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raft-engine: add the spill-dir config parameter #18981

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Oct 16, 2024
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raft-engine: add the spill-dir config parameter #18981

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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 24, 2024
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lilin90 Oct 8, 2024
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lilin90 Oct 8, 2024
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14 changes: 14 additions & 0 deletions tikv-configuration-file.md
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Expand Up @@ -1933,6 +1933,20 @@ Configuration items related to Raft Engine.
+ If there are multiple disks on your machine, it is recommended to store the data of Raft Engine on a different disk to improve TiKV performance.
+ Default value: `""`

### `spill-dir` <span class="version-mark">New in v8.4.0</span>

+ The auxiliary directory for storing raft log files. When the disk where the `dir` specified is full, new raft logs will be stored under this directory. If this directory does not exist after configuration, it will be created when TiKV is started.
+ If this configuration is not set, it means that the directory does not exist.

> **Note:**
>
> - This configuration is only valid when the dir and spill-dir of the Raft Engine are specified as different disk drives.
> - After enabling this feature, if you want to disable it, you need to perform the following operations before restarting TiKV:
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> - Shut down TiKV;
> - Copy all raft Logs in this directory to the directory;
> - Remove this configuration from the TiKV configuration file;
> - Restart TiKV;
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### `batch-compression-threshold`

+ Specifies the threshold size of a log batch. A log batch larger than this configuration is compressed. If you set this configuration item to `0`, compression is disabled.
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