Simple Application Server has specific limits on features and service performance. Before you use Simple Application Server, we recommend that you understand these limits to ensure that your business requirements can be met. This topic describes the limits of Simple Application Server resources.
Servers
Limit | Description |
Instance quota | By default, you can purchase a maximum of 50 simple application servers in a region for an Alibaba Cloud account. For information about how to increase the quota, see View or increase instance quotas. |
Virtualization software and secondary virtualization | Simple application servers do not support installation of virtualization software and secondary virtualization. |
Sound card applications | Simple application servers do not support sound card applications. |
External hardware devices | External hardware devices, such as USB devices, USB security keys, external hard disks, and dongles, cannot be connected to simple application servers. |
Service identification codes for Internet content provider (ICP) filings | For simple application servers in regions in the Chinese mainland with a subscription duration of three months or more (including accumulated renewal period), you can apply for a maximum of five service identification codes for ICP filings for each server. |
Images
Limit | Description |
Custom image |
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Cross-account custom image sharing |
For more information, see Share a custom image across accounts. |
Application images or OS images | Some images have pre-installed software in the |
Release of custom images | If a simple application server is released when it expires, the custom images that are created based on the server are also released. |
For more information about custom images, see Manage custom images.
Storage
Limit | Description |
Maximum number of system disks on a single simple application server | 1 |
Maximum number of data disks that can be attached to a single simple application server | 1 |
Data disk size | 0 to 16380 GiB |
Data disk mount point |
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Detachment of a data disk | A data disk and its associated server expire at the same time. The data disk is bound to the server and cannot be detached. |
Renewal of data disks | After a data disk is attached to a simple application server, the data disk must be renewed together with the simple application server. |
Snapshots
Limit | Description |
Maximum number of snapshots that can be created for a single simple application server | 3 |
Maximum number of snapshots in an Alibaba Cloud account | The maximum number of snapshots that can be retained in an Alibaba Cloud account is triple the number of simple application servers in the account. The value cannot exceed 15. |
Scheduled snapshots | You can only manually create snapshots. The system cannot create scheduled snapshots. |
Disk roll-back based on a snapshot | If a simple application server is reset, the snapshots that are created before the server is reset are retained, but the snapshots cannot be used to roll back the disks of the server. |
Release of snapshots | If a simple application server is released when it expires, the snapshots that are created based on the server are also released. |
Snapshot download or export | You cannot download or export created snapshots. |
For more information about snapshots, see Manage snapshots.
Network
Limit | Description |
Public IP address | By default, each simple application server is assigned a public IP address. You cannot change the public IP address. You cannot retain the public IP address when the corresponding simple application server expires. |
IPv6 address | IPv6 addresses cannot be configured for simple application servers. |
Bandwidth |
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Firewall |
For more information, see Manage firewalls. |
Service interconnection | By default, all simple application servers that belong to the same Alibaba Cloud account in the same region can communicate with each other over virtual private clouds (VPCs). By default, simple application servers cannot communicate with other Alibaba Cloud services in VPCs, such as ECS instances and ApsaraDB services, over VPCs. You can enable the service interconnection feature to implement connectivity between these services. For more information, see Manage service interconnection. |