goal-based initiator mngmnt http://www- 03.ibm.com/servers/resources/servers_eserver_zseries_zos_wlm_pdf_cmgbatch _pdf_wlm_goal_based_initiator_management.pdf
says: > When to Continue Using JES-managed Job Classes When the depth of the job class queue is unrelated to the number of initiators servicing the queue, either a discretionary goal or JES-managed initiators should be used. If velocity goals or response time goals are used in cases where a very large number of jobs are released simultaneously, WLM's algorithms will project little incremental value in reallocating resources to help the work and the work may be delayed as a result. In cases where the batch jobs are the only work running, excess CPU and storage resource will still be used to support initiators. See "Critical Path Batch" for other considerations. Of course the next logical question is: how large is 'a large number'? There is no specific magic number, no threshhold, no rule of thumb. Go back instead to the first sentence; the trouble is not from 'large' numbers of jobs, but from divorcing queue delay from the number of initiators. If the initiation approach for a workload amounts to dumping in a whole bunch of work and letting MVS sort through it all using the available capacity, that is not something whose initiation is managable via a response time goal or velocity goal; use a discretionary goal, possibly with a resource group minimum, or use JES-managed initiators to initiate it. ...... Critical Path Batch WLM batch management is not intended to replace job scheduling packages. It does not provide deadline management, critical path analysis, job dependency scheduling, et cetera. Jobs that must be guaranteed immediate initiation once released should be run using JES-managed initiators. > Is this saying that 1- When the major work is heavy BATCH runs, using WLM INIT would result in higher use of CPU/STG, but only if VEL/RESP goals are used? 2- If too many jobs are released at once, use DISC goal, or use JES INIT? Cheers, Rez ---------------------------------------------------------------------- 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
