Elastic Loadbalance
Based on a specific traffic scheduling algorithm, user access traffic is distributed to multiple cloud hosts on demand, enabling automatic failover, thereby improving the service capabilities and availability of the entire business system.
Advantages
Safe and stable
It provides multi-level high-availability guarantee capabilities such as health check, cluster deployment, and cross-availability zone disaster recovery to improve business availability.
Elastic expansion
Automatically perform elastic scaling based on access traffic, expand the external service capabilities of the application system, achieve reasonable allocation of resources, effectively reduce costs, and improve system flexibility.
Flexible and easy to use
Provides IP dual-stack capabilities and supports load balancing capabilities for IPv4/v6 arbitrary access traffic, including multiple listening protocols, multiple scheduling algorithms, and multiple optional forwarding strategies to improve business flexibility.
Features
High reliability
Clustered deployment supports dual-machine hot backup structure. If the active device fails, it will be seamlessly switched to the backup device without affecting user services; it supports intra-city disaster recovery across availability zones.
Health examination
Regularly check the operation of the back-end cloud server. If an abnormality occurs, the system automatically isolates the abnormal cloud server and automatically forwards the traffic to a cloud server that is running normally to ensure high business availability.
Session persistence
The four-layer protocol supports the session persistence capability through the source IP address; the seven-layer protocol supports the session persistence capability through cookies.
Flexible scheduling
Supports load balancing algorithms for multiple protocols at Layer 4 (TCP, UDP) and Layer 7 (HTTP, HTTPS), including weighted polling, minimum number of connections, source address and other traffic distribution algorithms, as well as multiple forwarding based on domain name and URL Policies can allocate user traffic on demand to improve application system flexibility.
User cases
Flexible resource control
When faced with high-traffic services, users can create cloud hosts on the load balancing backend and distribute traffic to the new cloud hosts to alleviate system pressure during peak periods. When the number of visits is small, unnecessary back-end cloud hosts can be deleted to achieve elastic control of resources and effectively reduce costs.
Ensure business continuity
Deploy multiple cloud host ECS and use it in conjunction with the load balancing SLB. Through the rich health detection algorithm of the load balancing SLB, you can comprehensively detect and check the running status of servers and links from the network layer and application layer, and quickly detect faults. Automatically isolate abnormal instances, complete business switching, and ensure business continuity.
Cross-availability zone same-city disaster recovery
Load balancing supports intelligent scheduling of traffic to back-end servers in multiple availability zones. With the health check function, it can implement a same-city disaster recovery mechanism to meet the high availability requirements of Internet/financial/enterprise customers for business systems.