In limited circumstances for example when copying LPARs between specific regions or importing an LPAR into Kyndryl Cloud Uplift, the LPARs may transition between hosts that are single VIOS or dual VIOS. Additionally, LPARs on dual VIOS hosts should be properly configured for dual VIOS for performance reasons as well all resiliancy during VIOS changes or unexpected issues.
Regions and hosts types that support dual VIOS can be found on this page.
IBM i based LPARs
- Moving from single to dual VIOS: No changes are required
- Moving from dual to single VIOS: No changes are required
- May see benign error messages which can be can be cleared here
- Configuring for dual VIOS failover: No change required
AIX based LPARs
- Moving from single to dual VIOS: When an AIX LPAR moves from single VIOS to dual VIOS it will function correctly, however configuring the disks properly can increase performance significantly
- Moving from dual VIOS to single VIOS: No changes are required, but you may see harmless error messages. These errors can be cleared
- Dual VIOS failover: AIX LPARs running on dual VIOS should set the failover algorithm properly to increase resiliency in unexpected situations
Ubuntu for Power based LPARs
Red Hat Enterprise Linux (RHEL) based LPARs
FalconStor on Power LPARs
- Moving from single to dual VIOS (CentOS)
- Moving from dual to single VIOS (CentOS)
- Moving between single and dual VIOS (Circle OS)
If you have any further questions or comments around single or dual VIOS topics, please contact Kyndryl Cloud Uplift Support by sending an email to support@skytap.com
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