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6.2.2.6. Preferred IBM Z system requirements

Hardware requirements
  • 3 LPARs with 6 IFLs each that support SMT2
  • 1 or 2 OSA or RoCE network adapters, or both
  • Hipersockets, which are attached to a node either directly as a device or by bridging with one z/VM VSWITCH to be transparent to the z/VM guest. To directly connect Hipersockets to a node, you must set up a gateway to the external network via a RHEL 8 guest to bridge to the Hipersockets network.
Operating system requirements
  • 2 or 3 instances of z/VM 7.1 for high availability

On your z/VM instances, set up:

  • 3 guest virtual machines for OpenShift Container Platform control plane machines, one per z/VM instance
  • At least 6 guest virtual machines for OpenShift Container Platform compute machines, distributed across the z/VM instances
  • 1 guest virtual machine for the temporary OpenShift Container Platform bootstrap machine
Disk storage for the z/VM guest virtual machines
  • FICON attached disk storage (DASDs). These can be z/VM minidisks, fullpack minidisks, or dedicated DASDs, all of which must be formatted as CDL, which is the default. To reach the minimum required DASD size for Red Hat Enterprise Linux CoreOS (RHCOS) installations, you need extended address volumes (EAV). If available, use HyperPAV and High Performance FICON (zHPF) to ensure optimal performance.
  • FCP attached disk storage
Storage / Main Memory
  • 16 GB for OpenShift Container Platform control plane machines
  • 8 GB for OpenShift Container Platform compute machines
  • 16 GB for the temporary OpenShift Container Platform bootstrap machine