# Dedicated Tier
+ Dedicated for production use with the benefits of cross-zone high availability, horizontal scaling, and HTAP
+ Customize the cluster size of TiDB, TiKV, and TiFlash easily according to your business need
+ For each TiKV node and TiFlash node, the data on the node is replicated and distributed in different availability zones for high availability
+ To create a Dedicated Tier cluster, you need to add a payment method or apply for a Proof of Concept (PoC) trial
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As the name states it is a dedicated resource with more features available.

Note: You cannot change the cluster storage size after your cluster is created.

HTAP
https://en.wikipedia.org/wiki/Hybrid_transactional/analytical_processing

High Availability
https://docs.pingcap.com/tidbcloud/high-availability-with-multi-az

Payment Method
https://docs.pingcap.com/tidbcloud/tidb-cloud-billing#payment-method

Proof of Concept
https://docs.pingcap.com/tidbcloud/tidb-cloud-poc