Netqos v2 19/12/08 12:56 Page 34
Networks / Telecoms
study found that almost 70 percent of
network managers said they are now
responsible for isolating the cause of
application performance issues,
meaning that their responsibilities now
extend beyond the network
infrastructure.
Clearly, there is a case for
performance-based network
management.
A New Focus for Network
Management: Performance
First
The Performance First paradigm
inverts the traditional, bottom-up
device monitoring approach and
begins with top-down visibility into
overall performance of applications
running over the network.
rapidly and both rely heavily on the performance first when it comes to
quality and consistency of network managing their complex networks. In this approach, infrastructure
delivery. (See Figure 1) By shifting the focus availability and utilisation are no
from fault management—which is longer the sole gauges of network
Legacy applications: largely under control—to health. After all, it makes little sense to
“Chatty” applications designed to run performance-based management, focus 100 percent of network
over local area networks often do not network professionals can improve management efforts on the 0.1
perform well when deployed over the application service delivery and make percent or less of the time there are
WAN. themselves more relevant to the hardware or software infrastructure
Software as a service: business units they serve. failures. Fault management is
More organisations are choosing Over the past two decades, efforts by necessary, but not sufficient.
applications, such as
Salesforce.com, IT organisations and infrastructure
that are delivered over the Internet as vendors have reduced infrastructure A Performance First approach begins
a service, in place of internally hosted, downtime to a minimum. The most by measuring end-user response
client-server applications. important trend in wide area times, then analysing traffic flows and
networking today is the growing need device performance to optimise the
More complex applications to manage application performance. network and troubleshoot problems.
including Service-Oriented
Architectures (SOA): The Case for a New Three Critical Components
Distributed architectures and the use Management Approach of Network Performance
of Web Services as a means to A recent Yankee Group report—aptly Management
develop reusable software for rapid titled “Performance is the New
application delivery and easier Mandate for Network Management”— The Performance First paradigm
maintenance introduce network traffic refers to a study on enterprise requires monitoring three key metrics
between the various application tiers application management. The study (as illustrated in Figure 2):
and infrastructure components. found enterprises report an average
productivity drop of 14 percent when End-to-end Performance
The convergence of increasing WAN experiencing performance Monitoring: To track, measure, and
use with improved device availability degradations in Oracle, SAP, analyse application performance for
is leading network engineers to put PeopleSoft, Siebel, and custom .NET all user transactions from end to end
and J2EE applications. The same for insight into the end user
34 | DATA CENTRE SOLUTIONS |
www.datacentresols.com Winter 2008
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