DB Instances

DB instances are the smallest management units used by GaussDB(openGauss). Each is an isolated database environment on the cloud. You can create and manage DB instances on the management console. For details about DB instance types, specifications, engines, versions, and statuses, see DB Instance Description.

Instance Versions

Currently, only 2020 Enterprise Edition is supported.

DB Instance Types

Distributed DB instances are supported. A distributed DB instance supports capability expansion through shards to cope with highly concurrent access to massive volumes of data.

DB Instance Classes

DB instance classes consist of vCPUs and memory (GB). For details, see DB Instance Classes.

Automated Backups

When you create a DB instance, the automated backup function is enabled by default. After the DB instance is created, you can modify the backup policy. GaussDB(openGauss) will automatically create backups for DB instances based on your settings.

Manual Backups

Manual backups are user-initiated full backups of DB instances. They are retained until you delete them manually.

Regions and AZs

A region and availability zone (AZ) identify the location of a data center. You can create resources in a specific region and AZ.

• Regions are divided from the dimensions of geographical location and network latency. Public services, such as Elastic Cloud Server (ECS), Elastic Volume Service (EVS), Object Storage Service (OBS), Virtual Private Cloud (VPC), Elastic IP, and Image Management Service (IMS), are shared within the same cloud region. Regions are classified as Global region and specific regions. The Global region provides common cloud services for all tenants, and a specific region provides only services of the same type for specific tenants.
• An AZ contains one or multiple physical data centers. Each AZ has independent cooling, fire extinguishing, moisture-proof, and electricity facilities. Within an AZ, computing, network, storage, and other resources are logically divided into multiple clusters. AZs within a region are interconnected using high-speed optical fibers to support cross-AZ high-availability systems.

Figure 1 shows the relationship between regions and AZs.

Figure 1 Regions and AZs

HUAWEI CLOUD provides services in many regions around the world. You can select a region and AZ as needed. For more information, see HUAWEI CLOUD Global Regions.

Projects

Projects are used to group and isolate OpenStack resources (computing resources, storage resources, and network resources). A project can be a department or a project team. Multiple projects can be created for one account.