This topic defines key terms for ApsaraDB for MyBase.
Concepts | Description |
Cluster | MyBase cluster is a collection of database engines that are managed by a deployed MyBase control service. A single control service can manage multiple database engines and instances. |
Service | A service is an atomic control service provided by MyBase. Examples include the instance lifecycle management service Operator, the high availability service Orchestrator, and monitoring services such as Prometheus and Grafana. |
Component | An internal component of an atomic control service. For example, the Master and Agent components in Prometheus. |
Node pool | A collection of nodes used to deploy control services or database engine instances. For easier management and resource scheduling, MyBase separates nodes into the following pools:
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Node | A node is equivalent to a virtual server. |
Cloud disk | A block-level block storage product that uses a distributed triplicate mechanism. It provides 99.9999999% data reliability for ECS instances. |
Local disk | A local hard disk on the physical server that hosts an ECS instance. It provides high I/O performance and is cost-effective for mass storage. However, its data reliability depends on the physical server, creating a risk of a single point of failure. |
Database instance | A database engine instance that is created and managed by MyBase. For example, a primary/secondary high-availability MySQL instance. |
Region | A region is a physical data center. You cannot change the region of a resource after it is created. For more information, see Regions and zones. |
Security group | A virtual firewall that lets you control inbound and outbound traffic for an instance. For more information, see Security groups. |
SSH key pair | A secure and convenient logon authentication method. It consists of a public key and a private key and is supported only on Linux instances. For more information, see SSH key pairs. |
Virtual private cloud (VPC) | A custom private network built on Alibaba Cloud. Different VPCs are logically isolated from each other. You have full control over your VPC, such as selecting IP address ranges and configuring route tables and gateways. For more information, see What is a VPC?. |