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The Mainframe: Still Alive and Kicking

Is it possible to identify those who should migrate and those who should not?

Recently, I was interviewed by Pcon (unfortunately the link points to an Hebrew only site) as part of debriefing on Legacy Systems.

Pcon is an Israeli company investigating IT topics by quoting professional articles and interviewing experts. They publish the results of the investigations including practical recommendations. This post is mainly about topics raised by me during the interview, but not included in the debriefing, which will be published.



What are Legacy Systems?
The term Legacy Systems refers to old application systems and/or veteran technologies still in use. Usually, the term Legacy Systems is associated with:

1. Mainframe Hardware e.g. IBM System z and its Operating Systems or Proprietary Servers and Operating Systems such as HP Alpha and OpenVMS Operating System, IBM AS/400 and OS/400 Operating System.

2. Development and Production Environments, e.g. COBOL, Natural and DBMS systems such as Adabas and IDMS executing on Mainframes or Proprietary Servers infrastructure with proprietary Development and Production Environments .

3. Applications Systems developed more than ten  years ago executing in the infrastructure environments cited above using the IDEs and DBMS Systems cited above.

It is true that often Infrastructure and Applications, cited above are Legacy Systems, however there are also Legacy Systems using other technologies such as Visual Basic version 6 or older, old Java technologies and old Windows Operating Systems or extincted UNIX Operating Systems.

Read the original blog entry...

More Stories By Avi Rosenthal

Ari has over 30 years of experience in IT across a wide variety of technology platforms, including application development, technology selection, application and infrastructure strategies, system design, middleware and transaction management technologies and security.

Positions held include CTO for one of the largest software houses in Israel as well as the CTO position for one of the largest ministries of the Israeli government.

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