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@@ -82,6 +82,9 @@ cluster health to have a stable master node.
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Any master-eligible node (all nodes by default) may be elected to become the
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master node by the <<modules-discovery-zen,master election process>>.
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+IMPORTANT: Master nodes must still access to the `data/` directory (just like
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+`data` nodes) as this is where the cluster state is persisted between node restarts.
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+
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Indexing and searching your data is CPU-, memory-, and I/O-intensive work
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which can put pressure on a node's resources. To ensure that your master
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node is stable and not under pressure, it is a good idea in a bigger
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Clinton Gormley