Re: Port to z/OS or OMVS?
- From: timothy.sipples@xxxxxxxxxxxx (Timothy Sipples)
- Date: 18 Oct 2005 08:09:58 -0700
>I need to port our latest piece of software to the mainframe.
Excellent! Don't forget to also make it available for Linux on zSeries,
to give your customers even more choice. That's *really* trivial if
you're already on Linux (X86, etc.)
>The software
>runs as a server using TCP/IP on Linux/Unix/Windows already. Therefore,
>porting to USS should be fairly painless. What pros and cons would there
be
>porting this server to native z/OS?
These days you can't run z/OS without USS -- it's part and parcel of the
operating system. And there are lots of major middleware products that
use USS, including anything requiring Java. (Java itself runs with USS.)
> + Better performance?
Not really at this point in history. USS has had 20+ years of tuning.
> + Would customers prefer a native version? If so, by how much?
I doubt it. MVS acquired what was then called Open Edition some 20+ years
ago, so the community has had time to get used to it. :-)
> + Do some clients resist/abhor using Unix on the mainframe?
UNIX (POSIX) APIs? Well, then they wouldn't be running z/OS. :-)
> + SMP/E installation of OMVS software supported (and straightforward)
or not?
Absolutely.
> + Other
>I assume that Hipersockets are available to both USS & z/OS to improve
>throughput. If so, is this a scarce/costly resource for customers?
Yes. Hipersockets would apply when your software is (a) communicating
with something outside the z/OS LPAR; (b) that resides on the same
physical system (frame). Examples would include Linux instances running
in other LPARs (with or without z/VM).
Hope that helps!
- - - - -
Timothy F. Sipples
Consulting Enterprise Software Architect
IBM Americas zSeries/z9 Software
Phone: +1 312 529 1612
E-Mail: Timothy.Sipples@xxxxxxxxxx
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