Google Cloud Professional Data Engineer Exam

Which storage solution is more suitable for supporting a global transactional database requirement?

1. Cloud SQL

2. Cloud Bigtable

3. Cloud Spanner

4. Cloud Firestore

The correct answer is: Cloud Spanner

Cloud Spanner is the most suitable storage solution for supporting a global transactional database requirement due to its unique architecture that combines the benefits of traditional relational databases with the scalability of NoSQL databases. It provides strong consistency and supports SQL queries, making it ideal for handling transactions across multiple regions and adhering to ACID properties (Atomicity, Consistency, Isolation, Durability). One of the key features of Cloud Spanner is its ability to scale horizontally while maintaining high performance, which is essential for global applications that experience high traffic. The automatic sharding and replication across different geographic locations ensure that data is available and can be written to, no matter where users are accessing the database from. Additionally, Cloud Spanner uses a distributed architecture that allows it to handle increased workloads without a drop in performance, making it particularly well-suited for organizations that require a robust solution for a high number of concurrent transactions and must maintain data integrity across a global setup. This capability to seamlessly manage distributed transactions and offer global availability makes Cloud Spanner the optimal choice for companies with global transaction needs.