text: The z/OS Parallel Sysplex technology enables the Content Manager OnDemand servers to 
  share configuration files, database, JES, HFS, and archive. For performance reasons, all HFS 
  read/write directories that are used for temporary storage of data are configured as unique to 
  each Content Manager OnDemand server. 
  
  From a client perspective, the “cluster” is a single IP address. Incoming client requests are 
  received by the sysplex distributor/Workload Manager (WLM). WLM monitors the various 
  systems in the Parallel Sysplex and selects the appropriate Content Manager OnDemand 
  server to forward the request to based on the current system workload and availability, so that 
  the system that is more available (less busy) receives the request. 
  
  **12.3.3 High availability: IBM i**
  
  IBM PowerHA® SystemMirror® for i is the integrated IBM storage-based clustering solution 
  for high availability and disaster recovery. The data and applications are deployed into storage 
  pools, which are called*independent auxiliary storage pools*(IASPs). IASPs can be deployed 
  by using either internal or external storage. At any time, the nodes in the cluster can switch 
  roles and become either a primary or backup node. PowerHA SystemMirror can be used for 
  on-demand role swap operations. 