Connecting to a GeminiDB Redis Instance

Before connecting to an instance, you must buy an instance. For details, see Buying an Instance. GeminiDB Redis API is compatible with open-source Redis and allows traffic from applications using different types of SDKs. It can also be accessed through Data Admin Service (DAS), private networks, and public networks.

Figure 1 shows the process of connecting to a GeminiDB Redis instance. Table 1 describes the addresses and scenarios.

Figure 1 Connection Methods
Click to enlarge

**Table 1** Connection methods
Method	Scenario	Default Port	Description
DAS	You can connect to a GeminiDB Redis instance using a web-based console.	-	-
Private network	You can connect to a GeminiDB Redis instance using a private domain name, private IP address, or load balancer address. This method is suitable when your application is deployed on an ECS that is in the same region and VPC as your instance.	6379	You are advised to use the load balancer address to connect to the instance. This ensures high reliability and eliminates the impact of SPOFs. High security and performance If the ECS and GeminiDB Redis instance are in the same security group, they can communicate with each other by default. No security group rule needs to be configured. If they are in different security groups, configure security group rules for them, separately. Configure inbound rules of a security group for the GeminiDB Redis instance by following Setting Security Group Rules for a GeminiDB Redis Instance. The default security group rule allows all outbound data packets, so you do not need to configure a security rule for the ECS. If not all access from the ECS is allowed, you need to configure an outbound rule for the ECS.
Public network	You can connect to a GeminiDB Redis instance through a public domain name, an EIP, or an EIP bound to a load balancer. This method is suitable when an instance cannot be accessed over a private network. You can connect to the instance from an ECS using a public domain name or an EIP.	6379	For faster transmission and improved security, migrate your applications to an ECS that is in the same subnet as your instance and use a private IP address to access the instance. Bind an EIP to the load balancer to ensure high reliability and eliminate SPOFs. For EIP pricing details, see EIP billing details. NOTE: Redis Cluster GeminiDB Redis instances cannot be accessed over a public network.
Program code	You can connect to a GeminiDB Redis instance using different code. For details, see Examples of Connecting to an Instance Using Programming Languages.	6379	-