IBM Hyperconverged System concepts

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The AIX operating system uses the Nutanix Kernal-based Virtual Machine (KVM) based (non-PowerVM) Acropolis Hypervisor (AHV) on IBM Hyperconverged Systems powered by Nutanix.

AIX features that rely on PowerVM are not supported in the Nutanix environment because of the differences between the firmware, the Nutanix KVM-based Acropolis Hypervisor, and PowerVM.

The following AIX features are not supported on Hyperconverged Systems powered by Nutanix:
  • Virtual Memory Page Sizes of 64 KB
  • IBM Hyperconverged Systems use fully virtualized I/O; therefore, workloads that rely on physical I/O are not supported.
  • Remote Direct Memory Access (RDMA) based workloads, including DB2 pureScale and Oracle Real Application Clusters (RAC) with Reliable Datagram Sockets (RDS)
  • Power NX accelerators, Active Memory Expansion (AME), IPSec hardware accelerated encryption, hardware accelerated encryption supporting JFS2 file encryption
  • AIX Live Update
  • AIX Dynamic System Optimizer (DSO)
  • Transactional Memory
    Note: Transactional Memory is used internally by IBM SDK for Java and will not affect the functionality of applications or middleware.
  • Hardware memory protection keys, which are used by AIX on some PowerVM based systems
  • Some AIX First Failure Data Capture (FFDC) features, including mini-dumps and crash error logs, are not supported. Including, crash and reboot log entries and the last error log entry before a crash.
  • Interrupt binding and CPU interrupt masking, which are used in some customized configurations with high affinity between I/O traffic and applications.