The case I know best is JES2, which now includes tasks JES2AUX and JES2MON. The classic single-task JES2 problem was a hang on one member of a MAS. All other systems complained about access to the checkpoint, while the hung system couldn't even respond to simple commands. It's hung, after all. A second address space--which is designed to depend on minimal resources--is in a better position to analyze and report on the problem, perhaps allowing recovery short of killing the wounded guy.
. . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-543-6132 Office ⇐=== NEW [email protected] -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Lizette Koehler Sent: Tuesday, January 10, 2017 6:26 AM To: [email protected] Subject: (External):Re: General question about address space If I understand your question. Take DFHSM. It can be one address space or multiple Address Spaces (MASH). The benefit to multiple address spaces is you could use WLM to control which one gets more or less priority in the system. So rather than one large DFHSM address space, you could have, as an example, DFHSM1 for Main processing and recalls, DFHSM2 for migrations and backups, DFHSM3 for Recovery. Then use WLM to set the priority on them. So Recalls get a high priority address space. Migrations or backup a low priority address space. Of course if I did not understand your question, then this is probably the wrong answer. Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] > On Behalf Of Peter > Sent: Tuesday, January 10, 2017 6:12 AM > To: [email protected] > Subject: General question about address space > > Hi > > A product having one address space for monitoring various components > like network, Db2, CICS and multiple address space to monitor a single > component > > > Is there any advantage on having multiple address space compared with > sjngle address space ? > > Peter ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
