we are using amazon cloud in the following structure.
load balancer->x number of moodle servers -> 1 amazon rds(db) -> 2 linux servers for storage.
all goes well until i remove one of the servers. in that case the user is logged out and forced to login again.
We tried to store the session on memcach server so there will be one session for each user regardless to what server he logged in.
but still it doesnt work.
Is there a way to make it possible for users to glide from one server to another without loosing the login???
By default sessions are either stored by Disk/Database. Since you have one database why not test out that scenario. If it works at least you have a starting point. Then you can try optimize.
I'm guessing since this is not operational nd you are not using this in production. Why are you using AWS and just out of curiousity.
How many users?
How many concurrent users?
How much storage for moodledata?
What type of EC2 instances / RDS instance are you using?