Hi Peter, It's best to start at the source using IBM' Software Pricing website. The calculation for the R4HA is explained here - http://www-03.ibm.com/systems/z/resources/swprice/subcap/corner5.html.
Sub-capacity products are charged based on the highest simultaneous sum of the R4HA MSUs for all LPARs that the product runs in. Said in another way...for each RMF interval, WLM calculates the highest R4HA (as described in the article above) for each LPAR on a CPC and records that to an SMF type 70 record. Most sites, on the second day of the month, collect the SMF type 70 and SMF type 89 records and process them with a program called the Sub-Capacity Reporting Tool (SCRT). SCRT will then calculate the highest R4HA for each LPAR and each hour. From the type 89 records or control statements, SCRT can determine in which LPAR(s) each product runs. SCRT then finds the hour during the month for that combination of LPARs where the sum of the R4HA MSUs is the highest. Thus my earlier sentence that it's the highest simultaneous sum. That sum is then the R4HA for the product. Each product could theoretically have a different R4HA. Note: In most cases, finding the highest sum for a combination of LPARs is done at the CPC level. For Country Multiplex, it's done by finding the highest sum of the LPARs on all CPCs in the multiplex. The MSUs in that hour are used to calculate the price of the product for the entire month. The art of reducing or containing your z/OS software costs is often focused on reducing or capping the R4HA for a product. Some sites have a single R4HA for all LPARs, perhaps at 10 am or maybe at 3 am, and you can try to tune your system to that time frame. Other sites might have a 10 am R4HA for CICS and a 3 am R4HA for DB2, so tuning might be directly at different time periods with different solutions. Here are two articles in a series on software pricing that Alan Murphy and I wrote for Enterprise Executive: 2016 No 2 - http://ourdigitalmags.com/publication/?i=297321#{"issue_id":297321,"numpages":1,"page":47} 2017 No 1 - http://ourdigitalmags.com/publication/?i=384426#"{issue_id:384426,numpages:1,page:28}"; Does that help a little? Best regards, Cheryl Cheryl Watson Watson & Walker, Inc. www.watsonwalker.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Peter Sent: Sunday, September 24, 2017 10:36 PM To: [email protected] Subject: What is 4 Hour rolling average Hi Group Apology for being ignorant here. I am not a capacity analyst but even in the manuals I can't make out the real meaning behind 4 hour rolling average. Could someone please explain me in simple or in layman terms about 4 hour rolling average ? Regards Peter ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
