What Are Restrictions on Using AS?

Only applications that are stateless and horizontally scalable can run on instances in an AS group. ECS instances in an AS group can be released automatically by AS, so they cannot be used to save application status information (such as session statuses) or 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.

Table 1 lists the AS quotas.

**Table 1** Quotas
Item	Description	Default
AS group	Maximum number of AS groups per region per account	10
AS configuration	Maximum number of AS configurations per region per account	100
AS policy	Maximum number of AS policies per AS group	10
Instance	Maximum number of instances per AS group	300
Bandwidth scaling policy	Maximum number of bandwidth scaling policies per region per account	10