What is the best approach to double the capacity of a 3000 core cluster?

Doubling the capacity of a 3000 core cluster requires a strategy that effectively increases the available computational resources. Making a copy using a configuration and instance pool is a sound approach because it allows you to efficiently scale up by creating an identical environment with the same resources as the original. This method ensures that the additional cores are integrated without the complexities of adding hardware or reconfiguring existing nodes.

Creating a copy through a well-established pool allows for horizontal scaling, meaning that you can maintain performance while handling larger workloads. This approach also takes advantage of existing configurations to minimize setup time and operational risk, as the new instance will mirror the established environment.

The other options, while potentially useful in different contexts, do not directly align with the goal of doubling the overall core count. For instance, simply adding more nodes may not guarantee that you achieve an effective doubling of capacity if the new nodes don't provide the same core resources as existing ones. Reassigning workloads to existing nodes could optimize resource usage but wouldn't inherently increase capacity. Increasing the core count per node might enhance the power of individual nodes but doesn't necessarily lead to a balanced doubling of total computational power across the cluster as a whole.