Cosmos DB


### Relation with BlockChain
> [이게 대체 뭐하는 DB - Azure Cosmos DB](https://youngjaekim.wordpress.com/2019/03/30/%EC%9D%B4%EA%B2%8C-%EB%8C%80%EC%B2%B4-%EB%AD%90%ED%95%98%EB%8A%94-db-azure-cosmos-db/)







