For application distribution supporting a large number of external users and following a High Availability model, the deployment of load balancing solutions is critical to ensuring capacity requirements are met. The implementation of a load balancing solution works within the High Availability model by polling health status of assigned node clusters and directing connections around dropped hosts. This solution also allows for scalable application infrastructure as additional capacity can be added within existing clusters when required. Logical deployment involves the redundancy model where balancing units are paired in a failover configuration to protect application uptime.
Our standard deployment scenario requires compatibility within High Availability and redundant infrastructure models. Other deployment factors considered during design include vendor selection and security layer availability. Altexxa Group works primarily with the Sophos UTM as an integrated solution offering both the security layer and the load balancing solution within one package. We also work with Cisco specific deployments which utilize a combination of ASA/ACE and backend content management engines. Following the mirror deployment layout under our redundancy model, we utilize High Availability pairs to manage failover requirements for load balancer systems and additional units functioning as the separate security layer. This also requires multiple network paths to internal node clusters as we must eliminate single points of failure under the redundancy model.
Deployment considerations for load balanced environments will include application layer review to determine required protocols as well as security ACL implementation. Standard deployments will often include HTTP/HTTPS balancing across internal clusters and the use of proxy caching services. Requirements for additional protocols such as mail services and user protocols (telecommunications, peer-to-peer) may involve additional balancing outside standard deployed infrastructure. Security considerations should also include network segregation between security ACLs ensuring infrastructure division to provide logical application protection. Further network layer considerations may be involved for distributed content deployments where geographical implications require shortest path content delivery. Diverse protocol and security needs will require vendor selection review to determine deployment needs for load balancing infrastructure.
Copyright 2015 Altexxa GroupAll Rights ReservedBack to the top