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Figure 1 illustrates the architecture, showing the key components of the solution as it was tested and benchmarked.
Note: In a customer deployment, an IP load balancer to direct traffic among the ECS nodes is highly recommended. Dell recommends the use of Kemp ECS Connection Manager appliances for this purpose. The IP Load Balancer must support a throughput equivalent to the aggregated throughput of every Vertica Client running on the Dell PowerEdge servers.
During our tests, we used a DNS with round robin (DNS RR) instead of a load balancer. The DNS was responsible for redirecting the traffic across the ECS nodes. The use of DNS RR is not recommended in a production environment; if an ECS node goes down, the DNS will not be aware of the failure.
All testing appliances were contained within a single lab environment, except for the corporate DNS service.
Figure 1. Dell ECS architecture overview