What is PodAffinity and PodAntiAffinity?

While NodeAffinity attracts pods to specific hardware, `PodAffinity` attracts pods to *other pods*. For example, you can force your Frontend pod to always be scheduled on the exact same physical server as your Redis cache pod to minimize network latency. Conversely, `PodAntiAffinity` forces pods apart (e.g., ensuring no two replicas of your database ever land on the same physical server, preventing a single point of failure).

Can a Node have multiple Taints?

Yes. A single node can have multiple taints. For a pod to be scheduled on that node, the pod must possess a matching `Toleration` for *every single* taint on the node. If it is missing even one toleration, the scheduler will reject it.

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Advanced Scheduling

Master Kubernetes advanced placement mechanics. Understand how to use Node Selectors to target specific hardware, Node Affinity for complex fallback logic, and how Taints and Tolerations create dedicated server isolation.

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