[WIP]: add v8.5.0 release notes #19033

qiancai · 2024-11-11T02:40:23Z

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ti-chi-bot · 2024-11-11T03:12:53Z

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YangKeao

LGTM

ti-chi-bot · 2024-11-12T06:25:48Z

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releases/release-8.5.0.md

Frank945946 · 2024-11-15T09:57:18Z

releases/release-8.5.0.md

+
+### 可扩展性
+
+* Schema 缓存内存上限功能成为正式功能（GA），减少了大规模数据场景的内存占用 [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd <!--1976-->


Suggested change

* Schema 缓存内存上限功能成为正式功能（GA），减少了大规模数据场景的内存占用 [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd 

* Schema 缓存内存上限功能成为正式功能（GA），可以在集群拥有数十万甚至百万个数据库或表的场景中减少内存的使用。 [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd

releases/release-8.5.0.md

Add GCP KMS content

Co-authored-by: D3Hunter <[email protected]>

releases/release-8.5.0.md

…_table

releases/release-8.5.0.md

…ommit pingcap/docs-cn@a7dc0db

lance6716

DDL/lightning part lgtm

ti-chi-bot · 2024-12-03T04:29:02Z

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releases/release-8.5.0.md

ti-chi-bot · 2024-12-03T05:40:59Z

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BornChanger · 2024-12-03T06:28:38Z

releases/release-8.5.0.md

+  <tr>
+    <td><a href="https://docs.pingcap.com/zh/tidb/v8.5/backup-and-restore-storages#鉴权">支持对开启了 IMDSv2 服务的 TiKV 实例做备份</a>（从 v8.4.0 开始引入）</td>
+    <td><a href="https://aws.amazon.com/cn/blogs/security/get-the-full-benefits-of-imdsv2-and-disable-imdsv1-across-your-aws-infrastructure/">目前 AWS EC2 的默认元数据服务是 IMDSv2</a>。TiDB 支持从开启了 IMDSv2 的 TiKV 实例中备份数据，协助你更好地在公有云服务中运行 TiDB 集群。</td>
+  </tr>


Suggested change

<tr>

<td><a href="https://docs.pingcap.com/zh/tidb/v8.5/backup-and-restore-storages#鉴权">支持对开启了 IMDSv2 服务的 TiKV 实例做备份</a>（从 v8.4.0 开始引入）</td>

<td><a href="https://aws.amazon.com/cn/blogs/security/get-the-full-benefits-of-imdsv2-and-disable-imdsv1-across-your-aws-infrastructure/">目前 AWS EC2 的默认元数据服务是 IMDSv2</a>。TiDB 支持从开启了 IMDSv2 的 TiKV 实例中备份数据，协助你更好地在公有云服务中运行 TiDB 集群。</td>

</tr>

<tr>

<td>启用 AWS rust sdk（从 v8.5.0 开始引入）</td>

<td>TiDB 用 AWS rust sdk 替换掉原有的 rusoto 库，从 TiKV 访问 AWS S3 等外部存储，以更好地兼容 IMDSv2 以及 Pod Identity 等新特性。</td>

</tr>[

Frank945946 · 2024-12-03T06:06:13Z

releases/release-8.5.0.md

+  </tr>
+  <tr>
+    <td><a href="https://docs.pingcap.com/zh/tidb/v8.5/partitioned-table#全局索引">分区表全局索引</a>（从 v8.4.0 开始成为正式功能）</td>
+    <td>全局索引可以有效提高检索非分区列的效率，并且消除了唯一键必须包含分区键的限制。该功能扩展了 TiDB 分区表的使用场景，避免了数据迁移过程中的一些应用修改工作。</td>


Suggested change

<td>全局索引可以有效提高检索非分区列的效率，并且消除了唯一键必须包含分区键的限制。该功能扩展了 TiDB 分区表的使用场景，避免了数据迁移过程中的一些应用修改工作。</td>

<td>全局索引可以有效提高检索非分区列的效率，并且消除了唯一键必须包含分区键的限制。该功能扩展了 TiDB 分区表的使用场景，提升了分区表的性能，降低了分区表在一些查询场景的资源消耗。</td>

避免应用修改可能不是特别合适，因为 TiDB 大部分场景是从 MySQL 迁移过来，但是 MySQL 没有 Global index。而 oracle 有 Global index。建议改成其他的优势。

Frank945946 · 2024-12-03T06:19:50Z

releases/release-8.5.0.md

+
+### 可扩展性
+
+* Schema 缓存可用的内存上限成为正式功能 (GA)，减少了大规模数据场景的内存占用 [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd <!--1976-->


Suggested change

* Schema 缓存可用的内存上限成为正式功能 (GA)，减少了大规模数据场景的内存占用 [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd 

* Schema 缓存可用的内存上限成为正式功能 (GA)，当表的数量达到几十万甚至上百万时，可显示减少 Schema mate 的内存占用 [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd

大规模数据场景不是特别准确，因为用户有可能表数量非常多，但是每个表的数据量很少。这里主要针对Schema 或表的数量特别多的场景。

ti-chi-bot · 2024-12-03T06:32:00Z

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yibin87

LGTM

ti-chi-bot · 2024-12-03T06:34:49Z

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BornChanger · 2024-12-03T06:36:06Z

releases/release-8.5.0.md

+| 配置文件或组件 | 配置项 | 修改类型 | 描述 |
+| -------- | -------- | -------- | -------- |
+| TiDB | [`deprecate-integer-display-length`](/tidb-configuration-file.md#deprecate-integer-display-length) | 修改 | 从 v8.5.0 开始，整数显示宽度功能已废弃，该配置项的默认值从 `false` 修改为 `true`。 |
+| TiKV | [`raft-client-queue-size`](/tikv-configuration-file.md#raft-client-queue-size) | 修改 | 默认值从 `8192` 修改为 `16384`。|


YangKeao

LGTM

ti-chi-bot · 2024-12-03T06:47:52Z

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BornChanger · 2024-12-03T06:59:56Z

releases/release-8.5.0.md

+        - 优化加密密钥 `--crypter.key` 的错误提示信息 [#56388](https://github.com/pingcap/tidb/issues/56388) @[Tristan1900](https://github.com/Tristan1900)
+        - 增加 BR 创建数据库时的并发度，以提升数据恢复性能 [#56866](https://github.com/pingcap/tidb/issues/56866) @[Leavrth](https://github.com/Leavrth)
+        - 在进行全量备份时，默认关闭用于 BR 内部验证逻辑的 checksum (`—-checksum=false`) 以提升备份性能，验证备份数据完整性的 checksum 仍然保持开启 [#56373](https://github.com/pingcap/tidb/issues/56373) @[Tristan1900](https://github.com/Tristan1900)
+        - 新增对每个存储节点的连接超时进行独立追踪和重置的机制，增强了对慢节点的处理能力，从而避免备份卡住的问题 [#57666](https://github.com/pingcap/tidb/issues/57666) @[3pointer](https://github.com/3pointer)


Suggested change

- 新增对每个存储节点的连接超时进行独立追踪和重置的机制，增强了对慢节点的处理能力，从而避免备份卡住的问题 [#57666](https://github.com/pingcap/tidb/issues/57666) @[3pointer](https://github.com/3pointer)

- 新增对每个存储节点的连接超时进行独立追踪和重置的机制，增强了对慢节点的处理能力，从而避免备份卡住的问题 [#57666](https://github.com/pingcap/tidb/issues/57666) @[3pointer](https://github.com/3pointer)

- 提升 `k8s.io/api` 库的版本来修复可能的安全漏洞 [#57790](https://github.com/pingcap/tidb/issues/57790) @[BornChanger](https://github.com/BornChanger)

- 等待 TiDB info schema 完全加载后，pitr 恢复才能执行内部 dml [#57743](https://github.com/pingcap/tidb/issues/57743) @[Tristan1900](https://github.com/Tristan1900)

releases/release-8.5.0.md

Co-authored-by: lhy1024 <[email protected]> Co-authored-by: Wenqi Mou <[email protected]>

JaySon-Huang

LGTM

ti-chi-bot · 2024-12-03T09:07:53Z

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[WIP]: add v8.5.0 release notes #19033

[WIP]: add v8.5.0 release notes #19033

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		### 可扩展性

		* Schema 缓存内存上限功能成为正式功能（GA），减少了大规模数据场景的内存占用 [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd <!--1976-->

	<td>全局索引可以有效提高检索非分区列的效率，并且消除了唯一键必须包含分区键的限制。该功能扩展了 TiDB 分区表的使用场景，避免了数据迁移过程中的一些应用修改工作。</td>
	<td>全局索引可以有效提高检索非分区列的效率，并且消除了唯一键必须包含分区键的限制。该功能扩展了 TiDB 分区表的使用场景，提升了分区表的性能，降低了分区表在一些查询场景的资源消耗。</td>


		### 可扩展性

		* Schema 缓存可用的内存上限成为正式功能 (GA)，减少了大规模数据场景的内存占用 [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd <!--1976-->

	\| TiKV \| [`raft-client-queue-size`](/tikv-configuration-file.md#raft-client-queue-size) \| 修改 \| 默认值从 `8192` 修改为 `16384`。\|
	\| TiKV \| [`raft-client-queue-size`](/tikv-configuration-file.md#raft-client-queue-size) \| 修改 \| 默认值从 `8192` 修改为 `16384`。\|
	\| BR \| `--checksum` \| 修改 \| 从 v8.5.0 开始，快照备份该配置项的默认值从 `true` 修改为 `false`。 \|

[WIP]: add v8.5.0 release notes #19033

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[WIP]: add v8.5.0 release notes #19033

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qiancai commented Nov 11, 2024

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