I will be taking Dale Smith's version and adding a nice little ISPF Panel around it. And I do think this could be helpful for calculating JES2 CKPT Size for various resources.
Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Jesse 1 Robinson > Sent: Sunday, January 22, 2017 10:59 AM > To: [email protected] > Subject: Re: How to calculate the JES2 Checkpoint and Spool Space > > I for one would be grateful to have your Rexx available on the CBT. Like many > shops, we coast along from one release to next using spool components that > date back to the 90s and the last required cold start. I have no idea whether > we are 10% utilized or 90%. > > . > . > 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 Dale R. Smith > Sent: Sunday, January 22, 2017 9:17 AM > To: [email protected] > Subject: (External):Re: How to calculate the JES2 Checkpoint and Spool Space > > On Tue, 17 Jan 2017 09:02:57 -0700, Lizette Koehler <[email protected]> > wrote: > > >Cross posting to TSO REXX and IBMMAIN > > > >Long ago IBM Created an APAR OY44087 which provided some guidance and > >formula on how to calculate space for the JES2 Ckpt and Spool space. > > > >I am looking to create a REXX/ISPF function or Excel to mimic this process. > >However it is lacking on how some of the newer control blocks, like > >BERTS, would affect this calculation. > > > >Does anyone have any idea how to create a process for generating the > >sizing for > >JES2 based on the newer resources that have been added since OY44087? > > > >I know if I try to increase a resource and there is insufficient space, > >JES2 will prevent the change from occurring and then tell me what it > >needs. I think issuing the command to "see if it works" is not a really > practical method. > >Particularly if you really did not want to change it at that time. > > > >I looking to build a "what-if" tool that could help one validate the > >JES2 environment will be able to handle any resource changes. And if > >it cannot, then what should it be raised to. > > > >Thanks > > > >Lizette Koehler > >statistics: A precise and logical method for stating a half-truth > >inaccurately > > I believe the last time IBM documented any kind of CheckPoint Size Calculation > was in z/OS V1R1.0 JES2 Initialization and Tuning Guide (SA22-7532-00) . Of > course, it's just a wee bit out of date now! I support an inhouse written > product that runs on VM/CMS that displays job information from the JES2 Spool > and CheckPoint. We have had various versions of a VM/CMS REXX program over > the years to calculate the minimum CheckPoint size needed based on several > different JES2 settings. The code I have is out of date also, but your query > here prompted me to create a new version. It took a while to figure out the > various sizes and amounts of the different CheckPoint records. I have tested > it with the settings we have for two different JES2 systems that I have access > to and it seems to calculate the CheckPoint size correctly. It supports the > various CheckPoint Levels thru Z22, (we are currently at Z11). I will email > you the REXX code I have since there doesn't seem to be enough interest to > post it to the list. The code is pure REXX, (VM/CMS not required), so you can > use it as a basis to create an interactive app if you want, by adding a ISPF > front-end, or just modify the variables and run it as is. > > -- > Dale R. > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
