Protecting z/OS System Datasets

November 24, 2016 Rui Miguel Feio

It’s important to keep your z/OS system datasets protected. The table below, sets the advised security UACC settings to many of the system datasets. For system data sets that are listed in with a UACC greater than NONE, you might prefer to specify UACC(NONE) and create an access control list […]

RACF Application Identity Mapping (AIM)

November 4, 2016 Rui Miguel Feio

The Application Identity Mapping (AIM) is a RACF feature that provides translation between the RACF userid and the names that other software calls users (e.g. in z/OS Unix System Services the users are called UIDs). AIM has 4 stages: Stage 0 = Pre-conversion database Stage 1 = Builds and maintains, […]

IBM z13 Mainframe – A $1 Billion Investment

October 23, 2016 Rui Miguel Feio

Contrary to popular belief, the mainframe is not an old and obsolete technology. Big companies and government agencies keep using the mainframe because it’s a reliable and powerful platform that has been following the technological evolution. As the video below demonstrates, IBM keeps investing heavily on the development of new […]

The Mainframe Story

October 13, 2016 Rui Miguel Feio

What is a mainframe? Who uses the mainframe? These are some of the most common questions I get on a weekly basis not only through this website, but also at my job. I came across this YouTube video that I think it’s well worth watching by those who are curious […]

Using CLIST with RACF SEARCH command

September 13, 2016 Rui Miguel Feio

Probably not known to many people is the existence or how to use the CLIST parameter of the RACF SEARCH command. Its usefulness however makes it worthwhile for everyone to learn how it works. As you may know, to query the RACF database for the existence of profiles, we rely […]

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