AFM DR limitations

AFM DR limitations include:

• If you change an AFM DR Secondary export from Kernel NFS or CNFS to the new IBM Spectrum Scale CES in 4.1.1 or later, AFM does not recognize the secondary. The best way to manage this situation is to run the mmafmctl changeSecondary command. See the IBM Storage Scale documentation for more details.
• DR administration by using the mmafmctl command is not supported when run from the AIX® OS.
• AFM ADR (primary/secondary filesets) is not supported on an FPO enabled system.
• AFM features such as revalidation, eviction, prefetch, show home snapshots, partial file caching, expire and unexpire, mmafmctl resync and failover, and IW failback are not applicable for AFM DR filesets.
• Administrative operations such as fileset conversion to primary, failover, and failback can be run at the same time on multiple filesets. However, it is not recommended because commands might fail with a "busy" error. The commands might fail in cases where the system runs out of the resources that are needed to perform multiple operations at the same time. If this error occurs, rerun the failed command after the conflicting command completes.