IBM i clustering support is not aware of whether data is resilient. Instead, clustering provides interfaces through which other software products that provide data protection and resiliency can integrate with clustering support. Data resiliency is established through a data CRG by the synchronization and replication of data and objects from the primary node to a backup node in the recovery domain.
IBM i supports the following data protection technologies for use with clustering:
Journaling
Switchable independent ASPs
Mirrored independent ASPs and mirrored external storage (SAN-based) functions
Assure MIMIX for PowerHA fully supports all of these technologies through exit programs and provides coordination of cluster activities in hybrid environments which include combinations of data technologies. In addition, Assure MIMIX for PowerHA seamlessly integrates cluster management with high availability solutions from Precisely.