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Editor to share with you what is the use of vip in oracle 10g RAC 11g RAC, I believe most people do not know much about it, so share this article for your reference. I hope you will learn a lot after reading this article. Let's learn about it together.

Why do we have a Virtual IP (VIP) in Oracle RAC 10g or 11g? The goal is application availability. The purpose of VIP in RAC is to achieve high availability of When a node fails, the VIP associated with it is automatically failed over to some other node. When one of the nodes in the rac system down falls off, the assigned vip will automatically fail over to the healthy node When this occurs, the following things happen. When failover occurs, the following actions occur (1) VIP detects public network failure which generates a FAN (Fast Application Notification,FAN is an event generated by the EVM) event. VIP detects the fan out event FAN event (Fast Application Notification,FAN is an event generated by the EVM) (2) the new node re-arps the world indicating a new MAC address for the IP. Reparse in the new node, indicating a new MAC address of IP (3) connected clients subscribing to FAN immediately receive ORA-3113 error or equivalent. Those not subscribing to FAN will eventually time out. Connected clients will quickly receive ORA3113 errors through customized FAN events, clients that do not open FAN events will eventually time out (4) New connection requests rapidly traverse the tnsnames.ora address list skipping over the dead nodes, instead of having to wait on TCP-IP timeouts new connections quickly request to skip invalid nodes through the address list of the tnsnames.ora file Instead of waiting for TCP-IP timeout Without using VIPs or FAN, clients connected to a node that died will often wait for a TCP timeout period (which can be up to 10 min) before getting an error. If you do not use vip or FAN, the clients connected to the downtime node will often wait for TCP timeout before reporting an error. The above is all the content of the article "what's the use of vip in oracle 10g RAC 11g RAC". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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