# `3-DC` Deployment Solution: Optimizations

![`smart`](3DCDeploymentOptimizations_aa_001_20221025.png)

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If there is no need for all data centers to provide external services at the same time, all business traffic can be distributed to one data center, and both the `region leader` and `PD leader` can be migrated to the same data center through a scheduling strategy (we also made this optimization in the tests described above). 

This way, whether obtaining `TSO` from `PD` or reading `region` data, is unaffected by the `inter data center` network. When the data center fails, the `PD leader` and `region leader` are automatically selected from other data centers, then you can route business traffics to other surviving data centers.