Virtual software appliances: A no-brainer or a nonstarter?

Analysts weigh up the new technology delivery platform

Virtual software appliances are applications -- mostly server ones, at this point -- that come to users prepackaged with a thin operating system layer. Essentially virtual machines (VM) created by independent software vendors or systems integrators, rather than IT administrators, virtual software appliances help eliminate potential conflicts with the host hardware's operating system or other applications, reducing crashes and improving security.

Many vendors are enthusiastic about virtual software appliances. They include virtualization players such as rPath and VMware; Linux vendors such as Red Hat, Canonical and Novell; and application vendors such as Oracle.

For instance, Novell is working on a SUSE Studio tool kit that will allow vendors to easily build virtual appliances of their applications on top of a JEOS (just enough operating system) version of SUSE Linux Enterprise 11, according to an interview last week with Markus Rex, Novell's senior vice-president and general manager for open platform solutions.

Market research firm, IDC, also likes the long-term prospects for virtual software appliances. Though it only expects the market to total $US156.3 million this year, IDC predicts $1.2 billion worth of virtual software appliances to ship in 2012. Linux-based appliances will be neck and neck with those that are Windows-based, with each having almost half of the market, and Unix-based appliances running a distant third.

The mainstreaming of server virtualization as well as preconfigured hardware appliances is enabling corporate IT to accept virtual software appliances.

According to the results of an IDC survey released in February, 20 per cent of 302 IT managers at U.S. companies said they were already running some software appliances in production, up threefold from 7 per cent the year before. Midsize companies are deploying them the most, with network management and business applications such as ERP the most popular.

Some IT managers reluctant to buy in

Despite the promising data and the vendor support, virtual software appliances are no sure bet to catch on, according to Gordon Haff, an analyst at Illuminata.

"The idea makes a lot of intellectual sense, but IT folks haven't really bought into it," he said.

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