Step 3: Configure Advanced Settings

Advanced Settings

Set ECS Name.
The name can be customized but can contain only letters, digits, underscores (_), hyphens (-), and periods (.).

If you want to create multiple ECSs at a time, the system automatically sequences these ECSs.

If multiple ECSs are created at the same time, the system automatically adds a hyphen followed by a four-digit incremental number to the end of each ECS name. For example, if you enter ecs, the ECSs will be named ecs-0001, ecs-0002, ... If you create multiple ECSs again, the values in the new ECS names increase from the existing maximum value. For example, the existing ECS with the maximum number in name is ecs-0010. If you enter ecs, the names of the new ECSs will be ecs-0011, ecs-0012, ... When the value reaches 9999, it will start from 0001.

Allow duplicate name: allows ECS names to be duplicate. If you select Allow duplicate name and create multiple ECSs in a batch, the created ECSs will have the same name.

The ECS Name set in this step will be the initial host name in the ECS OS.

Consecutive periods (.) or hyphens (-) will be replaced with the first character to prevent unknown issues.

Set Login Mode.

Password

A username and its initial password are used for ECS login authentication.

The initial password of user root is used for authenticating Linux ECSs, while that of user Administrator is used for authenticating Windows ECSs.

The passwords must meet the requirements described in Table 1.

**Table 1** Password complexity requirements
Parameter	Requirement
Password	Consists of 8 to 26 characters. For specific requirements on the password length, see the information displayed on the console. Contains at least three of the following character types: Uppercase letters Lowercase letters Digits Special characters for Windows: $!@%-_=+[]:./,? Special characters for Linux: !@%-_=+[]:./^,{}? Cannot contain the username or the username spelled backwards. Cannot contain more than two consecutive characters in the same sequence as they appear in the username. (This requirement applies only to Windows ECSs.) Cannot start with a slash (/) for Windows ECSs.

The system does not periodically change the ECS password. It is recommended that you change your password regularly for security.

Image password
If you use a Linux private image to create an ECS, you can use the image password for login authentication. Make sure that a password has been set for the selected private image.
Set password later
The password for logging in to the ECS is not configured during the ECS creation. After the ECS is created, select Reset Password in the Operation column, set a password for the ECS as prompted, and log in to the ECS.

Set Cloud Backup and Recovery.
Cloud Backup and Recovery (CBR) provides backup protection for EVS disks and ECSs, and uses backups to restore the EVS disks and ECSs. After you set Cloud Backup and Recovery, the system binds the target ECS to the cloud backup vault and associates the ECS with the selected backup policy to periodically back up the ECS.

The following options are provided:
- Create new
  1. Set the name of the cloud backup vault, which consists of 1 to 64 characters, containing only letters, digits, underscores (_), and hyphens (-). For example, vault-f61e. The default naming rule is vault_xxxx.
  2. Enter the vault capacity, which is required for backing up the ECS. The vault capacity cannot be smaller than that of the ECS to be backed up. Its value ranges from the total capacity of the ECS to 10,485,760 in the unit of GB.
  3. Select a backup policy from the drop-down list, or log in to the CBR console and configure a desired one.
- Specify
  1. Select an existing cloud backup vault from the drop-down list.
  2. Select a backup policy from the drop-down list, or log in to the CBR console and configure a desired one.
- Do not use
  Skip this configuration if CBR is not required. If you need to enable CBR after creating an ECS, log in to the CBR console, locate the target vault, and bind the ECS to the vault.
Set ECS Group (Optional).
An ECS group applies the anti-affinity policy to the ECSs in it so that the ECSs are automatically allocated to different hosts. This configuration is optional. For instructions about how to create an ECS group, see Managing ECS Groups.

An existing ECS attached with a local disk cannot be added to an ECS group. To use ECS group functions, select an ECS group when creating an ECS.
Configure automatic recovery.
If a physical server accommodating ECSs breaks down, the ECSs with automatic recovery enabled will automatically be migrated to a functional server to minimize the impact on your services. During this process, the ECSs will restart. If automatic recovery is not enabled, the affected users must wait for the system administrator to recover ECSs once the physical server becomes faulty. For more information about automatic recovery, see Automatically Recovering ECSs.
An ECS with any of the following resources cannot be automatically recovered:
- Local disk
- Passthrough FPGA
- Passthrough InfiniBand NIC
To use functions listed in Advanced Options, select Configure now. Otherwise, do not select it.
- User Data
  You can specify the user data. The user data will be automatically passed to the ECS when the ECS starts for the first time. This configuration is optional.
  
  For example, if you activate user root permission by passing a script file to an ECS, you can log in to the ECS as user root.
  
  For detailed operations, see Passing User Data to ECSs.
- Agency
  This configuration is optional. When your ECS resources need to be shared with other accounts, or your ECS is delegated to professional personnel or team for management, the tenant administrator creates an agency in IAM and grants the ECS management permissions to the personnel or team. The delegated account can log in to the cloud system and switch to your account to manage resources. You do not need to share security credentials (such as passwords) with other accounts, ensuring the security of your account.
  
  If you have created an agency in IAM, you can select the agency from the drop-down list and obtain specified operation permissions. For instructions about how to create an agency, see Identity and Access Management User Guide.
Click Next: Confirm.