• Auto Scaling

as
  1. Help Center
  2. Auto Scaling
  3. User Guide
  4. Service Overview
  5. Use Restrictions

Use Restrictions

AS has the following restrictions:

  • Only applications that are stateless and can be horizontally scaled can run on instances in an AS group. AS automatically releases instances. Therefore, the instances in AS groups cannot be used to save application status information (such as sessions) and related data (such as database data and logs).

    If the application status or related data must be saved, you can store the information on separate servers.

  • AS requires authentication provided by Identity and Access Management (IAM).

    AutoScaling Administrator requires permissions of Tenant Guest, Server Administrator, CES Administrator, and ELB Administrator.

    NOTE:

    If the Cloud Eye administrator is not available, you can only use an existing alarm to create an alarm policy. If the ELB administrator is not available, you can still use existing load balancers.

  • AS resources must comply with quota requirements listed in Table 1.
    Table 1 Quota list

    Category

    Description

    Default Value

    AS group

    Maximum number of AS groups that a user can create

    25

    AS configuration

    Maximum number of AS configurations that a user can create

    100

    AS policy

    Maximum number of AS policies that can be added to an AS group

    50

    Instance

    Maximum number of instances that can be added to an AS group

    200

    Bandwidth scaling policy

    Maximum number of bandwidth scaling policies that you can create

    50