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raft-engine: release spill-dir feature. #18690

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raft-engine: release spill-dir feature. #18690

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raft-engine: release `spill-dir` feature.
LykxSassinator Sep 20, 2024
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Polish annotations.
LykxSassinator Sep 20, 2024
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LykxSassinator Sep 20, 2024
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Update tikv-configuration-file.md
hfxsd Sep 20, 2024
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LykxSassinator Sep 20, 2024
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14 changes: 14 additions & 0 deletions tikv-configuration-file.md
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Expand Up @@ -1936,6 +1936,20 @@ Raft Engine 相关的配置项。
+ 如果你的机器上有多个磁盘，建议将 Raft Engine 的数据存储在单独的磁盘上，以提高 TiKV 性能。
+ 默认值：`""`

### `spill-dir` <span class="version-mark">从 v8.4.0 版本开始引入</span>

+ 存储 Raft 日志文件的辅助目录，当 `dir` 目录所在盘数据写满后，新的 Raft 日志将存储在该目录下。如果该目录配置后不存在，则在启动 TiKV 时创建该目录。
+ 如果未设置此配置，则表示不启用辅助目录。

> **注意：**
>
> - 该配置仅在 Raft Engine 的 `dir` 和 `spill-dir` 分别指定为**不同盘符**时才有效。
> - 在配置该功能后，若想要关闭该功能，你需要在重启 TiKV **之前**执行如下操作，否则将**无法启动** TiKV：
> 1. 关闭 TiKV。
> 2. 将 `spill-dir` 目录下的所有 Raft Log 复制到 [`dir`](/tikv-configuration-file.md#dir) 目录下。
> 3. 从 TiKV 配置文件中删除该配置。
> 4. 重启 TiKV。

### `batch-compression-threshold`

+ 指定日志批处理的阈值大小。大于此配置的日志批次将被压缩。如果将此配置项设置为 `0`，则禁用压缩。
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