Last Updated: Dec 11, 2017

Term Description
Redis ApsaraDB for Redis is a high-performance Key-Value storage system (cache and store) released in compliance with the BSD open-source protocol.
Instance ID An instance corresponds to a user space, and serves as the basic unit of using ApsaraDB for Redis. ApsaraDB for Redis limits connection quantities, bandwidth, CPU specifications, and other parameters based on the capacity specifications of individual instances. On the console, you can view the list of IDs of the instances you have purchased.
Master-Slave dual-node instance This is an ApsaraDB for Redis instance that adopts a master-slave architecture. Master-slave dual-node instances provide limited capacity and performance.
High-performance cluster instance This is an ApsaraDB for Redis instance that adopts a scalable cluster architecture. Cluster instances have better scalability and performance, but are functionally limited to a certain extent.
Connection address This is the host address used to connect to ApsaraDB for Redis. It is displayed as a domain name, and can be found at Instance Information > Connection Information.
Connection password This is the password used to connect to ApsaraDB for Redis. The password format is Instance ID:custom password. For example, if you set the password as 1234 when you make the purchase and the allocated instance ID is xxxx, then the connection password is xxxx:1234.
Eviction policy This is consistent with the Redis eviction policy. For more information, see the official document.
DB This is the abbreviation of database in Redis. By default, each ApsaraDB for Redis instance supports 256 databases numbered DB 0 to DB 255. By default, data is written to DB 0.
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