Hi Krist; There are two different options are available 1. Non clustered environment. (With sticky session on) In this type of configuration if any one application server would be down/failed then all sessions are created by this server would be destroyed. And all new coming requests would automatically forward to the enabled application server. Because load balancer checks that which server is enabled?
2. clustered environment. (With sticky session off) This is more difficult concept, but it provides failover concept. Here your all app server are configured in a clustered environment. Where sessions are replicated from one to another. So if any server would be failed then sessions are replicated to another server, in this way any session would not be destroyed.All request can be fulfilled by another app server if one failed. This is just a power of clustering. If you want more configuration related help so please let me know!! Ok bye and tc. Narendra -----Original Message----- From: Krist van Besien [mailto:[EMAIL PROTECTED] Sent: Monday, March 17, 2008 4:15 PM To: users@httpd.apache.org Subject: [EMAIL PROTECTED] Load Balancing I have a short question about mod_proxy_loadbalancer. I haven't used this yet, and am investigating if this module is worth upgrading our servers to 2.2 for. I currently use an apache server to forward requests to a backend application server. For performance reasons we want to add another application server, and apache would balance requests to both. However, when one of the application servers is/goes down apache should stop sending requests to this server. From the documentation it is not entirely clear to me if apache does this. So my question: If I were to create a configuration like this: ProxyPass /webapp/ balancer://appcluster/webapp <Proxy balancer://webapp> BalancerMember http://app1.example.com BalancerMember http://app2.example.com ProxySet lbmethod=byrequests </Proxy> What would happen in this case were app1 dead. Would all requests then go to app2, or would half of all requests just fail? Krist -- [EMAIL PROTECTED] [EMAIL PROTECTED] Bremgarten b. Bern, Switzerland -- A: It reverses the normal flow of conversation. Q: What's wrong with top-posting? A: Top-posting. Q: What's the biggest scourge on plain text email discussions? --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: [EMAIL PROTECTED] " from the digest: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: [EMAIL PROTECTED] " from the digest: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
