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docs: format optimization for dataDir

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kailixu 2023-01-10 17:15:09 +08:00
parent cae3532e58
commit 90fd949606
1 changed files with 8 additions and 5 deletions
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13
docs/en/14-reference/12-config/index.md
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@ -318,14 +318,15 @@ The charset that takes effect is UTF-8.
:::info
The official version supports multi-tier storage (need to cooperate with [KEEP parameter](https://docs.tdengine.com/taos-sql/database/#create-a-database)). The configuration method is as follows.
The multi-tier storage directory is configured through dataDir, the format is: dataDir [path] <level> <primary>
dataDir: Configuration items in the configuration file (taos.cfg)
The multi-tier storage directory is configured through `dataDir`, the format is: `dataDir [path] <level> <primary>`
```
dataDir: Configuration items in the configuration file (`taos.cfg`)
path: the directory to mount (cannot be omitted)
level: mount level, the value is 0, 1 or 2, if omitted, the default is 0. Up to 3 levels are supported, and each level supports up to 16 mount points, so a maximum of 48 mount points are supported.
primary: whether it is the primary mount point, 0 (no) or 1 (yes), the default is 1. The primary mount point is only allowed at level 0, and only one primary mount point is allowed (level=0, primary=1).
```
Here is a normal configuration (3 storage tiers, each with 3 mount points):
```
Data directory /mnt/data01 0 1
Data directory /mnt/data02 0 0
Data directory /mnt/data03 0 0
@ -335,11 +336,13 @@ Data directory /mnt/data12 1 0
Data directory /mnt/data20 2 0
Data directory /mnt/data21 2 0
Data directory /mnt/data22 2 0
```
The community version does not support multi-tier storage, and the following three configurations are acceptable:
```
Data directory /var/lib/taos
or dataDir /var/lib/taos 0
or dataDir /var/lib/taos 0 1
```
:::