On Thu, 14 Jan 2010 21:15:17 -0600, R Hey <sys...@yahoo.com> wrote: >Hi, > >For a heavy (100+ jobs) nightly batch runs, my client has 6 SC : > >BATHI ,BATMD , BATLO : JES init >BATWLMHI ,BATWLMMD ,BATWLMLO : WLM init > >Used by different job classes. > >Is it better to use: > >1- same IMP for all, & use different Velocity, >or >2- different IMP & Vel, >or ... ? > >My client uses: > >*HI i2 V20 >*MD i3 V10 >*LO i4 V5 > >TIA, >Rez >
You shouldn't mix WLM and JES2 controlled inits in the same service class, so I can see why there are 6 (3 for each). It's a side issue... but if they are still using JES2 inits for a very limited workload / set of jobs, do they really need 3 SCs for it? The less total SC periods active in the LPAR that can manage the workload, the better for WLM. To answer your question: I really can't, only you or your client can. Are they really all the same importance or are some more important (enough) to classify them to a SC with different importance? Importance is the first factor WLM considers when the SC needs to donate or have cycles donated to it (in general, assuming no resource groups). I generally would not recommend using the same importance for all those batch service classes (especially 3). If you were to make 1 or more the same importance, a velocity difference of 5 would be pretty meaningless. A difference of 10 or more should be used. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:mark.zel...@zurichna.com z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
