Mainframe Facts :-)
It doesn't matter that u r a mainframe professional or not, but the facts are amazing ....... and fact no. 16 is the most amazing!!!!! !!!!!
1. The mainframes hold approximately " 70 % " of the entire data stored in this planet.
2. The latest ones can support over 25,000 users
3. They can support devices spread over 26 miles using fiber optics
4. The size of the "basic" OS is about 14 GB
5. This OS comes in about 57 magnetic tapes, But latest with 4 tapes
6. It takes ATLEAST a month to install and customize a basic mainframe OS configuration.
7. It takes around 3 full days for a mainframe to get up and running
8. Basic configuration for development environment costs 8 crores (hardware + Software)
9. A full team of qualified system operators are always required to be on stand by to ensure successful operation
10. Earlier mainframes were provided with cooling pipes through which cold water was passed to cool the system
(TCS have one in Chennai facility)
11. Recent mainframes have variable speed fans in the cabinet to keep it cool.
12. Have u ever heard of a mainframe system being hacked??? Mainframes are one of the most secure data installations ever
13. You cannot buy the mainframe OS, but u'll have to pay a license to use it. The cost?? cool ...1.5 crores a year.
14. Finally, mainframes today r the most preferred data servers for even the most hi-fi of the organizations!
15. So far no virus has attacked Mainframes
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16. Most of the people working on Mainframe had never seen the mainframe!!!
I learned to program on an ICL 1900 series mainframe and Systime minicomputer in the eighties, and most of these so-called facts are wrong or just stupid. My car has a variable speed fan - why would that be amazing? The most amazing point about mainframes was their ability to perform complex tasks with very few resources, but the author of this list chooses to reverse this, and say they are great because they are massive.
Early viruses were all hosted on mainframes. They were called rabbits, because they replicated themselves, sucking up the system resources.
Hackers didn't gain access to mainframes because most systems were in locked rooms with no networking capabilities. The systems I worked on didn't even have passwords - hardly a great security model.
--nigel
http://qatarjournal.com/~ngourlay/journal/
C'mon Murali... Here's one for you...
An IT company party just begun, and everyone
brought their families with them. Todd, one
of the web developer came to his boss and said,
"Good evening Sir, this is my wife at home dot com."
Cheers!