将Oracle 10g RAC 1的vip由192.168.2.11改为192.168.2.13,rac2的vip由192.168.2.12改为192.168.2.14.
将Oracle 10g RAC 1的vip由192.168.2.11改为192.168.2.13,rac2的vip由192.168.2.12改为192.168.2.14.
一、软硬件环境概述在虚拟机VMware GSX Server上安装两套redhet Enterprise-R4-U4系统rac1和rac2,虚拟共享存储,, 在此基础上搭建的oracle10g RAC环境。
1、 rac1两块网卡eth0:192.168.2.111,eth1:10.10.10.11
2、 rac2两块网卡eth0:192.168.2.112,eth1:10.10.10.12
/etc/hosts文件:
127.0.0.1
localhost
192.168.2.111
rac1.mycorpdomain.com
rac1
192.168.2.11
rac1-vip.mycorpdomain.com
rac1-vip
10.10.10.11
rac1-priv.mycorpdomain.com
rac1-priv
192.168.2.112
rac2.mycorpdomain.com
rac2
192.168.2.12
rac2-vip.mycorpdomain.com
rac2-vip
10.10.10.12
rac2-priv.mycorpdomain.com
rac2-priv
三、更改VIP 1、确认当前rac1和rac2的vip配置
#./srvctl config nodeapps –n rac1 –a
VIP exists.:/rac1-vip.mycorpdomain.com/192.168.2.11/255.255.255.0/eth0
#./srvctl config nodeapps –n rac2 –a
VIP exists.:/rac2-vip.mycorpdomain.com/192.168.2.12/255.255.255.0/eth0
2、在rac1上停依赖于vip的资源
#cd /u01/app/oracle/product/10.2.0/crs_1/bin
停数据库实例
#./srvctl stop instance –d devdb –i ora.devdb.devd1.inst
停数据库
#./srvctl stop database –d devdb
停ASM实例
#./srvctl stop asm –n rac1
停vip,gsd,listener,ons
#./srvctl stop nodeapps –n rac1
3、在rac2上停依赖于vip的资源
#cd /u01/app/oracle/product/10.2.0/crs_1/bin
停数据库实例
#./srvctl stop instance –d devdb –i ora.devdb.devd2.inst
停数据库
#./srvctl stop database –d devdb
停ASM实例
#./srvctl stop asm –n rac2
#./srvctl stop nodeapps –n rac2
4、更改hosts文件
127.0.0.1
localhost
192.168.2.111
rac1.mycorpdomain.com
rac1
192.168.2.13
rac1-vip.mycorpdomain.com
rac1-vip
10.10.10.11
rac1-priv.mycorpdomain.com
rac1-priv
192.168.2.112
rac2.mycorpdomain.com
rac2
192.168.2.14
rac2-vip.mycorpdomain.com
rac2-vip
10.10.10.12
rac2-priv.mycorpdomain.com
rac2-priv

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

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To optimize MySQL slow query, slowquerylog and performance_schema need to be used: 1. Enable slowquerylog and set thresholds to record slow query; 2. Use performance_schema to analyze query execution details, find out performance bottlenecks and optimize.

MySQL and SQL are essential skills for developers. 1.MySQL is an open source relational database management system, and SQL is the standard language used to manage and operate databases. 2.MySQL supports multiple storage engines through efficient data storage and retrieval functions, and SQL completes complex data operations through simple statements. 3. Examples of usage include basic queries and advanced queries, such as filtering and sorting by condition. 4. Common errors include syntax errors and performance issues, which can be optimized by checking SQL statements and using EXPLAIN commands. 5. Performance optimization techniques include using indexes, avoiding full table scanning, optimizing JOIN operations and improving code readability.


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