# Cross Geo-location Database Region 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

```
tidb> SHOW PLACEMENT LABELS;
+--------+-------------------------+
| Key    | Values                  |
+--------+-------------------------+
| disk   | ["hdd", "ssd"]          |
| engine | ["tiflash"]             |
| region | ["seattle", "tokyo"] |
+--------+-------------------------+
3 rows in set (0.00 sec)
```
![`smart`](TiDBClusterArchitectureGeoDistributed_aa_001_20240129.png)

------------------------------------------------------------
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.