
* User NAME                                          [db2test]                                                             
User ID                                                   []                                                                    
ADMINISTRATIVE USER?                       false                                                               
Primary GROUP                                     [db2iadm1]                                                           
Group SET                                           [staff]                                                              
ADMINISTRATIVE GROUPS                   []                                                                   
ROLES                                                         []                                                                   
Another user can SU TO USER?            true                                                                
SU GROUPS                                          [ALL]                                                                
HOME directory                                     [/db2/db2test]
Initial PROGRAM                                    [/usr/bin/ksh]

2.创建实例 DB2_install=/usr/opt/db2_08_01/instance
./db2icrt -u db2test db2test

3.创建数据库
su - db2test
db2start     #此处不执行启动实例将报:SQL1032N No start database manager command was issued. SQLSTATE=57019
db2 create db db2test

4.删除数据库
db2 drop db db2test
db2stop

5.删除实例
cd DB2_install
./db2idrop -f db2test # -f参数一定要添加否则删除完了会报错！

6.删除用户
smitty user
选择Remove a User
* User NAME                                          [db2test]                                                           +
Remove AUTHENTICATION information?                  yes

删除用户目录
rm -rf db2test