Implementing a Cherwell Server Farm

Several implementation steps are required on your network and in CSM.

Some key points:

Ensure the CSM configuration is the same across servers.
A server farm can only be used when the Cherwell Application Server is hosted in IIS. HTTPS and REST are required for the Application Server.
Performance can be slightly impacted when a server farm is enabled because it adds overhead to the individual servers participating in the farm.

For additional requirements, see Server Farm Resource Recommendations.

Single-server Setup Steps for Testing

Before you implement a server farm, first set up a single-server farm for testing and sizing purposes. The single-server configuration ensures that Redis is configured correctly and measures how much memory the Redis Servers need. Once you confirm that the single-server farm is configured correctly, you can add additional servers.

To set up a single-server farm:

Prepare a supported version of Redis Server or Redis Labs Enterprise Cluster (RLEC). See the System Requirements and the Redis documentation.
Install the Cherwell Application Server and CSM Web Server on a single machine.
In the Cherwell Server Manager, enable server farm features and connect to Redis. For more information, see Configure Server Farms in Cherwell Server Manager.
Do not set up a load balancer. At this point you have a single server that behaves as if it is part of a farm. Open the CSM Portal and Browser Client to see the data being stored in Redis.

Production Configuration Steps

Implementation Task	Task Location
1. Verify that your organization has a load balancer.	Your network.
2. Prepare a supported version of Redis Server or Redis Labs Enterprise Cluster (RLEC). See the System Requirements and the Redis documentation.	Your network.
3. Configure a Cherwell server farm for one CSM server in the farm. See Configure Server Farms in Cherwell Server Manager.	Cherwell Server Manager on a CSM server.
4. Configure server farms in Internet Information Systems (IIS). See Configuring Server Farms in IIS.	IIS for all CSM servers in a Cherwell server farm
5. Configure HTTP headers. See Configuring HTTP Headers for Load Balancers, Web Application Firewalls, and Reverse Proxies.	Load balancers, firewalls, and reverse proxies.