While I do recommend WLM-inits for many types of work, I don't recommend it for all types. While you can use JES commands to limit the max number of inits by Jobclass, WLM-inits work well for similar types of workloads. You can certainly have multiple Service Classes defined for WLM-inits, but you may know specifics about your workloads that WLM does not. Example, if you have some DB2 batch running, and it optimally uses 10 inits, WLM could double it based on the CURRENT state of the system(s). Just because the PI is acceptable, may not mean your DB2 databases can handle 20 or 50 parallel jobs. Also jobs dependent on real tape mounts, or even lengthy HSM recalls, can skew how well WLM-inits work. So, be sure you know your workloads, use both types of inits as appropriate.
zNorman -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Ted MacNEIL Sent: Wednesday, September 15, 2010 Wednesday 4:01 PM To: IBM-MAIN@bama.ua.edu Subject: Re: Initiators >Why not just put them under WLM control, and then the system controls how many you use (up to your set limits)? This is much easier than manually stopping and starting initiators, and it takes the control away from operators who usually do not understand the impact starting too many initiators can have on system performance. It does not take control away. It just moves the control. Operators can still start extra jobs. And, WLM controlled inits don't help in all situations. - I'm a SuperHero with neither powers, nor motivation! Kimota! ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
