Modes and concepts

AFM DR uses the same underlying infrastructure as AFM. AFM DR is characterized by two modes: the fileset in the primary cluster uses the primary mode and the fileset in the secondary cluster uses the secondary mode.

AFM DR is supported over both NFS v3 and GPFS protocol. The primary fileset is owned by the primary gateway, which communicates with the NFS server on the secondary side. The primary-secondary relationship is strictly one-to-one.

AFM revalidation does not apply to primary filesets. All files are always cached because primary is the only writer and secondary is in the read-only mode.

You can convert the SW/IW relationship to a DR relationship. However, you cannot convert a DR relationship to an SW/IW relationship.