Create a dedicated cluster

Notes

• One ApsaraDB for MyBase dedicated cluster resides in only one region.
• One ApsaraDB for MyBase dedicated cluster belongs to only one virtual private cloud (VPC).
• The name of an ApsaraDB for MyBase dedicated cluster must be unique in the region where the dedicated cluster resides.
• The SQL Server engine is not supported in the following regions: China (Zhangjiakou), China (Hohhot), Australia (Sydney), Malaysia (Kuala Lumpur), US (Silicon Valley), US (Virginia), and India (Mumbai).
• The Redis engine is not supported in the following regions: Australia (Sydney), Malaysia (Kuala Lumpur), US (Silicon Valley), US (Virginia), and India (Mumbai).

Create an ApsaraDB for MyBase dedicated cluster

1. Log on to the ApsaraDB for MyBase console.
2. In the upper-left corner of the page, select the region where you want to deploy the dedicated cluster.
   
3. On the Clusters page, click Create Dedicated Cluster.
   
4. In the Create Dedicated Cluster panel, configure the following parameters.
   

   Parameter	Description
   Engine	The database engine of the dedicated cluster. MySQL and SQL Server are available. Other database engines will be supported in later versions.
   CPU Overcommit Ratio	The CPU overcommitment ratio of the dedicated cluster. The CPU overcommitment ratio ranges from 100% to 300%. The default ratio is 200%. If you keep the default setting, the CPU resources that can be allocated are twice as many as the CPU resources that are provided. This maximizes CPU utilization.
   Storage Overcommit Ratio	The storage overcommitment ratio of the dedicated cluster. The storage overcommitment ratio ranges from 100% to 200%. The default ratio is 200%. If you keep the default setting, the storage resources that can be allocated are twice as many as the storage resources that are provided. This maximizes storage utilization.
   Maximum Memory Usage	The maximum memory utilization of each host in the dedicated cluster. The maximum memory utilization ranges from 0% to 90%. The default value is 90%.
   Resource Allocation Policy	The default policy that is used to schedule resources in the dedicated cluster. Balanced Allocation: New database instances are preferentially created on hosts that have the most available resources to maximize cluster stability. Compact Allocation: New database instances are preferentially created on hosts where existing instances are created. This maximizes resource utilization.
   Deployment Method	High-availability: You can deploy only instances of the High-availability Edition, which are HA instances for short. Enterprise/Basic: You can deploy only the instances of the Enterprise Edition (three nodes) or the Basic Edition (one node). Note If you select High-availability, both local disks and disks are supported. If you select Enterprise/Basic, only disks are supported.
   VPC	The VPC to which the dedicated cluster is connected. To create a VPC, log on to the VPC console. Note After you create a dedicated cluster, you cannot change the VPC to which the dedicated cluster is connected. To connect to another VPC, delete the dedicated cluster and create another dedicated cluster.
   Host Troubleshooting Policy	The policy that is used to handle host failures in the dedicated cluster. Automatic Host Replacement: The system automatically replaces faulty hosts. Note If a faulty host uses disks, the host is replaced only after the auto snapshot feature of the host storage is enabled. If a faulty host uses local disks, the host is replaced only after all instances are removed from the host. Manual Host Replacement: You must manually replace faulty hosts.
   Grant OS Permissions	If you enable this feature for a dedicated cluster that runs the MySQL database engine, you can log on to the hosts in the dedicated cluster to perform operations such as uploading, downloading, and installing software. This feature is unavailable for dedicated clusters that run other database engines.

5. If you create an ApsaraDB for MyBase dedicated cluster by using this Alibaba Cloud account for the first time, a message appears at the bottom of the panel. The message prompts you to grant ApsaraDB for MyBase the permissions on the elastic network interfaces (ENIs) of Elastic Compute Service (ECS) instances and security groups. Click Authorize Now.
6. Click Create.

Tutorial video

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