# Cross geo-location Database Region Placement Policy

__*Table and Placement Policy*__

+ Specify table to deploy to different geo-location or host
+ Enable cross geolocation application deployment
+ Ensure data local replica available for local stale read

![`smart`](./student-guide/diagram/PlacementPolicy_en_001_20220504.png)

```
tidb> SHOW PLACEMENT LABELS;
+--------+-------------------------+
| Key    | Values                  |
+--------+-------------------------+
| disk   | ["hdd", "ssd"]          |
| engine | ["tiflash"]             |
| ~!@region@!~ | ["seattle", "shanghai"] |
+--------+-------------------------+
3 rows in set (0.00 sec)
```

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Using the Placement Rules feature, users can specify tables and partitions to be deployed to different regions and host (TiKV configuration is required). Applicable scenario include:
- Low cost optimization data high availability strategy
- Ensure local replica of data is available for local stale read
- Compliance with local data requirements, etc.

The underlying implementation of Placement Rules relies on the placement rules feature provided by PD.