Administering a portal farm | HCL Digital Experience
Because a farm is a series of independent server instances and not a cluster, specific procedures need to be followed to deploy updates to the farm that are different than when administering a cluster. Updates include any changes to the system, such as, but not limited to, using or deploying portlets, adding or changing portal pages, changing file system resources, and changing IBM WebSphere Application Server configurations. The procedures differ depending on the type of farm: unique installations or shared installations.