Sizing the 2005 Worldwide Server Market

A lot of work went into this article at IT Jungle on estimating the installed base of servers. Software companies care a great deal about installed hardware bases. Here's the table of interest:


Worldwide Server Installed Base, Early 2004
X86-X64 Windows NT 2,000,000

X86-X64 Windows 2000 6,200,000

X86-X64 Windows 2003 1,300,000

X86-X64 Linux 2,500,000

X86-X64 NetWare 2,000,000

X86-X64 Unix 2,000,000

X86-X64 Other 500,000

X86 Intel Arch. Total 16,500,000

Sun RISC/Unix 960,000

HP RISC/Unix 240,000

IBM RISC/Unix 310,000

Other RISC/Unix 90,000

Risc/Unix Total 1,600,000

IBM AS/400/iSeries 450,000

IBM Mainframe 20,000

HP VMS 375,000

Other Architectures 150,000

Other Architecture 995,000

TOTAL 19,095,000
Source: IT Jungle

The $64,000,000 question is: are these numbers correct? The answer is "no". They are estimates, and only IBM has a better count. You have my permission to use the numbers above in your market forecast.