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Sep 16, 2024 · While there are many similarities between ALB and NLB, both load balancers have significant differences that are important to understand when choosing the right one for your use case. Let’s now take a closer look at these differences to help you decide which one to choose.
- The Components
- The Default
- The Mental Model
- Summary
The components are the same for both the ALB and the NLB. The following figure illustrates the components. 1. The load balancer acts as the entry point into your system. 2. The listener listens for incoming connections 3. The load balancer forwards requests to a target group. 4. The target group consists of one or multiple targets. 5. A target migh...
When in doubt, choose the ALB. There are two main reasons for that: 1. The ALB comes with a lot of built-in features. See the comparison table at the end of the article. 2. The NLB comes with a few rough edges and requires more experience and care. So when deciding between an ALB and an NLB, choose the ALB unless one of the points we discuss next a...
When it comes to AWS, it helps to have a mental model of the provided building blocks. Think about the ALB as a reverse proxy distributing incoming requests among a fleet of virtual machines or containers. Besides that, the ALB provides features like request-based routing, authentication, and security. The ALB is like a fully-managed, scalable, and...
If you have to pick a load balancer, choose the ALB unless you can find a good reason to go with an NLB. Typical reasons for selecting an NLB instead of an ALB are: 1. The workload requires UDP or a non-HTTP protocol. 2. Latency is very crucial, and you have to optimize for every millisecond. 3. Unexpected and huge traffic spikes are likely to happ...
- Andreas Wittig
Jul 10, 2023 · AWS provides three types of load balancers: Application Load Balancer (ALB), Network Load Balancer (NLB), and Classic Load Balancer (CLB). If you need to load balance TCP/UDP traffic or higher performance with low latency, use NLB. But if you are balancing HTTP/HTTPS traffic, consider using ALB, which might be more cost-effective.
Oct 16, 2023 · Use AWS Network Load Balancer (NLB) when: Load balancing needs are at Layer 4 (TCP/UDP) or for non-HTTP protocols. High throughput and low latency are essential. Static IP addresses are required. Routing traffic for containers, microservices, or cross-zone load balancing.
Apr 13, 2018 · An LCU for the Network Load Balancer (NLCU) contains: 800 new non-SSL connections or flows per second; 100,000 active connections or flows (sampled per minute) 2.22 Mbps (which translates to 1GB per hour). Which AWS Load Balancing should you choose? It… depends.
Sep 23, 2024 · An Application Load Balancer (ALB) only works at layer 7 (HTTP). It has a wide range of routing rules for incoming requests based on host name, path, query string parameter, HTTP method, HTTP headers, source IP, or port number. In contrast, ELB only allows routing based on port number.
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Apr 20, 2020 · For TCP/UDP load balancing, use an NLB. An ALB (Application Load Balancer) understands HTTP. If you need to do HTTP-based routing (e.g., routing to different targets depending on the request path) you need to use an ALB.
