Community Blog Alibaba Cloud Releases ALB to Accelerate the Delivery of Enterprise Applications

Alibaba Cloud Releases ALB to Accelerate the Delivery of Enterprise Applications

This article reviews the released Alibaba Cloud ALB and its focus on facilitating cost-effective application delivery.

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By Alibaba Cloud_Network

Recently, Zhu Shunmin, a researcher with Alibaba Cloud Network Services, released a variety of new network products at the Apsara Conference 2020. One of the products is the Application Load Balancer (ALB.) Positioned at the application layer, ALB provides superior performance. It is secure, reliable, cloud-native, and out-of-the-box. It supports auto scaling, the Quick UDP Internet Connection (QUIC) protocol, content-based advanced routing, built-in Distributed Denial of Service (DDoS) protection, cloud-native applications, flexible billing, and other product capabilities. It meets many diversified application-layer load requirements.


The Business Scenarios of ALB

When seeing the letters ALB, many people will think of the classic SLB service. Alibaba Cloud Server Load Balancer (SLB) released nearly ten years ago, providing users in various industries with powerful and stable load balancing capabilities. It distributes large amounts of concurrent traffic, prevents Single Point of Failures (SPOFs), and improves service availability. However, as enterprises and Internet businesses develop rapidly, business forms and demands are constantly changing. As a result, traditional load balancing cannot meet the requirements of many business scenarios. There is an urgent need for new product design to meet the requirements for high performance, elasticity, multi-protocol layer-7 forwarding, security, and cloud-native, such as Internet service, big e-commerce promotions, audio and video service, mobile Internet applications, gaming, financial services, and cloud-native applications.


Scenario 1: Big E-Commerce Promotions

E-commerce companies need to carry out big promotions during festivals and major events. Live broadcasting is essential, but the peak traffic volume cannot be estimated before the event. In addition, load sharing must be performed based on the region, time period, and payment process. Although traditional load balancing features unified and flexible scheduling capabilities, it still lacks elasticity, scalability, and high performance. In addition, it cannot achieve real-time elasticity, high concurrency, and large capacity. It cannot complete multi-protocol (HTTP/HTTPS/HOST/URL/Cookie/Http Method) layer-7 forwarding. A new application load balancing (ALB) product is required to meet business needs.

Scenario 2: Live Streaming Service

For various video services, such as long videos, short videos, live videos, and online education, the demand for back-end resources increases. Millions of new connection requests, automatic elastic scaling, and traffic forwarding mechanisms based on user profiles make the current layer-4 SLB unable to fully meet the business development needs. By leveraging the transmission and forwarding capabilities of QUIC, ALB can quickly establish connections, shorten latency, distribute request traffic, and ensure high-traffic services.

Scenario 3: Cloud-Native Applications

In recent years, many businesses have been migrated to the cloud. Cloud vendors provide unified Infrastructure as a Service (IaaS) capabilities and cloud services, which greatly improves resource reuse at the IaaS layer. Users also want to unify systems at higher layers of IaaS. In this way, resources and products can be continuously reused to further reduce the operating costs of enterprises. This is where cloud-native architecture focuses. Based on the cloud-native architecture, ALB meets user requirements in scenarios, such as phased release, traffic simulation, and microservices.


The Benefits of Alibaba Cloud ALB

  • Ultra-High Performance: Based on "Cloud Network Management 2.0" developed by Alibaba Cloud, ALB provides flexible, elastic, and ultra-high-performance instance types. It provisions super layer-7 processing capability so that a single instance can process as high as 1 million Queries Per Second (QPS.)
  • Secure and Reliable: It provides four-level, high-availability, and disaster recovery and is integrated with Anti-DDoS Protection and Web Application Firewall (WAF) to ensure business security.
  • Low Latency: In addition to existing protocols, such as HTTP, HTTPS, and Windows SharePoint Services (WSS), ALB supports QUIC, providing an extremely low-latency experience for video and live streaming users.
  • Cloud-Native: ALB is deeply integrated with Alibaba Cloud Container Service for Kubernetes (ACK), Serverless App Engine (SAE), and Kubernetes (K8S), and uses the official cloud-native Ingress gateway.
  • Personalized Route Forwarding: It provides various advanced forwarding, such as Header, Cookie, and Method, and can better meet the personalized routing forwarding requirements of users.
  • Out-of-the-Box: You can create instances in seconds. ALB delivers an out-of-the-box experience and a complete monitoring and logging service to mine access log data with one click.
  • Flexible Billing: ALB uses the pay-as-you-go billing method and a dual-active disaster recovery mechanism to provide a more stable service experience and higher elasticity.


Network is critical for service migration to the cloud. As more complex enterprise applications are migrated to the cloud, the requirements for cloud networks are becoming higher. The top priority is concurrent high-traffic scheduling and application load balancing capabilities. With the launch of ALB, Alibaba Cloud will focus more on facilitating application delivery and ensuring high elasticity, security, reliability, and cost-effectiveness of applications.

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