Example Architectural Decision – HA Admission Control Policy with Software licensing constraints via @josh_odgers
High Availability Admission Control Setting & Policy with a Software Licensing Constraint
The customer has a requirement to virtualize “Application X” which is currently running on physical servers. The customer is licensed for a maximum of 32 cores and the software vendor has strict licensing restrictions which do not recognize the use of DRS rules to restrict virtual machines to a sub-set of hosts within a cluster.
The application is Tier 1, and requires maximum availability. A capacity planner assessment has been conducted and found 32 cores and 256Gb RAM is sufficient to run all servers.
The servers requirements vary greatly from 1vCPU/2GB RAM to 8vCPU/64GB Ram with the bulk of the VMs 2vCPU or less with varying RAM sizes.
What is the most suitable hardware configuration and HA admission control policy / setting that complies with the licensing restrictions while ensuring N+1 redundancy and minimizing the change…
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