Introduction

HP Auto Port Aggregation is a software product that creates link aggregates, often called “trunks,” which provide a logical grouping of two or more physical ports into a single “fat pipe.” Two primary features are automatic link failure detection and recovery as well as support for load balancing of network traffic across all of the links in the aggregation. This enables you to build large bandwidth logical links into the server that are highly available and completely transparent to the client and server applications.

This white paper presents the exceptional performance and scalability testing results for the HP Auto Port Aggregation (HP APA) product. It also provides system setup and configuration recommendations to help you achieve similar results to suit your business needs.

Executive Summary

The HP APA product, when set up and used in the configurations described in this white paper, consistently provided sustained link rate performance for various workloads with two, four, and eight Gigabit Ethernet ports in a single link aggregate.

The exceptional performance results presented in this paper were measured on a 16-processor HP Integrity rx8620 server running HP-UX 11i v2 and other software performance and scalability enhancements to the networking stack. The high-performance HP ProCurve 3400cl-24G switch has the switching capacity needed to sustain the heavy loads generated by these tests.

The following figure shows the sustained link rate throughput of three different link aggregates under a unidirectional workload. Throughput is a measure of how well programs run with a specific workload and how quickly the programs can service user requests.

Percentage of Individual Port Throughput

100%

100%

99%

100%

 

 

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%

2-port Gigabit Aggregation

4-port Gigabit Aggregation

8-port Gigabit Aggregation

You can expect to see similar results on other HP servers running HP-UX, including those running HP-UX 11i v1 with the corresponding performance and scalability enhancements to the networking stack.

NOTE In this paper, the unidirectional link rate of a single Gigabit port is 948 Mb/s. When multiple Gigabit ports are mentioned, the unidirectional link rate is taken as n*948 Mb/s, where n is the number of unaggregated individual Gigabit Ethernet ports used in the comparison.

Introduction 7

Page 7
Image 7
HP UX Auto Port Aggregation (APA) Software manual Introduction, Executive Summary