Database > EasyCache > Overview

NHN Cloud EasyCache is a service that provides Valkey or Redis (REmote DIctionary Server) in a cloud environment. You can use a highly available in-memory cache server with simple settings.

Characteristics and Features

  • To use EasyCache, you must activate the Compute & Network service.

Replication Group

  • A group of in-memory cache servers that can be created instantly when you want.
  • You can use management features.
  • You can use replication group securely using certificates.

Monitoring

  • You can view the measurements to monitor the cache performance of the server in graphs.

Backup

  • You can perform automatic backup of memory data at specified time, once per day.
  • You can perform manual backup of memory data instantly at the time you want.
  • The data is stored in safe external storage.
  • Using the stored backup data, a new replication group can be created at any time.

Profile Configuration

  • You can manage the configuration of Valkey and Redis servers with profiles.
  • You can configure a default profile or a user profile.

Alarm

  • You can get notification on the event and monitoring status of replication groups.
  • You can manage the events and threshold settings for monitoring.

Event

  • You can search for and check the status of replication groups and nodes.

Glossary

Replication Group

  • A replication group is provided as Standalone and Replication types.
  • Server specification supports 2-64 GB memory.
  • You can create a replication group with virtual devices of all specifications provided by the Compute & Network service of NHN Cloud.
  • You cannot access the operating system of a replication group directly. You can access a Valkey server using the assigned domain and the port that you entered when creating a replication group.
  • You can create a replication group only when you select VPC subnet in the Compute & Network service, and you can communicate with the instance of the Compute & Network service through VPC subnet.
  • A replication group is disconnected from external networks, except for the user's subnet. If connection from an external network is required, floating IP must be attached.
  • If you are using the Compute & Network service, you can configure a subnet for connection when you create a replication group.
  • Network connection is enabled between the replication group and the instance in the connected subnet.
  • A master is a general instance that allows read and write operations.
  • A replica is an instance that replicates a master in real time.

Availability Zone

  • A logical area where a replication group is created.

Floating IP

  • A dynamic IP used for communication with external networks.
  • To use a floating IP, an internet gateway must be associated with the user's VPC subnet attached to the instance to be configured.
  • The Valkey of instance associated with a floating IP is accessible from external network through a public domain.
  • You will be charged for a floating IP as soon as it is created, apart from Valkey instances.

High Availability (Automatic HA)

  • If you use the HA feature, the service monitors the master of replication group, detects failure, and performs failover automatically. This feature can reduce the service downtime as much as possible.
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