Hologres:Purchase an instance

Procedure

1. Go to the Hologres product page.

2. Click Buy Now.

   Note

   • If a RAM permission error occurs, grant permissions to the current RAM user.

   • When purchasing a Hologres instance for the first time, click Create Service-linked Role at the bottom of the purchase page.s

3. Set Product Type.

   Product type	Description
   Exclusive instance	Both subscription and pay-as-you-go exclusive instances offer millisecond-level responses and a complete feature set. Subscription: Ideal for long-term use, offering significant cost savings. Pay-as-you-go: Ideal for short-term needs, with hourly billing. You can switch between the subscription and pay-as-you-go billing methods.
   Shared Cluster (BI-based MaxCompute Acceleration Edition)	Differences from exclusive instances: Highlights and limitations: Accelerating queries on data in MaxCompute and OSS. It does not support importing data into Hologres tables. Billing: Based on the amount of data scanned per query. See Billing. Ideal for scenarios requiring query acceleration for data in MaxCompute and OSS, where query frequency is low and sub-second response times are necessary.

   You cannot switch between exclusive instances and shared cluster instances.

4. Set Region and Zone. Note the following:

   • Hologres can directly connect to Alibaba Cloud services within the same Virtual Private Cloud (VPC) network. For cross-region access, you can use the public network or VPC peering for an internal network connection.

   • The instance's region and zone cannot be changed after creation.

   • Zone selection does not impact connectivity or performance.

5. Configure the parameters based on the product type.

Exclusive instances

Parameter	Description
Specifications	General-purpose: Offers a rich feature set and supports read-only secondary instances for load isolation. Virtual Warehouse Instance: Provides superior load isolation, more flexible permission control, and simpler connection management. They also allow for independent parameter settings per virtual warehouse. While incurring additional gateway costs, this instance type offers more granular scaling. For more information, see Virtual warehouse instance.
Computing resources	For general-purpose instances: Computing Resources: Select computing resources as needed, which can be adjusted later on. For details, see Overview of instance specifications. For virtual warehouse instances: Gateway Nodes: Gateways forward requests. A minimum of two gateway nodes is required for high availability. You can start with the default value of 2 and adjust it as needed. Reserved Computing Resources of Virtual Warehouse: These resources range from 32 CUs to 2,048 CUs, in increments of 16 CUs. You can scale these resources up or down later. For details, see Overview of instance specifications. Note A single virtual warehouse requires at least 32 CUs. Purchase reserved computing resources based on the number of virtual warehouses you need. For more information, see Virtual warehouse instance. Allocate to Initial Virtual Warehouse: Fixed to Yes.
Enable serverless computing	When enabled, specific DML operations are routed to an independent serverless resource pool to prevent resource contention and waste. Note This feature is supported in specific regions. See Serverless Computing guide. It can be enabled or disabled after the instance is created.
Storage resources	For subscription instances, you can purchase storage space (Standard and Infrequent Access). Usage exceeding the purchased amount is billed on a pay-as-you-go basis. You can also purchase additional storage space after the instance is created. If no storage space is purchased upfront, all usage will be billed on a pay-as-you-go basis by default.
Network resources	VPC: Hologres and other Alibaba Cloud services in the same VPC can connect to each other. If they are in different VPCs, you need to connect them over the internet or connect across VPCs. vSwitch: vSwitch selection does not impact connectivity or performance. Note VPCs and vSwitches are free of charge.

Shared cluster instances

Network resources:

• Virtual Private Cloud (VPC): Hologres can connect to an Alibaba Cloud service over an internal network only if they are in the same region and VPC. If the services are in different VPCs, you can connect them over the internet or use VPC peering for an internal network connection.

• vSwitch: You can select any vSwitch without affecting connectivity or performance.

Note

VPCs and vSwitches are free of charge.

6. Configure the instance name, resource group, and subscription duration (only for subscription instances), and click Buy Now.

Note

When purchasing a Hologres instance for the first time, click Create Service-linked Role at the bottom of the purchase page.

7. Confirm the order and complete the purchase.

8. Your Hologres instance will be ready in a few minutes.