ITPUX技术网

交流 . 资讯 . 分享
Make progress together!
Oracle数据库DBA高级工程师培训视频
Oracle数据库培训-备份恢复-性能优化-集群容灾
mysql数据库视频教程

关于ORACLE RAC集群私网网卡用直接还是交换机连接的问题

内容发布:风哥| 发布时间:2014-1-21 23:01:24
关于ORACLE RAC集群私网网卡(心跳网络)用直接还是交换机连接的问题,现在就官方的建议如下:
Frequently Asked Questions (Doc ID 220970.1)

Is crossover cable supported as an interconnect with RAC on any platform ?
NO. CROSS OVER CABLES ARE NOT SUPPORTED. The requirement is to use a switch:


Detailed Reasons:

1) cross-cabling limits the expansion of RAC to two nodes

2) cross-cabling is unstable:


a) Some NIC cards do not work properly with it. They are not able to negotiate the DTE/DCE clocking, and will thus not function. These NICS were made cheaper by assuming that the switch was going to have the clock. Unfortunately there is no way to know which NICs do not have that clock.

b) Media sense behaviour on various OS's (most notably Windows) will bring a NIC down when a cable is disconnected. Either of these issues can lead to cluster instability and lead to ORA-29740 errors (node evictions).

Due to the benefits and stability provided by a switch, and their afforability ($200 for a simple 16 port GigE switch), and the expense and time related to dealing with issues when one does not exist, this is the only supported configuration.

From a purely technology point of view Oracle does not care if the customer uses cross over cable or router or switches to deliver a message. However, we know from experience that a lot of adapters misbehave when used in a crossover configuration and cause a lot of problems for RAC. Hence we have stated on certify that we do not support crossover cables to avoid false bugs and finger pointing amongst the various parties: Oracle, Hardware vendors, Os vendors etc...



上一篇:Oracle RAC数据库集群实例宕机崩溃故障的5种原因分析
下一篇:oracle 11g dataguard 配置管理
189070296,150201289

专业提供Oracle数据库服务、主机、存储、备份、中间件等相关技术支持服务,QQ号:176140749
关注ITPUX技术网微信公众号itpux_com  ,了解本站最新技术资料的分享.

欢迎加QQ群,提供超多高质量Oracle/Unix/Linux技术文档与视频教程的下载。

Oracle/MySQL/Linux群4-5:189070296  150201289  
Oracle/MySQL/Linux群6-8:244609803   522261684   522651731
备注:请勿重复加群,另请注明 from itpux

加群分享视频教程部分如下:

1、公开课视频:Oracle/MySQL数据库工程师职业发展前景讲解(免费)
http://edu.51cto.com/course/7015.html

2、51CTO学院Oracle数据库高级工程师培训(高薪就业.课程介绍)
http://edu.51cto.com/px/train/131?xiaotu

3、Oracle DBA数据库高级工程师培训视频课程1.1(系列78套+七大阶段+上千案例)
套餐视频地址: http://edu.51cto.com/topic/1121.html

4、MySQL数据库(终身门徒)套餐:http://edu.51cto.com/sd/1e1a6

回复

使用道具 举报

内容发布:风哥| 发布时间:2014-1-21 23:07:11
也就是说Oracle不支持使用交叉线作为ClusterWare的interconnects。
这里的Not Support不是说交叉线不能用,而是说Oracle不建议这样做,同时不承担这样做而产生的一系列问题。

实际上,交换机的引入是为了更高的扩展性和稳定性,这是合理的投入,在搭建RAC环境时值得投入。
189070296,150201289

专业提供Oracle数据库服务、主机、存储、备份、中间件等相关技术支持服务,QQ号:176140749
关注ITPUX技术网微信公众号itpux_com  ,了解本站最新技术资料的分享.

欢迎加QQ群,提供超多高质量Oracle/Unix/Linux技术文档与视频教程的下载。

Oracle/MySQL/Linux群4-5:189070296  150201289  
Oracle/MySQL/Linux群6-8:244609803   522261684   522651731
备注:请勿重复加群,另请注明 from itpux

加群分享视频教程部分如下:

1、公开课视频:Oracle/MySQL数据库工程师职业发展前景讲解(免费)
http://edu.51cto.com/course/7015.html

2、51CTO学院Oracle数据库高级工程师培训(高薪就业.课程介绍)
http://edu.51cto.com/px/train/131?xiaotu

3、Oracle DBA数据库高级工程师培训视频课程1.1(系列78套+七大阶段+上千案例)
套餐视频地址: http://edu.51cto.com/topic/1121.html

4、MySQL数据库(终身门徒)套餐:http://edu.51cto.com/sd/1e1a6

回复 支持 反对

使用道具 举报

内容发布:facegood12| 发布时间:2018-2-4 14:38:30
谢谢 不错不错!!!学习了!
回复 支持 反对

使用道具 举报

1框架
您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

快速回复 返回顶部 返回列表