“We needed to upgrade our Exchange servers. So rather than upgrade them, we asked about virtualization,” says Glore, chief of implementation and standards for the squadron at Patrick Air Force Base, Fla.
“Without virtualization, we would have had to go out and spend roughly $60,000 on new server hardware,” she explains, adding that now the group’s Exchange servers reside as virtual machines on existing servers.
The Air Force is also spending much less money on hardware refreshes and maintenance at the base, and estimates it will save a total of $180,000 on server costs and the annual electricity and air-conditioning bill.
“With the heat in Florida, saving on HVAC is critical,” says Glenn Exline, manager of the enterprise network group for Computer Sciences Raytheon, the Eastern Range Technical Services Contractor that manages the enterprise and e-mail servers at Patrick.
Another catalyst for e-mail virtualization is lack of floor space at the base, adds Glore. “The server room is only so big, but our data requirements continue to grow,” she says. “The choice is to add more servers or virtualize.”
Leaders Rather Than Followers
For similar reasons, the Navy and Federal Deposit Insurance Corp. are also virtualizing their Exchange servers.
These organizations are truly on the cutting edge, says Gartner analyst Matthew Cain. Many agencies have begun virtualization programs, but few organizations have virtualized Exchange, even among corporations, he says.
But that’s likely to change, Cain predicts, in part because of changes made by Microsoft. Exchange virtualization is now more feasible than it once was.
Although Microsoft supported Exchange 2003 in virtualized mode, it limited support to its own Virtual Server 2005 and did not support VMware, the market leader in virtualization software. But last year’s release of Microsoft’s Hyper-V virtualization technology renewed interest in Exchange virtualization and paved the way for Microsoft to offer support for virtualized VMware servers.
“The popularity of virtualization continues to rise based on the core virtues of greater exploitation of hardware resources, reduced data center footprint, flexibility in system architecture, easier capacity management, faster server deployment, increased server throughput, availability options and improved operational efficiencies,” says Cain. “Microsoft Exchange has not been immune to this trend.”
According to the Navy Marine Corps Intranet Program Office, the Navy Enterprise Architecture and Data Strategy focuses on creating systems that are interoperable and built on a common infrastructure that reduces stovepiped operations across the naval network.
7%: Microsoft Exchange production servers currently virtualized
Virtualization aids that process by ensuring that NMCI’s applications and data resources are used most effectively, allowing applications such as printing, Microsoft Exchange and antivirus software to be moved from one server to another to ensure optimal utilization. While it reduces the amount of hardware required to support the network, virtualization also facilitates future server upgrades by placing each application within its own virtual server, preventing it from impacting other applications when changes are made.
On the Exchange front, Jeff Smith, server manager for EDS, an HP company, which manages the servers for NMCI, says the program now runs 150 virtualized Exchange mailbox servers on 15 machines. The group used to run the Exchange mailbox servers on 150 units. Smith says virtualizing Exchange offers numerous benefits:
• Reduced server replenishment costs. Much like the Air Force squadron, NMCI says it will save on having to buy new servers every four years. At 150 servers, priced at roughly $10,000 per server, that’s at least $1.5 million in cost savings over four years.
• Central management. Now that the e-mail servers are virtualized, there’s less need to send people onsite to refresh or patch the servers. All standard maintenance can be done from a central location using VMware Virtual Center. With fewer servers, there’s also much less maintenance and testing required. Another benefit is that all the servers are HP 580 series so the IT managers don’t have to learn multiple hardware systems.
• Savings on facility space and resources. Between the Exchange servers, gateways and bridgehead servers, the mail operation for NMCI required nearly 200 servers. Virtualizing Exchange lets NMCI reduce its rack space, power and cooling requirements.
FDIC had clearly defined business goals for virtualizing Exchange with VMware, says Sanjeev Purohit, assistant director in the Division of IT.
The agency aims to speed server provisioning, manage demand planning more effectively and add flexibility to its server management, he says.
In the past, when an e-mail server failed at a remote location, sometimes the server would reboot when FDIC’s IT staff in Arlington, Va., tried to bring it up — and sometimes it wouldn’t, which meant they had to wait until someone could physically work on the machine.
And when business activity increased at a regional office and they needed to add another e-mail server, they would have to prepare the server, ship it out and have someone install it on a rack and power it up at the remote location. “Now, we can bump up the processor and memory remotely using VMware without having to go through the purchasing process,” says Purohit. “We can have a new e-mail server up in 30 minutes to an hour.”
Interestingly enough, Purohit says, cost savings or cost avoidance was not a primary goal. He says without question the agency saves on floor space, power and overall energy consumption, and FDIC is always looking for ways to embrace green computing. “One of the real goals was adding flexibility,” he says. “Now, when a regional office gets busy, we can respond more quickly and give them the resources they need.”
So whether it’s cost savings, cost avoidance or simple business sense, virtualizing Microsoft Exchange servers is an option.