Step 1: Configure Basic Settings

The page for creating ECSs is displayed.

If the region is incorrect, click in the upper left corner of the page to select your region.

An AZ is a physical location that uses independent power supply and networks. AZs in the same region can communicate with each other over an intranet.

• To enhance application availability, create ECSs in different AZs.
• To shorten network latency, create ECSs in the same AZ.

• During the creation process, you can select a random AZ. The system will use a hash algorithm to select an AZ as the default AZ based on your universally unique identifier (UUID).
• The available ECS types and flavors vary depending on AZs. To view all supported ECS types and flavors on the cloud service platform, set AZ to Random. Then, the system automatically allocates an AZ according to your selected ECS flavor.

  For example, S3 ECSs are available only in AZ1; S2 ECSs are available in AZ2 and AZ3 and have been sold out in AZ1. If you set AZ to Random, you can view both S3 and S2 ECSs. If you create an S3 ECS, the system automatically allocates it to AZ1. If you create an S2 ECS, the system randomly allocates it to AZ2 or AZ3.

The cloud platform provides various ECS types for different application scenarios. You can choose from existing ECS types and flavors in the list. Alternatively, you can enter a flavor or specify vCPUs and memory size to search for the flavor suited to your needs.

• Before selecting an ECS type, learn about the introduction and notes on each type of ECSs. For details, see ECS Types.

• Public image

  A public image is a standard, widely used image. It contains an OS and preinstalled public applications and is available to all users. You can configure the runtime environment or software in the public image as needed.

• Private image

  A private image is an image available only to the user who created it. It contains an OS, preinstalled public applications, and the user's private applications. Using a customized private image, you can create ECSs tailored to your needs in batches.

  

  • If a full-ECS image is in Normal state and the system displays message "Available in AZx", the full-ECS image can be used to create ECSs in this AZ only. Additionally, the SCSI and sharing attribute settings of the system and data disks cannot be modified during ECS creation.
  • If a full-ECS image is in Normal state but the system does not display message "Available in AZx", the full-ECS image can be used to create ECSs in the entire region. Additionally, the SCSI and sharing attribute settings of data disks can be modified during ECS creation.
  • To ensure that NIC multi-queue is enabled on an ECS created using a private image, configure NIC multi-queue when creating such a private image. NIC multi-queue routes NIC interrupt requests among multiple vCPUs for higher network packets per second (PPS) and bandwidth.

    For details, see "How Do I Set NIC Multi-Queue Feature of an Image?"

• Shared image

  A shared image is a private image shared by another user.

• System disk

  For details about the disk types supported by ECS, see EVS Disks.

• Data disk

  You can create multiple data disks for an ECS and enable required functions for each data disk. During the creation process, you can add a maximum of 23 data disks for each ECS and customize the disk size as needed.

  Click Show and set the following functions if required:

  • SCSI: indicates that the device type of the data disk is SCSI if you select this option. For more information about SCSI disks and the ECSs that can be attached with SCSI disks, see .
  • Share: indicates that the EVS disk is sharable if you select this option. Such an EVS disk can be attached to multiple ECSs.