Linked by Thom Holwerda on Wed 14th Apr 2010 23:51 UTC
IBM This article describes a real-word software port, with examples of how various porting challenges are resolved. If you are a software developer porting software to UNIX, you will find these techniques invaluable in avoiding common pitfalls, resolving bugs, and improving your productivity.
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Some extra information about ibm mainframes
by zubzub on Fri 16th Apr 2010 08:37 UTC
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Some people posting here don't seem very well informed...

the unix layer for z/OS exists for quite a while now (more than 10 years iirc). So it's nothing new. It was developed when ibm though mainframes would become obsolete and everything would be run by (unix) server farms. A unix layer for z/OS would be a good argument to keep the mainframe hardware running.

Some people are comparing mainframes in general with x86 in general and conclude that x86 is faster.
This doesn't make sense at all. The z10 that was releassed in 2008 can have up to 1.5 terabyte of RAM and can have up to 77 quadcore ppc based PUs operating at 4.4Ghz each. Eliminate all the overhead you have with clustered server farms running linux/unix/windows and you have a beast roughly equivalent with 1000 x86 based servers.

Edited 2010-04-16 08:40 UTC

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