The Dell ECS Connection Manager (Kemp) H2 NG is the selected load-balancing appliance used in conjunction with the ECS EX500 solution. This H2 NG is ECS optimized and includes features such as Quality of Service controls and purpose-built ECS S3 traffic steering.
A minimum of two H2 NG (2U) appliances are required per ECS EX500 cluster (VDC) for fault-tolerance. Additional H2 NG load-balancers can be added during cluster expansions so that performance scales in tandem with the added capacity. If a single H2 NG fails, the remaining H2 NG appliance(s) continue to provide load-balancing services and sustained connectivity from clients to ECS.
- (2) 1GbE Ports
- (8) 10GbE Ports (SFP+)
To ensure optimal performance, Teradata recommends connecting each H2 NG to the customer network using (4) 10GbE ports/connections as shown in the following image.
The H2 NG is capable of handling up to 25Gbps of L7 application throughput – enough to reach peak read performance from (2) ECS EX500. However, to support the use case of ECS ex500 as a dense and economical option this reference specification calls for maintaining a 4:1 ratio of ECS EX500 nodes to Kemp H2 NG load balancers. This configuration is constrained by the H2 NG load balancers for a 100% reads ECS workload.