MySQL 8.4 Release Notes
3.2 升级路径
Notes
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在升级前，请确保您理解MySQL 版本发布模型，包括长期支持（LTS）和创新版本。
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我们建议使用 MySQL Shell 的升级检查工具来检查升级兼容性。
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复制拓扑升级可以按照第19.5.3节，“升级或降级复制拓扑”中的rolling upgrade方案进行，每个单个服务器升级使用支持的单服务器方法之一。
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月度快速更新（MRUs）和热fix也被视为在本文档中的发布。
表3.1 MySQL Server 升级路径
| Upgrade Path | Path Examples | Supported Upgrade Methods |
|---|---|---|
| Within an LTS or Bugfix series | 8.0.37 to 8.0.41 or 8.4.0 to 8.4.4 | in-place upgrade、logical dump and load、replication和MySQL Clone |
| From an LTS or Bugfix series to the next LTS series | 8.0.37 to 8.4.x LTS | in-place upgrade、logical dump and load和replication |
| From an LTS or Bugfix release to an Innovation release before the next LTS series | 8.0.34 to 8.3.0 or 8.4.0 to 9.0.0 | in-place upgrade、logical dump and load和replication |
| From an Innovation series to the next LTS series | 8.3.0 to 8.4 LTS | in-place upgrade、logical dump and load和replication |
| From an Innovation series to an Innovation release after the next LTS series | 不允许，需要两个步骤：8.3.0 to 8.4 LTS，和 8.4 LTS to 9.x Innovation | in-place upgrade、logical dump and load和replication |
| From within an Innovation series | 8.1.0 to 8.3.0 | 非侵入式升级, 逻辑备份和恢复, 和 复制 |
| From MySQL 5.7 to an LTS or Innovation release | MySQL 5.7 到 8.4 | 一个bugfix或LTS系列不能被跳过，所以在这个示例中，首先升级 MySQL 5.7 到 MySQL 8.0, 然后升级 MySQL 8.0 到 MySQL 8.4。 |