This topic describes the regions where Simple Application Server is available and network connectivity of Simple Application Server. You can select a region to deploy your simple application server based on your business requirements to ensure fast and stable network access.
Regions
Regions are geographical areas where data centers are deployed. After a resource is created, you cannot change the region to which the resource belongs. Simple Application Server is available in the following regions:
China (Hong Kong), Singapore, Philippines (Manila), Thailand (Bangkok), Indonesia (Jakarta), Malaysia (Kuala Lumpur), India (Mumbai), Japan (Tokyo), US (Virginia), US (Silicon Valley), Germany (Frankfurt), Australia (Sydney), and UK (London)
Network connectivity
Internet
To ensure fast and stable access to your websites, we recommend that you select data centers that are closest to the regions where your business and users are located
NoteThe bandwidth provided in the regions outside the Chinese mainland takes effect for the users in the regions. If your business resides in the Chinese mainland, we recommend that you do not select the regions outside the Chinese mainland because high latency may occur if you select the regions.
For users in Hong Kong and Southeast Asia, you can select regions such as China (Hong Kong), Singapore, Malaysia (Kuala Lumpur), and Indonesia (Jakarta).
For users in Americas, you can select the US (Virginia) and US (Silicon Valley) regions.
For users in Japan and Korea, you can select the Japan (Tokyo) region.
For users in Europe, you can select the Germany (Frankfurt) and UK (London) regions.
VPC
Simple application servers that belong to the same account and region are automatically assigned to the same virtual private cloud (VPC). These servers can communicate with each other over the VPC, but cannot communicate with the resources of other Alibaba Cloud services deployed in VPCs. Simple application servers in different regions cannot communicate with each other over VPCs. If you want to allow simple application servers to communicate with other Alibaba Cloud services such as Elastic Compute Service (ECS) and ApsaraDB RDS that reside in VPCs, you can configure the service interconnection feature for the simple application servers. For more information, see Manage service interconnection.
NoteBy default, simple application servers and Object Storage Service (OSS) buckets that reside in the same region can communicate with each other over VPCs. You do not need to configure service interconnection in this case. For more information, see Implement service interconnection over the internal endpoint of an OSS resource.