ML wrote:
I have recently been looking on dice.com (and other sites) and noticed
a striking difference in the number of listings for DB2 DBAs for the
OS390 platform. Most of the listings are AIX.
Anyone else notice this? Also, is DB2 on OS390 dying?
--
ML
well, yes and no. some of the replies are along the lines of "z/OS
brings in more money". that was sortta true last time I looked. it is
also true that this is generated from far, far fewer installations.
now, those z/OS installations *tend* to be populated with hoary COBOL
programmers who use DB2 as a file surrogate, and where the "DBA" was/is
one of said COBOL programmers. this is absolutely true in the financial
services industry, where I currently toil. it's worth noting that DB2
is about the only database that is allowed in the mainframe world. once
IBM has gotten all of those 1970s VSAM systems switched over, there
won't be much left to do. I never seen any info on how much *new*
development is happening on Z machines running z/OS, either from IBM or
the usual sources. doesn't surprise me.
so, what a DBA in the z/OS world tends to do is back up the "files" then
run a "job". not much more. stored procedures, functions,
normalization, database design (all that database stuff; woe betide the
DBA that tries to enforce naming requirements on a herd of COBOL
programmers): nope.
in the *nix world, on the other hand, database design and the like is
more frequent. sometimes referred to as green fields work.
in the end, it depends on what you want to do as a DBA: back up files
and run jobs, or take an active part in databased systems development.