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Eon mode managing fault groups

  • March 4, 2019
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Bryan_H
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Got two customer questions on Eon mode below that I'd like best practice advice:
1. In EON mode, can I stop a subset of nodes in the cluster, which all belong to the same FG?
2. How can I ensure one FG of nodes only works with other nodes in the same FG? (I have seen nodes leverage other nodes in different FG, even after I run the REBALANCE_SHARDS

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    Bryan_H
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    • Bryan_H
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    • March 4, 2019

    Some answers to part 1 in case anyone else needs it:
    So what method should be used to shut down a subcluster (fault group) – admintools?
     Yes
    Is creating a subcluster as simple as adding nodes and defining the new group?
     Yes
    And how about the issue of query routing?
     Depending on initiator picked query will be serviced by subcuster that has initiator node.

    Should an execution plan use only the current fault group
     Yes, it will use nodes within current fault group of initiator node.

    , or all available nodes with the necessary shard subscription?
     Each subcluster should have necessary nodes with necessary shard subscription to answer query.

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