Issues with TiDB Upgrade

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Note:
This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: tidb升级问题

| username: mono

[TiDB Usage Environment] Production Environment
[TiDB Version] 6.5.5
[Question]:
Planning to upgrade from 6.5.5 to 6.5.7. Currently, there are tasks running in the DM cluster to synchronize data from MySQL to the TiDB cluster. Will the data synchronization be affected if upgrading without downtime? If there is an impact, is the best practice to pause the tasks first, then resume synchronization after the upgrade is complete?

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| username: 路在何chu | Original post link

Let’s pause the task for now, note down the TSO, and resume the task after the upgrade is complete. We’ve done it this way before.

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| username: 有猫万事足 | Original post link

It is best to stop the DM task to be more standardized. As for the binlog position, you don’t need to worry, it is all recorded in the dm_meta table.

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| username: dba远航 | Original post link

Yes, stop first, then upgrade, then check to confirm there are no issues, and finally start.

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| username: 哈喽沃德 | Original post link

Correct!