PolarDB is a next-generation cloud-native database independently developed by Alibaba Group. PolarDB decouples computing from storage and uses integrated software and hardware. PolarDB provides a database service solution that enables auto scaling, high performance, mass storage, and high security and reliability. PolarDB is fully compatible with MySQL 5.6, MySQL 5.7, MySQL 8.0, and PostgreSQL 11. PolarDB is also highly compatible with Oracle.
PolarDB uses an architecture that decouples computing from storage. All compute nodes share one set of data. PolarDB allows you to upgrade or downgrade specifications in minutes, and supports fault recovery in seconds. PolarDB ensures global data consistency, and offers data backup and disaster recovery. The feature of data backup and disaster recovery is free of charge. PolarDB combines the benefits of commercial databases with the benefits of open source cloud databases. The benefits of commercial databases include stability, reliability, high performance, and scalability. The benefits of open source cloud databases include ease of use, openness, and self-iteration. PolarDB for MySQL is fully compatible with native MySQL databases and ApsaraDB RDS for MySQL databases. You can migrate data from a MySQL database to a database of the PolarDB for MySQL without the need to modify the code or configuration of your applications.
A PolarDB cluster of the Cluster Edition contains one primary node and a maximum of 15 read-only nodes. A minimum of one read-only node is required to provide high availability in active-active mode. If a cluster ID starts with
pc, it indicates that the cluster is a PolarDB cluster.
A node is a database service process that exclusively occupies physical memory. If a node ID starts with
pi, it indicates that the node is a PolarDB instance.
A database is a logical unit that is created on a node. You can create multiple databases on a node. The name of each database on the node must be unique.
- region and zone
A region is a geographic area where a data center resides. A zone is a geographic area in a region. This area has an independent power supply and network. For more information, see Alibaba Cloud's Global Infrastructure.
Alibaba Cloud offers an easy-to-use web console to help you manage various Alibaba Cloud services and products. This includes the cloud database service PolarDB. In the console, you can create, connect to, and configure PolarDB databases.
Log on to the PolarDB console: PolarDB console