| Region |
The region where the cluster is deployed. You cannot change the region after you purchase
the cluster.
Note Ensure that the PolarDB cluster and the ECS instance to be connected are deployed in the same region. Otherwise,
the cluster and the ECS instance cannot communicate through the internal network and
can communicate through only the Internet. This compromises the performance.
|
| Create Type |
The method to create a PolarDB cluster.
- Create Primary Cluster: creates a PolarDB cluster.
- Restore from Recycle: creates a cluster by restoring a backup of a deleted cluster from the recycle bin.
- Source Version: the version of the cluster that has been deleted.
- Deleted Clusters: the name of the cluster that has been deleted.
- Backup History: Select the backup that you want to restore.
Note You can select other options to create databases of other engines.
|
| Primary Availability Zone |
The primary zone where the cluster is deployed.
- Each zone is an independent geographical location in a region. The zones that are
deployed in the same region are similar.
- You can deploy your PolarDB cluster and ECS instance in the same zone or in different zones.
- You need to select only the primary zone. The system automatically selects a secondary
zone.
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| Network Type |
The value of this parameter can be only VPC. You do not need to select the value of this parameter.
|
| VPC VSwitch
|
Ensure that the PolarDB cluster to be created and the ECS instance to be connected are deployed in the same
VPC. Otherwise, the cluster and the ECS instance cannot communicate over the internal
network to achieve optimal performance.
- If you have created a VPC that meets your network plan, select the VPC. For example,
if you have created an ECS instance and the VPC where the ECS instance is deployed
meets your network plan, select this VPC.
- If you do not create a VPC that meets your network plan, use the default VPC and the
default vSwitch.
- Default VPC:
- The default VPC is a unique VPC in the selected region.
- The subnet mask consists of 16 bits, such as 172.31.0.0/16. A maximum of 65,534 private
IP addresses can be provided.
- The default VPC is not included in the total number of VPCs that you can create.
- Default vSwitch:
- The default vSwitch is a unique vSwitch in the selected zone.
- The subnet mask consists of 20 bits, such as 172.16.0.0/20. A maximum of 4,094 private
IP addresses can be provided.
- The default vSwitch is not included in the total number of vSwitches that you can
create in a VPC.
- If the default VPC and vSwitch cannot meet your requirements, you can create your
own VPC and vSwitch. For more information, see Create and manage a VPC.
|
| Compatibility |
- MySQL 8.0: fully compatible with MySQL 8.0. MySQL 8.0 supports parallel queries. In specific
scenarios, the performance increases by 10 times. For more information, see Parallel query.
- MySQL 5.7: fully compatible with MySQL 5.7.
- MySQL 5.6: fully compatible with MySQL 5.6.
- PostgreSQL 11: fully compatible with PostgreSQL 11.
- Compatible with Oracle Syntax: highly compatible with the Oracle syntax. For more information, see Oracle compatibility.
|
| Edition |
By default, this parameter is set to Cluster .
|
| Node Specification |
Select the specifications as needed. All the nodes in the PolarDB cluster are dedicated
nodes with stable and reliable performance.
For more information about specifications of compute nodes, see Specifications and pricing.
|
| Nodes |
If the source cluster edition is Cluster , the system creates a primary node and a read-only node that have the same specification
by default. You do not need to specify this parameter.
Note If the primary node fails, the system uses the read-only node as the primary node
and creates another read-only node. For more information about read-only nodes, see
Architecture.
|
| Storage Cost |
You do not need to specify this parameter. The system charges you on an hourly basis
based on the actual data usage. For more information, see Specifications and pricing.
Note You do not need to select a storage capacity when you create a cluster. The system
automatically scales the storage capacity when the amount of data is increased or
decreased.
|
| Enable TDE |
Specify whether to enable transparent data encryption (TDE). After TDE is enabled,
PolarDB encrypts the data files of your cluster. This operation is transparent to service
access. The performance is reduced by 5% to 10%.
Note You cannot disable TDE after TDE is enabled.
|
| Cluster Name |
Enter a cluster name. The name must meet the following requirements:
- It cannot start with
http:// or https://.
- It must be 1 to 256 characters in length.
If this parameter is left empty, the system automatically generates a cluster name.
You can change the cluster name after the cluster is created.
|
| Resource Group |
Select a required resource group from available resource groups. For more information
about how to create a resource group, see Create a resource group.
Note A resource group is a container that contains a group of resources in an Alibaba Cloud
account. You can manage these resources in a centralized manner. A resource belongs
to only one resource group. For more information, see Use RAM to create and authorize resource groups.
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