Deciding on the optimal size of Kubernetes clusters is crucial for long-term organizational impact. A single large cluster provides benefits like better resource utilization, lower operational overhead, simplified networking and governance, and cost efficiency. However, it has downsides such as a larger blast radius, multi-tenancy challenges, scalability limits, and maintenance risks. vCluster, an open-source Kubernetes distribution, helps mitigate these issues by allowing the creation of virtual clusters within a single host cluster. This approach combines the advantages of a large cluster while addressing its disadvantages, proposing one cluster for production and another for all other environments.
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