add doc for new-collation-enable in br #8809
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/cc @3pointer @IANTHEREAL |
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Signed-off-by: joccau <zak.zhao@pingcap.com>
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| 从 TiDB v6.0 版本开始，`new_collations_enabled_on_first_bootstrap` 配置的默认值由 `false` 改为 `true`，当上下游集群的此项配置相同时，才可以将上游集群的备份数据安全地恢复到下游集群中。 | ||
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| 从 br v6.0 开始，br 会备份上游集群的 `new_collations_enabled_on_first_bootstrap` 配置项，同时在恢复时会检查此配置项是否与下游集群相同。如果用户需要将旧版本的备份数据恢复到 TiDB v6.0 中，用户需要自行检查上下游集群中的此配置项是否相同，若相同，则在恢复命令中添加 `--check-requirements=false` 可跳过此项配置检查。 |
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如果上下游的 new_collations_enabled_on_first_bootstrap 配置项不相同会怎样呢？会有什么报错呢？
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In response to a cherrypick label: new pull request created: #8815. |
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Signed-off-by: joccau zak.zhao@pingcap.com
First-time contributors' checklist
What is changed, added or deleted? (Required)
Add comments for 6.0 br compatibility because of the default changing of the config
new_collations_enabled_on_first_bootstrapfromfalsetotrue.Which TiDB version(s) do your changes apply to? (Required)
6.0
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