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 Of course, it's just a wee bit out of date now!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 The code I have is out of date also, but your query here prompted me to create a new version.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
