Z/vm mainframes running Linux?

Hello to everyone -

I am just wondering - If running SUSE Linux Server for zSeries and S/390 Mainframes under the GUI (not really recommended) does the looks of the GUI the same as running SUSE as a desktop version?

I would like to see (If anyone can post) a screenshot of SUSE Linux Server's GUI for the Mainframes. People had told me they run it as Runlevel-3. But does the GUI look the same as If I were running SUSE Pro 9.3?

Thanks
js
jslayton01Asked:
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giltjrCommented:
I will have to wait until I get back to work, but why would you think it would look different?

If you are using KDE it is still KDE.  If you are using Gnome, it is still Gnome.  The difference would be based on the level of KDE or Gnome you are using and possibily the capabilities of the X server running on your local computer.

I am not sure, but IIRC SLES 9.0 is the most current release for the mainframe, 9.1 might be ready, bu we are still running 9.0.

Does SUSE on Intel look any different than SUSE on PowerPC (iSeries/pSeries) or Sparc (Sun boxes) or any other OS?

Yes most run it as level 3, because you are not running a local display like you would on other platforms.  You access SUSE on the mainframe using a remote session (telnet or ssh) and using your own X server on your computer (Exceed from Humming Bird, Cygwin X-Windows or any other X server).  Just like you would any other remote Linux (*nux) system.
jslayton01Author Commented:
Dont they have a keyboard and like a mini-monitor hooked up to the Mainframes? I saw plenty of pictures esp. with the HP Proliant racks that have like a laptop-like keyboard and monitor.
jslayton01Author Commented:
So, just to confirm.

If I were to manage or configure a Mainframe running SUSE Linux WITH the GUI look, would be the same as if I were to run it like my desktop version of SUSE?

The menu options in YAST however, would be different though.
giltjrCommented:
I know about IBM and IBM compatiable  mainframe.  There are other companies that sell boxs that they call mainframes (Unisys) and I am not aware of how they work.

IBM Mainframes have what is called a operating system console (which is different from a Hardware Management Console/HMC).  It controled by the OS and is used to see system messages and enter commands to the OS and some subsystems.  You can think of it as an interactive syslog.  You can't logon to an application and run programs interactivly from a system console.  You can start tasks, stop tasks, tell the tasks to change (modify) something on the fly.  On a single mainframe you can create up to 60 logical partitions at the hardware level.  This makes it look like you have 60 mainframes.  You can then run some OS's on each LPAR (z/OS, z/VM, Linux, z/VSE).  If you run z/VM you can then create as many virtual machines as the hardware resources will allow.  You can run z/VM, z/OS, z/VSE and/or Linux under z/VM.

For each z/OS and z/VM (I don't now about z/VSE) you normally need at least one system console, but these days is it not an hard requirement as it used to me.

You can't tell the difference between Linux on a mainframe and Linux on any other platform.  In fact there are some ISP in the world today that offer you your own virtual host.  It looks like you have your own dedicated computer, with your own dedicated processors, memory, NIC's, and disk space, running your own dedicated Linux OS.  However it is really a Linux image running under z/VM.  One ISP replaced 750 Sun boxes with one small 2-way mainframe.  I understand they now have a 4-way mainframe and are up to 1,500 virtual linux images.

Some of the YAST option are different, some are not, just like they would be different if you were running SUSE/SLES on a non-Intel based platform, or even on two Intel based boxes with different hardware.

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