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How Global Accelerator works

Anycast edge entry that routes users to the nearest AWS edge and carries traffic over the AWS backbone to your endpoints, improving latency and failover. Billed a fixed hourly fee + a per-GB transfer premium.

The public internet picks a random, congested path from your user to your servers, and it can change minute to minute. Global Accelerator gives users a fixed front door at the nearest AWS edge, then carries their traffic over Amazon's own private backbone, so the long haul is fast and predictable instead of pot luck.

What you will learn

Why does the public internet make long-distance connections slow and inconsistent?
How does entering the AWS backbone early fix that?
How do two static anycast IPs enable near-instant regional failover?
When is Global Accelerator the right tool versus CloudFront?

Get onto the AWS backbone early

Normally a request crosses many independent networks to reach your region, and each hop adds latency and a chance of congestion. Global Accelerator routes the user to the nearest AWS edge location, then sends the traffic over the AWS global backbone to your endpoint.

Static IPs that work for any TCP/UDP app

It hands you two static anycast IP addresses that front your application. Because it operates at the connection (TCP/UDP) level, not just HTTP, it works for game servers, IoT, VoIP, and APIs alike. Those fixed IPs are handy for allowlisting and for clients that cannot follow DNS changes.

⚓ Global multiplayer games, real-time voice/video, financial APIs, and any latency-sensitive app with users spread across continents.

Failover without waiting on DNS

The accelerator continuously health-checks your endpoint groups across regions. If one goes unhealthy, traffic shifts to a healthy region in seconds, and because the front-door IPs never change, clients are not stuck waiting for cached DNS to expire.

Global Accelerator vs CloudFront

Both use the AWS edge, but they do different jobs. CloudFront is a CDN: it caches content close to users and is built for HTTP. Global Accelerator does not cache; it is a network-layer accelerator and failover layer for any protocol, ideal for dynamic, non-cacheable, or non-HTTP traffic.

Flashcards

What is the core trick Global Accelerator uses to cut latency?: It routes users to the nearest AWS edge and carries traffic over the AWS private backbone instead of the unpredictable public internet.
What kinds of traffic can Global Accelerator front?: Any TCP or UDP application (games, VoIP, IoT, APIs), not just HTTP, because it works at the connection layer.
What do the two static anycast IPs give you?: A fixed front door good for allowlisting, plus failover that does not depend on clients refreshing DNS, since the IP never changes.
Why is its regional failover faster than Route 53 failover?: The IP stays constant, so there is no DNS TTL to expire; health checks just steer the same IPs to a healthy region in seconds.
CloudFront or Global Accelerator for dynamic, non-cacheable TCP traffic?: Global Accelerator. CloudFront is a caching CDN for HTTP content; GA is a no-cache network accelerator for any protocol.

Sources

Open the SysPad canvas · Official Global Accelerator documentation