Hi Listers, I've been assigned a task of developing a load balanced environment for our remedy infrastructure. It has become a headache now since I am stuck with few things. Here's bit of description of the architecture. We have planned for having two sites A and B, A will be Primary and B a Disaster Recovery Site. On the top we have Users connecting through Citrix to any of the ARS application servers through two F5 1600 Load Balancer. The Load Balancers are in active - passive mode with a switch above them to shift the connection incase any of the LB goes down. Then we have 4 ARS application server all in Active mode in server group architecture. These servers have two Database to connect to. Databases are in Active - Passive mode. Each of these DBs are connected to their own SAN for storage. We will have a dataguard for replication of the database. DSO is not proposed in this architecture. We have a home grown application. ARS version 7.1.0 on Solaris 10 Oracle 10g on RHEL 5 Midtier 7.1.0 on Windows 2003 server Questions that concern us are: 1. Will this architecture be feasible solution for failover and high availability? 2. How will we find out incase any of the server goes down? Is there any need for health check script to run on each of the ARS Server box to see if the server is alive or not? 3. To have a zero downtime at the time of application upgrade, if we take one side completely down then is there an option in Load Balancer to restrict the users to access the admin server so that we can use it to do our workflow updates in the passive database. Then the dataguard will copy the changes from this database to the active. Is this scenario possible? if not then is there any other option where I can achieve zero downtime or minimal downtime for workflow and form updates. 4. Is there some recommendation for setting the stickiness value in the load balancer. 5. Has someone used this kind of scenario with F5 Load balancer and can share how things are configured? Remedy only has a documentation with Cisco LB. 6. Are there any critical things you'd like to list which needs to be taken care of in this environment. Any thoughts are appreciated.....! -- Ankur
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