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 a stable network connection.
Regions
Regions are physical locations distributed around the world where Alibaba Cloud hosts data centers of users. When you create a resource, you are required to choose a region in which the resource resides. You cannot change the region after the resource is created. Simple Application Server is available in the following regions:
China (Hong Kong), Singapore, Philippines (Manila), Thailand (Bangkok), Indonesia (Jakarta), Malaysia (Kuala Lumpur), Japan (Tokyo), South Korea (Seoul), US (Virginia), US (Silicon Valley), Germany (Frankfurt), 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.
NoteBandwidths provided in regions outside the Chinese mainland are applicable to users in those 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.
If your business is deployed in Hong Kong or Southeast Asia, you can select a region such as China (Hong Kong), Singapore, Malaysia (Kuala Lumpur), or Indonesia (Jakarta).
If your business is deployed in Americas, you can select the US (Virginia) or US (Silicon Valley) region.
If your business is deployed in Japan or South Korea, you can select the Japan (Tokyo) or South Korea (Seoul) region.
If your business is deployed in Europe, you can select the Germany (Frankfurt) or UK (London) region.
VPC
Simple application servers that belong to the same Alibaba Cloud 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 the same VPC. Simple application servers in different regions cannot communicate with each other over VPCs. If you want a simple application server to communicate with other Alibaba Cloud services such as Elastic Compute Service (ECS) and ApsaraDB over a VPC, you can enable the service interconnection feature for the simple application server. For more information, see Manage service interconnection.
NoteBy default, simple application servers and Object Storage Service (OSS) instances 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.