Re: YAIQ - Yet another ignorant question: multiple LPARs.

John

The i is an object-based system. I don't think mainframes are like this. Nor are Windows or Unix. The beauty of it is, each object can have only certain things done to it. There are *PGM objects, but you are not able to append anything to them, as you can with .exe files in Windows. So you are protected from many ways of harming the system. Likewise, *FILE objects, of which there are several subtypes, have things you can do only with files - you can add data, you can read data. But you cannot RUN a *FILE - no executable code that we deal with.

Also, every object contains within it the security stuff, so that is not kept in tables, either.

I think I sent you a link to a concepts page - one on porting to the i - it will help you with a lot of this, I think.

You can, through DRDA, execute a program on one system against data on another - there is probably something similar on mainframes. That exposure, however, to a production, needs to be severely controlled and audited.

Another thing about the i - there is so much logging and auditing available to you. My understanding years ago was, system analysts had to write all manner of that stuff on a mainframe - not on the i.

HTH
Vern

McKown, John wrote:

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Dan Kimmel
Sent: Wednesday, December 10, 2008 10:47 AM
To: Midrange Systems Technical Discussion
Subject: RE: YAIQ - Yet another ignorant question: multiple LPARs.


Use remote database directory to use the database on another LPAR. This
is DRDA under the covers. You can also connect to DB2 on your mainframe
from your i. When using LPARs, the "ethernet" (or SDLC if you prefer) is
through the system backplane, so it is very fast.

Ah. Thanks. I think that I have a "conceptual problem". So, everything
on the i is contained in a DB2 database, correct? Therefore it can be
shared via "remote database directory" aka DRDA. I'm not used to
thinking of programs as being stored in a database. Another conceptual
hurdle to get over.

The "backplane ethernet" sounds very similar to the z series
"hipersocket".
--
John McKown Systems Engineer IV
IT

Administrative Services Group

HealthMarkets(r)
Administrative Services Group
9151 Boulevard 26 * N. Richland Hills * TX 76010
(817) 255-3225 phone * (817)-961-6183 cell
john.mckown@xxxxxxxxxxxxxxxxx * www.HealthMarkets.com

Confidentiality Notice: This e-mail message, including any attachments,
is for the sole use of the intended recipient(s) and may contain
confidential or proprietary information. Any unauthorized review, use,
disclosure or distribution is prohibited. If you are not the intended
recipient, please contact the sender by reply e-mail and destroy all
copies of the original message.