Details
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Improvement
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Resolution: Unresolved
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Minor
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None
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None
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None
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3
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7195
Description
For Imperative Recovery and future Sequoia (ZFS) configurations, it is desirable to configure the MGS to be running on the backup MDS node. The use of IR will increase the load on the MGS server, and by having the MGS on a separate node it will allow IR to speed up MDS recovery time. Having a separate MGS device also avoids problems in the future if there are multiple MDTs on a single node, since it is otherwise complex to stop an MDT without also stopping the MGS on the node, and impossible to run e2fsck on the shared device.
The manual should be updated to discourage the use of shared MGS devices, and explain the reasoning.