In its typically quiet yet productive fashion, IBM is readying its next-generation Unix, AIX 5L, for an April release. The name alone indicates that the new version marks a radical departure from the current AIX 4.3.3: the L stands for Linux.
Financial and government IT operations are two of the most likely places to find AIX, followed by health care and e-business. Each of these areas is seeing increased adoption of Linux as a front-line system in IT operations. Linux is no longer just a developer's playpen, and, for starters, AIX 5L's Linux support means Unix shops will have a much easier time attracting developers and support staff, from a far hipper and bigger pool than was previously available.
Other enhancements in AIX 5L, including multipath I/O and NUMA (non-uniform memory access) support, stem from IBM's role in Project Monterey, an effort shared with The Santa Crus Operation (SCO) server software division (now part of Caldera) and Intel to develop an enterprise Unix to run on Intel's perpetually forthcoming Itanium 64-bit processors. When Itanium does ship, it will be the final act that divorces the OS from the server platform, giving enterprises an option to buy servers from vendors that are not their OS vendors. Although Itanium's arrival date continues to be "real soon now", a lot of IBM's work will pay off when AIX 5L ships on IBM's current Power architecture this spring. A number of IBM's RS/6000 machines will support AIX 5L upon release, which should help customers preserve their hardware investments.
Although Sun positions itself as the Unix leader, IBM expects to beat Sun to market with Java 2 Version 1.3 support in the OS and in its plans to offer an improved Workload Manager utility that supports disk I/O management in addition to familiar CPU and memory management features. Solaris currently lacks the ability to manage disk I/O, which can be an important way for IT managers to improve performance of Web-critical applications and allow more effective exploitation of unused server capacity.
As one might expect of a player in banking and government markets, security is a strong point for AIX. The current version, AIX 4.3, was the first 64-bit Unix to achieve TCSEC (Trusted Computer System Evaluation Criteria) C2 certification from the National Security Agency in the United States and the analogous E3F-C2 certification from Germany's Federal Department for Security in Information Technology. We expect AIX 5L will achieve similar ratings. With enhancements from third parties such as Argus and Bull, AIX can also be beefed up to Common Criteria 2.0 B1 certification. These are the kinds of systems that attackers ignore in favour of easier prey.