Pete Stokes wrote, On 2/3/2004 8:09 AM: > [EMAIL PROTECTED] wrote: >> For redundancy in apache the following options are open to you : >> 1) Use a http sprayer in front of the apache webservers >> 2) Use a load balancing software such as Stonebeat Webcluster >> 3) Manual failover. This is where you have two instances of apache >> configured and running using the same ip, but only have one of the >> "up". When your primary node fails down its interface and up the >> secondary. >
For point 3, I'd assume that all users would then lose their sessions? I'd be after sticky sessions, so I guess I'd need memory-memory replication between the two apache's, is this possible?
If you're clustering multiple Tomcats instances with replicated sessions on different machines behind multiple Apache instances on different machines, if one of the Apache instances dies you won't lose any sessions as your Tomcat instances have not been affected.
With TC 5, you don't even need to use sticky sessions if you're using session replication, but I would recommend it anyway.
-Dave
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