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Resource Orchestration Service:Limits

Last Updated:Jun 04, 2026

ROS imposes limits on templates, stacks, stack groups, resource scenarios, and modules.

Templates

Limit item

Limit value

Templates per Alibaba Cloud account

200

Template file size

512 KB

Versions per template

100

Shared users per template

200

Stacks

Limit item

Limit value

Stacks per Alibaba Cloud account

200

Resources per stack

300

Concurrent stack operations per Alibaba Cloud account

50

Nesting depth per nested stack

5

Maximum stack timeout

1440 minutes (24 hours)

Minimum stack timeout

10 minutes

Stack policy file size

16 KB

Custom resource response size

4096 KB

Change sets per stack per Alibaba Cloud account

20

Change set file size

2048 KB

Stack groups

Limit item

Limit value

Stack groups per Alibaba Cloud account

100

Stack instances per stack group per Alibaba Cloud account

2000

Concurrent stack group operations per Alibaba Cloud account

3500

Accounts per stack group operation

30

Resource directory folders per stack group operation

20

Regions per stack group operation

20

Resource scenarios

Limit item

Limit value

Resource scenarios per Alibaba Cloud account

500

Resources per resource scenario

300

Modules

Limit item

Limit value

Modules per Alibaba Cloud account

100

Versions per module

100