At the same time, companies that support the chip are rolling out programs aimed at making it easier to port applications onto Itanium, and gearing up marketing pushes to highlight Linux-on-Itanium as an alternative to Unix on RISC platforms.
However, some industry observers arent sold on the idea, saying that future growth the platform will occur on Windows rather than Linux, particularly as Itanium pushes its way into high-end workloads like business intelligence and databases.
The lower-end applications will run on x86-based systems powered by Intels Xeon or Advanced Micro Devices Opteron chips, observers said.
"We still expect Linux to be the fastest-growing operating system over the next two years," said Joseph Gonzalez, an analyst with Gartner, based in Stamford, Conn. "On the Itanium side, we really dont foresee strong growth during that time. Although it debuted with a lot of hype and fanfare, Itanium hasnt really moved into a commanding role in the server market."
However, representatives from the ISA (Itanium Solutions Alliance) and Itanium stalwarts such as Intel and Hewlett-Packard have said Itanium is an attractive landing place for businesses looking to migrate their high-end Unix workloads to a standard platform. In addition, Linux is one of the technologies common to all these companies.
"Linux is very important to the ISA because Linux is one of the open operating systems that all members of ISA share," said Mike Mitsch, general manager of alliances for NEC Solutions America, headquartered in Melville, N.Y.
Intel, of Santa Clara, Calif., and the ISA, a consortium of hardware and software vendors formed last fall and charged with growing Itaniums market, have positioned the 64-bit chip as a high-end RISC-replacement technology and mainframe alternative.
Poor early performance, product delays and the continued development of x86 chips—in particular Xeon and Opteron—have hobbled Itanium, however. HP currently is the only major hardware vendor offering a wide range of Itanium-powered systems, though a growing number of second-tier OEMs, such as NEC, Fujitsu Computer Systems and Unisys, are betting much of their futures on the architecture.
As indications of the growing popularity of Linux on Itanium, supporters point to the recent Gelato ICE (Itanium Conference & Expo) meeting, which specifically dealt with running Linux on Itanium, and the upcoming release by Intel of "Montecito," the first dual-core Itanium chip that—combined with the Linux 2.6 kernel—will enable users to scale their Linux deployments.
In addition, the ISA is using developer events and global solution centers to entice Linux developers and users to bring their applications to Itanium.
"Itanium brings open standards to the high end of the server market that traditionally has been the domain of costly, proprietary systems," said Rammohan Peddibhotla, director of Intels Open Source Technology Center. "Linux is an important element of these open standards, providing customers with greater choice for their platform solutions. As Linux matures, we see more and more solutions being deployed on the platform."
Peddibhotla pointed to recent enhancements to the Linux kernel for Itanium, including memory error recovery—enabling Linux to kill an affected process if a certain memory error occurs in a user-mode page rather than crashing the whole system—CPU hot-plug, and patches from Intel and HP related to Montecito support.
Intel also is working with the open-source community to bring support for Xen—the open-source virtualization hypervisor—to Itanium, and working with Linux distributors like Red Hat and Novell to ensure that their products support the latest Itanium features.
Montecito will offer Intels on-chip virtualization technology, and Xen will be the base for virtualization options from the Linux providers, Peddibhotla said.
There also are a number of software development products for Linux on Itanium, including compilers, VTune Performance Analyzer, Intel threading and cluster tools and performance libraries.
Officials with HP, of Palo Alto, Calif., said they see Linux as a key part of the multiple operating-system push on the companys Itanium-based Integrity systems. HP is standardizing its high-end servers on the architecture, and can run Linux, Windows and HP-UX—its Unix variant—on the systems.