PolarDB

RDS for MySQL is a reliable and scalable cloud database service. You can deploy databases within minutes and stay focused on application development. Say goodbye to stressful database O&M once and for all. You can create a MySQL database in minutes with just a few clicks. RDS for MySQL facilitates software and hardware deployment and helps you manage your databases, including installing patches, monitoring metrics, dynamically scaling up or down, and failing over if needed. With optimized kernel thresholds, RDS for MySQL excels at handling massive amounts of concurrent requests. It outperforms the MySQL community edition. RDS for MySQL uses implicit primary keys to ensure almost zero delay of primary/standby replication. No data is lost even when your database is heavily loaded. As your storage requirements grow, you can easily provision 1 TB of storage for read replicas on-the-fly with zero downtime.

Amazon Aurora is a MySQL and PostgreSQL-compatible relational database built for the cloud, that combines the performance and availability of traditional enterprise databases with the simplicity and cost-effectiveness of open source databases. Amazon Aurora is up to five times faster than standard MySQL databases and three times faster than standard PostgreSQL databases. It provides the security, availability, and reliability of commercial databases at 1/10th the cost. Amazon Aurora is fully managed by Amazon Relational Database Service (RDS), which automates time-consuming administration tasks like hardware provisioning, database setup, patching, and backups. Amazon Aurora features a distributed, fault-tolerant, self-healing storage system that auto-scales up to 64TB per database instance. It delivers high performance and availability with up to 15 low-latency read replicas, point-in-time recovery, continuous backup to Amazon S3, and replication across three Availability Zones.