CoreLB: uma proposta de balanceamento de carga na rede com Openflow e SNMP

Abstract

Currently, most services balance the load between distinct hosts forwarding connections with a load balance strategy in front. Usually, a dedicated appliance is responsible to performthe balance and may be a fault point and become expensive. The new concepts of computer network architecture with Software-Defined Networking (SND) are changing the network management, absorving specialist services, automating process and building intelligence to statics rules with loads of delivery options. The load balance is a specialized service that can enjoy in a positive way of SDN concepts, with low costs, in a flexible way as per the process needs instead of a plastered process definitions that occurs in many actual models. The OpenFlow protocol definition allow us to use a new solution to address this issue. This work shows a load balance purpose between distinct hosts with the destination change of connections made by the network core. It calls Core-based load balance (CoreLB) because the specialized load balance service move to the network core where the package forwarding is naturally made. This solution intend to use the SNMP protocol to analyse the hosts resources to evaluate server’s load. Using the network forwarding statistics and OS load informations, an efficient solution of load balance, the metodology proved to be efficient with better users’ response times average of 19% than no balanced scenario as well as around 9% better than others load balance strategies and a properly balance consumption of resources from hosts side. This process can be inhered in distinct models, however, this research intend to evaluate Web Services.