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DCS Instance Statuses Table 1 DCS instance statuses State Description CREATING Creating is the status before the Running state. CREATEFAILED The DCS instance failed to be created. RUNNING The instance is running properly. Only instances in the Running state can provide in-memory cache
Suggestions on Using DCS Service Usage Principle Description Remarks Deploy services nearby to reduce latency. If your service and DCS instance are deployed far from each other (not in the same region) or with a high latency (connected through public networks), the read/write performance
DCS Data Security Security is a shared responsibility between Huawei Cloud and you. Huawei Cloud is responsible for the security of cloud services to provide a secure cloud. As a tenant, you should properly use the security capabilities provided by cloud services to protect data,
DCS Best Practices This section summarizes best practices of Distributed Cache Service (DCS) in common scenarios. Each practice is given a description and procedure. Table 1 DCS best practices Best Practice Description Serializing Access to Frequently Accessed Resources Describes
Configuring DCS Instance Tags Tags facilitate DCS instance identification and management. Tags can be added in instance creation, or on the instance details page. A maximum of 20 tags are allowed for a DCS instance. If your organization has configured tag policies for DCS, add tags
Diagnosing a DCS Redis Instance If a fault or performance issue occurs, you can ask DCS to diagnose your instance to learn about the cause and impact of the issue and how to handle it. Notes and Constraints DCS Redis 3.0 and Memcached instances do not support diagnosis. New instances
Accessing a DCS Redis Instance Configuring Redis Network Connections Controlling DCS Redis Access Connecting to Redis on a Client Connecting to Redis on the Console Public Access to a DCS Redis 3.0 Instance (Discontinued)
Clearing DCS Instance Data To clear instance data, use the FLUSHDB or FLUSHALL commands on accessed instances, or the data clearance function on the DCS console. This section describes how to use the function to clear instance data with one click. Clearing instance data may cause
Exporting a DCS Instance List A list of instance information can be exported and downloaded in Excel on the DCS console. You can view or compare DCS instance information. Procedure Log in to the DCS console. Click in the upper left corner of the console and select the region where
Viewing DCS Background Tasks After you initiate certain instance operations such as scaling up the instance and changing or resetting a password, a background task will start for each operation. On the DCS console, you can view the background task status and clear task information
Applying for More DCS Quotas What Is Quota? A quota is a limit on the quantity or capacity of a certain type of service resources that you can use, for example, the maximum number of DCS instances that you can create and the maximum amount of memory that you can use. If a quota cannot
Buying a DCS Redis Instance You can buy one or more DCS Redis instances with the required computing capabilities and storage space based on service requirements. Preparing Required Resources DCS Redis instances are deployed in Virtual Private Clouds (VPCs), and bound to specific subnets
Modifying DCS Instance Specifications On the DCS console, you can change DCS Redis or Memcached instance specifications including the instance type, memory, and replica quantity. Modifying instance specifications does not affect the connection address, password, security group, and
DCS Backup and Restoration Overview On the DCS console, you can back up and restore DCS instances. Importance of DCS Instance Backup There is a small chance that dirty data could exist in a DCS instance owing to service system exceptions or problems in loading data from persistence
Viewing DCS Audit Logs With CTS, you can query, audit, and review operations performed on cloud resources. Traces include the operation requests sent using the management console or open APIs as well as the results of these requests. DCS Operations Supported by CTS Table 1 DCS operations
Configuring DCS Monitoring and Alarms This section describes the alarm rules of some metrics and how to configure the rules. In actual scenarios, configure alarm rules for metrics by referring to the following alarm policies. Alarm Policies for DCS Redis Instances Table 1 DCS Redis
Adjusting DCS Instance Bandwidth Generally, Redis instances save and obtain data in the data layer closer to application services, which consumes the network bandwidth. Rate limits may occur when the instance bandwidth is insufficient, causing increased service latency or client connection
Starting or Stopping a DCS Instance Redis 4.0 and later instances support instance stop. When an instance is stopped, data reading or writing is stopped so that the instance cannot be modified, configured, backed up, or migrated. You can neither change the password nor analyze the
Controlling DCS Redis Access Configuring DCS Redis Access Whitelist Configuring a Redis Password Transmitting DCS Redis Data with Encryption Using SSL Configuring DCS Redis ACL Users Parent topic: Accessing a DCS Redis Instance
DCS Data Migration Overview The DCS console supports online and backup (file) migration with intuitive operations. Incremental data can be migrated online. Online migration is suitable when the source Redis instance supports the SYNC and PSYNC commands. Data in the source Redis instance
