The downsides to server virtualization

Virtualising and consolidating servers can bring multiple benefits to corporate data centres: smaller server footprints, lower heating and cooling costs, less cabling and more efficient management of resources. But there are downsides to consolidating and virtualising servers that companies need to quantify before jumping on the consolidation band wagon.

Software Licensing. Larger servers include more CPUs that each has more processing power. However this can translate into increased software licensing costs. I just spoke to one company that found out too late that their software licensing costs were tied to the number of CPUs and their increased processing power in their new hardware. This surprise offset many of the financial benefits that consolidation was supposed to provide and may even negate them.

Complexity. "One physical server = one application" is an equation that anyone can understand and manage. However consolidation changes the equation to "One physical server = X number of applications and/or operating systems". This makes consolidated environments as complex as having hundreds of servers each supporting its own application. As companies consolidate, they need to ensure that they have processes in place that manage the sharing of server processors, memory and network bandwidth.

Single Point of Failure. No company likes to contemplate the possibility human error. But pull the wrong cable, flip the wrong switch or "fat finger" an entry and suddenly putting all of your eggs in one basket does not seem like such a great idea. Robust disaster recovery plan and server configurations that facilitate fast, easy failovers should be considered mandatory.

Server virtualisation and consolidations clearly bring key cost savings and environmental benefits to corporate data centres. But it is equally important to understand what pitfalls that server virtualisation and consolidations introduce so companies can avoid falling into them.

Jerome Wendt is the president and lead analyst at DCIG Inc. You may read his blogs at www.dciginc.com.

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Jerome Wendt

Computerworld
Show Comments

Cool Tech

Toys for Boys

Family Friendly

Stocking Stuffer

SmartLens - Clip on Phone Camera Lens Set of 3

Learn more >

Christmas Gift Guide

Click for more ›

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Michael Hargreaves

Microsoft Office 365/Dell XPS 15 2-in-1

I’d recommend a Dell XPS 15 2-in-1 and the new Windows 10 to anyone who needs to get serious work done (before you kick back on your couch with your favourite Netflix show.)

Maryellen Rose George

Brother PT-P750W

It’s useful for office tasks as well as pragmatic labelling of equipment and storage – just don’t get too excited and label everything in sight!

Cathy Giles

Brother MFC-L8900CDW

The Brother MFC-L8900CDW is an absolute stand out. I struggle to fault it.

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?