Consolidation of servers in datacentres through virtualisation
has clear benefits to companies but the benefits are overstated by suppliers,
says an Impact Research report from Info-Tech Research Group.
"In their pitches to customers, suppliers tend to exaggerate the number
of servers that can actually be consolidated which can be misleading
for enterprises looking to invest in this technology," comments Matt
Brudzynski, senior research analyst at Info-Tech Research Group.
"Suppliers are quoting high consolidation ratios of 12 or more virtual
machines per processor, while in reality only about half that, six
virtual machines per processor is the common average at this time."
Info-Tech's Impact Research report, "The Business Case in
Virtualisation", says that the high consolidation rates touted by
suppliers aren't actually happening because customers need to leave
adequate capacity on existing host servers for load-balancing,
emergency back-up, and ensuring adequate data throughput to disc
The company found that the leading providers of X.86 server
consolidation technology are VMware and Microsoft.
"The industry is moving closer to the target of higher consolidation
rates with introduction of quad-core processors that are at the early
stages of deployment in the marketplace," adds Brudzynski.
"These processors provide greater throughput to disc storage and will help
suppliers more effectively deliver on consolidation promises."
Prior to implementing virtualisation, Info-Tech advises IT managers to
do thorough analysis of server utilisation data over the past year, as
well as workload forecasting and future performance modelling to ensure
the right technology choices are made to achieve desired consolidation,