What Is the Connection Address of an Instance?
The connection address of an instance adopts a uniform format: virtual IP+ fixed port. After capacity expansion, the virtual IP address automatically switches to the new VM. The IP address remains unchanged for applications and you are not required to change the application code.
How Do I Activate the Public IP for an Instance?
To access Redis from a public network, on the instance details page, you can click Bind Public IP to bind and enable a public IP.
Note:
l Apply for an EIP first to realize access through a public network. For details, see Purchasing an EIP. You will be charged for traffic fees if an EIP is used. It also increases network latency, compromises service performance, and results in security risks. We recommend that you connect to instances by using Virtual Private Clouds (VPCs) for lower network latency and higher security.
l If the instance has the native cluster architecture and is in direct-connect mode, then it does not support public access. You cannot access the Redis instance through the Internet. Please access the instance through a private network.
What Is the Expiration Time of an Instance?
A subscription-based instance expires at the end of a calendar month. A pay-as-you-go instance expires when the resources are exhausted.
What is the Maintenance Time for an Instance?
We recommend that you set the maintenance window to off-peak hours based on your business requirements. This prevents interruptions to your business.
After the DCS Redis instance is created, if you need to modify the instance maintenance window, you can go to the instance details page on the management console to modify it. During this time window, service and O&M personnel can perform maintenance operations on your instance.
What Are the Supported Functions of Instance Application Data Management?
The DCS Redis instance console provides application data management function and supports the management of DB data of the DCS instance through the command window, including adding, deleting, and modifying key-value pairs, as well as clearing group data.
On the instance data management menu, the data of different database groups is displayed on pages. On these pages, you can query the total number of keys in a database group, and add, delete, change and view the page information for a single key.
What Is the Size of the Available Memory for Instances?
Some resources are occupied by the system. As a result, the memory available for Redis instances is smaller than the standard value. You are advised to expand the capacity when 80% of Redis memory is used up, and set the expiration time for keys to release memory properly.
What Is the Possible State of an Instance?
Possible states: Enabling, Running, About to Expire, and Expired.
Why Is the Frontend Cluster Empty in the Instance List?
For stand-alone and active/standby instances, the application directly connects to Redis nodes through a virtual IP without an intermediate proxy layer. Therefore, the Frontend cluster in the instance list is empty.
What Is the Relationship Between an Instance Name and an Instance ID?
An instance ID is the unique identifier of a Redis instance, and an instance name is the alias of the instance. In the new version, you can change the instance name but cannot change the instance ID.
Is the Processing Method for Instances in Different Billing Modes the Same After Unsubscription?
If you unsubscribe from a subscription-based instance, the instance will be frozen and will be automatically released after 15 days by default. A pay-as-you-go instance is released immediately after unsubscription.
How Does the System Distribute the Slots in Stand-alone and Active/Standby Instances or Clusters?
The slots of stand-alone and active/standby instances range from 0 to 16383. A cluster has 1638 slots evenly distributed among Redis shards.
Why Is the Status of an Instance Displayed as "Frozen"?
Generally, the Frozen status is displayed because it is a subscription-based instance and is not renewed after expiration. During the freezing period, the instance cannot be used and can work properly after renewal.