Hologres:Purchase a Hologres instance

Procedure

1. Go to the Hologres product page.

2. Click Buy Now.

   Note

   • If a RAM permission error occurs, grant the required permissions to the current RAM user. For more information, see Grant permissions to a RAM user.

   • If you are purchasing a Hologres instance for the first time, you must create a service-linked role. At the bottom of the purchase page, find the Service-linked Role section and click Create Service-linked Role.

3. Select a Commodity Type.

   Product type	Description
   Exclusive Instance	Provides dedicated computing resources, millisecond-level responses, and a full range of features. Subscription: Ideal for long-term use. Offers significant discounts and lower prices. Pay-as-you-go: Ideal for short-term use and billed by the hour. You can switch between Subscription and Pay-as-you-go.
   Shared Cluster (Lakehouse Acceleration Edition)	Differences from an Exclusive Instance: Features: Supports only accelerated queries on data in MaxCompute and Object Storage Service (OSS). It does not support importing data into internal Hologres tables. Billing: Billing is based on the amount of data scanned per query. For more information, see Billing. Use cases: Suitable for accelerating low-frequency queries on MaxCompute and OSS data that require sub-second response times.

   You cannot convert an Exclusive Instance to a Shared Cluster or vice versa. For more information, see Comparison of Exclusive Instances and Shared Clusters.

4. Select a Region and Zone.

   • To connect Hologres to other Alibaba Cloud services over an internal network, you must deploy them in the same region and VPC. If they are in different regions, you must connect them over the internet or use a method such as VPC peering to establish an internal network connection.

   • You cannot change the region or zone after you create an instance.

   • The choice of zone does not affect connectivity or performance.

5. Configure the instance specifications based on the selected product type.

Exclusive instances

Parameter	Description
Instance Type	General-purpose: Provides a rich set of features and supports load isolation and horizontal scaling with read-only secondary instances. Virtual Warehouse: Provides better load isolation, more flexible access control, and simpler connection management than the General-purpose type. You can also configure parameters independently for each virtual warehouse. This type incurs additional gateway fees compared to the General-purpose type but provides more granular scalability. Serverless: Suitable for the pay-as-you-go model. You do not need to purchase computing resources in advance. You are charged based on the actual amount of Serverless resources and storage used. For more information, see What is a Hologres Serverless instance?. For more information, see Virtual Warehouse instances.
Computing resources	If you select the General-purpose type, configure the following parameter: Computing Resources: Select the resources based on your needs. You can scale the resources up or down later. For information about how to choose specifications, see Instance specifications overview. If you select the Virtual Warehouse type, configure the following parameters: Number of Gateway Nodes: Gateways forward requests. A minimum of two nodes ensures high availability. You can use the default value of 2 and adjust it later. Reserved Computing Resources of Virtual Warehouse: Ranges from 32 CU to 8,192 CU in increments of 16 CU. You can scale the resources up or down later. For information about how to choose specifications, see Instance specifications overview. Note A single virtual warehouse requires a minimum of 32 CUs. Purchase reserved computing resources based on the number of virtual warehouses you need. For more information about Virtual Warehouse instances, see Virtual Warehouse instances. Allocate to Initial Virtual Warehouse: This is a fixed value and requires no configuration.
Serverless computing	Enabling this feature lets specific DML operations use a dedicated Serverless resource pool, preventing resource waste and contention. Note This feature is available only in specific regions and zones. For more information, see Serverless computing user guide. You can also enable or disable this feature after you create the instance.
Storage resources	For subscription instances, you can purchase storage capacity (Standard Storage and Infrequent Access Storage). Hologres automatically bills storage usage that exceeds the purchased capacity on a pay-as-you-go basis. You can also purchase storage capacity after the instance is created. If you do not purchase storage capacity, all storage is billed on a pay-as-you-go basis by default. Storage Redundancy Type: Locally Redundant Storage supports only single-zone deployment. This mode stores data in a single zone, posing a risk to high availability. If your service has high availability requirements, we recommend that you select Zone-redundant Storage (ZRS) (3AZ). For more information about different storage redundancy types, see Zone-level disaster recovery based on 3AZ.
Network resources	VPC: Hologres and other Alibaba Cloud services can connect over an internal network only if they are in the same region and VPC. If they are in different regions, you must connect them over the internet or use a method such as VPC peering to establish an internal network connection. When you create an instance, select the same VPC as your existing cloud resources to avoid cross-VPC network configurations. You cannot select the same VPC in cross-account scenarios. vSwitch: The choice of vSwitch does not affect connectivity or performance. Note VPCs and vSwitches are free of charge.

Shared clusters

Network resources:

• VPC: Hologres and other Alibaba Cloud services can connect over an internal network only if they are in the same region and VPC. If they are in different VPCs, you must connect them over the internet or use a method such as VPC peering to establish an internal network connection.

• vSwitch: The choice of vSwitch does not affect connectivity or performance.

Note

VPCs and vSwitches are free of charge.

6. Set the Instance Name and Resource Group. For Subscription instances, also specify the Duration. Then, click Buy Now.

7. On the Confirm Order page, review the parameter settings, read and select the terms of service, and then click Enable.

8. On the Activation Completed page, confirm that the activation is successful. The Hologres instance is ready in minutes. Click management console .

9. On the Hologres Instances page, find the instance and check its status. A Status of Running indicates the instance is ready.