Abstract
In many database deployments, upgrades and downgrades are painpoints, as they require an outage. For this reason, the ability to perform online upgrades and downgrades is one of the important features of MySQL NDB Cluster. Online upgrades and downgrades are supported both for patch release changes (for example 7.5.4 to 7.5.5) as well as for major version changes (for example 7.4.13 to 7.5.4). From a technical perspective, there is little difference between an upgrade and a downgrade, so for the most part these can be treated the same.
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© 2017 Jesper Wisborg Krogh and Mikiya Okuno
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Krogh, J.W., Okuno, M. (2017). Upgrades and Downgrades. In: Pro MySQL NDB Cluster. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-2982-8_11
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DOI: https://doi.org/10.1007/978-1-4842-2982-8_11
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Publisher Name: Apress, Berkeley, CA
Print ISBN: 978-1-4842-2981-1
Online ISBN: 978-1-4842-2982-8
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