This topic provides answers to frequently asked questions (FAQ) about Global Accelerator (GA).

What are the use scenarios of GA?

GA can accelerate access to office automation (OA) systems, web applications, and game servers. For more information, see Scenarios.

If I want to accelerate access from clients in mainland China to an application deployed outside mainland China, do I need to obtain an Internet Content Provider (ICP) number?

If the acceleration region is outside mainland China, you do not need to obtain an ICP number.

If the acceleration region is in mainland China, you must obtain an ICP number. To accelerate access from mainland China to an application deployed outside mainland China, you must also purchase a cross-border acceleration bandwidth plan, and use it together with a basic bandwidth plan. For more information, see What is an ICP filing? and ICP filing application overview.

Can a GA instance created with one Alibaba Cloud account accelerate access to a backend service deployed on Alibaba Cloud with a different account?

No.

If your backend service is deployed on Alibaba Cloud, and the Alibaba Cloud account that you use to deploy the backend service is different from the one that you use to activate GA, but you still want to use GA, take note of the following rules when you configure GA:
  • When you activate GA, purchase a basic bandwidth plan that provides enhanced or premium acceleration bandwidth.
  • When you configure the endpoint group, select Off Alibaba Cloud for the Endpoint Service parameter.

Can clients access a backend service by using the CNAME assigned by GA?

No.

A CNAME is used only to identify backend origin servers and does not have an ICP number. Clients cannot directly access the backend service by using the CNAME assigned by GA.

If you want to access the backend service by using the CNAME, you can create a CNAME record on a DNS service platform and point the domain name of the backend service to the CNAME. This way, GA accelerates access to the backend service. For more information, see Accelerate transmission of network traffic destined for a specified domain name.

Does a CNAME assigned by GA support region-specific DNS resolution?

Yes.

You can create a CNAME record on a DNS service platform and point the domain name of a backend service to the CNAME assigned by GA. When a client accesses the backend service by using the domain name, GA resolves the domain name to an accelerated IP address based on the region of the client.

Can GA process TCP and UDP fragments?

No.

Can I use ICMP Ping and TCPing to test the acceleration performance of UDP or TCP listeners?

No.

GA forwards requests at Layer 4 by using TCP or UDP. You cannot use ICMP Ping and TCPing to test the acceleration performance of UDP or TCP listeners.

If you specify UDP as the protocol when you add a listener to GA, you can test the acceleration performance by using UDPing. For more information, see Test the acceleration of UDP traffic.

If you specify TCP as the protocol when you add a listener to GA, you can run cURL commands to test the acceleration performance. For more information, see Test acceleration performance of a TCP listener.

How many GA instances can I create with an Alibaba Cloud account?

Five.

You can submit a ticket to apply for a higher quota.

Can a client that cannot access the Internet use the GA service?

No.

Only clients that can access the Internet can use the GA service.

What is the minimum bandwidth value that I can set a for an acceleration region?

The minimum bandwidth value that you can set a for an acceleration region is 2 Mbit/s.

Does GA have a caching mechanism?

No.