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Introduction

Increasingly, IT organizations are deploying scale-out computing using clusters for these applications:

• High performance computing (HPC)

• Enterprise applications

• Financial services

• Scale-out databases

Scale-out computing uses interconnect technology to combine a large number of stand-alone server

nodes into an integrated and centrally managed system (Figure 1). A cluster infrastructure works best

when built with an interconnect technology that scales easily, reliably, and economically with system

expansion.

Figure 1. System architecture for a sample scale-out HPC cluster

You can now choose from three interconnect technologies to build a cluster:

• Gigabit Ethernet (GbE)

• 10 GbE

• InfiniBand (IB)

Ethernet can be cost-effective for scale-out systems that run applications with little inter-node

communication. 10 GbE meets higher bandwidth requirements than GbE can provide. InfiniBand is

ideal for scale-out environments where applications have extensive inter-node communication and

require very low latency and high bandwidth across the entire fabric.

This technology brief describes InfiniBand as an interconnect technology used in cluster computing. It

describes multiple InfiniBand topologies and multiple configurations for building an HPC cluster. It

also explains how InfiniBand achieves high performance in real world applications.

Admin Switches

Console Switches

External

Network

OST:

Object

Storage

Targets

Interconnect

Service

Computation

Data Management

Visualization

Metadata

Server

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HP Cluster Platform Cabling Tables Papel blanco Pagina 2