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Hello and welcome to this lecture.



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Now that we have learned about teens and toleration and note affinity let us tie together the two concepts



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through a fun exercise.



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We have three notes and three parts each in three colors blue red and green.



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The ultimate aim is to place the blue pod in the Blue Note the red part in the red note and likewise



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for green.



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We are sharing the same covenant as cluster with other teams so there are other parts in the cluster



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as well as other nodes.



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We do not want any other pod to be placed on our note.



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Neither do we want our pods to be placed on their nodes.



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Let us first try to solve this problem using teens and toleration as we apply a taint to the nodes marking



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them with their colors blue red and green.



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And we then set a toleration on the part to tolerate the respective colors when the parts are now created.



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The nodes ensure they only accept the part with the right toleration.



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So the green part ends up on the green node and the blue part ends up on the Blue Note.



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However tense and toleration does not guarantee that the parts will only prefer these notes.



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So the red note ends up on one of the other nodes that do not have a taint or toleration set.



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This is not desired let us try to solve the same problem with node affinity with node affinity.



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We first labeled the nodes with their respective colors blue red and green.



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We then said node selectors on the part to tie the part to the nodes.



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As such the parts end up on the right.



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Note however that does not guarantee that other parts are not placed on these notes.



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In this case there is a chance that one of the other parts may end up on our nodes.



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This is not something we desired as such a combination of teens and toleration and no definitive rules



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can be used together to completely dedicate nodes for specific part we first use taints and toleration



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to prevent other parts from being placed on our nodes.



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And then we use node affinity to prevent our parts from being placed on their nodes.



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Well that's it for this lecture.