Hi Martin Thank you so much and now I get why '4'
Regards Peter On 25-Sep-2017 12:07 PM, "Martin Packer" <[email protected]> wrote: > If you look in the SMF manual at SMF70LAC it talks about long-term > average. But in practice it DOES mean 4-Hour Rolling Average. > > I believe the figure is generated by the hardware / firmware - from the > z/OS perspective. This is important because I don’t think you can negotiate > with IBM execs to have the meaning change with a simple z/OS PTF. > > Which leads me to a minor “war story”. I was dispatched by one of our > execs - a good few years ago - to help a customer manage their software > bill down. They had been arguing for a SIX Hour Rolling Average metric, > rather than FOUR. I don’t think it takes much of a Math(s) background to > understand why. :-) > > (Almost) needless to say, their request for a change was refused. > > And as to why we have this mechanism it is to smooth out spikes and to get > a (vaguely) repeatable metric that’s defensible all round. > > And, for what it’s worth, I think we’ve been very creative over the years > with software licensing schemes - to be helpful. And remember we have to be > equitable and defensible in doing so. It’s just that implementation - the > customer’s responsibility - sometimes takes some doing. > > Cheers, Martin > > Sent from my iPad > > > On 25 Sep 2017, at 04:50, Peter <[email protected]> wrote: > > > > Hi Cheryl, > > > > Thank you so much > > > > I was just trying to understand the meaning of FOUR hour and why not more > > than that.. > > > > > > I will read it and come back > > > > > > On 25-Sep-2017 8:58 AM, "Cheryl Watson" <[email protected]> wrote: > > > > 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 - https://urldefense.proofpoint.com/v2/url?u=http-3A__ > ourdigitalmags.com_publication_-3Fi-3D297321-23&d=DwIBaQ&c=jf_iaSHvJObTbx- > siA1ZOg&r=BsPGKdq7-Vl8MW2-WOWZjlZ0NwmcFSpQCLphNznBSDQ&m=vfA_ > jMXcR0x4mRLiyaMZmRNTjHJjpbTX92upu96AmN4&s=ZrDm52Ym8VCdi5VHCV8cujOKilGa_ > WGkussy1mDbyMc&e= {"issue_ > > id":297321,"numpages":1,"page":47} > > > > 2017 No 1 - https://urldefense.proofpoint.com/v2/url?u=http-3A__ > ourdigitalmags.com_publication_-3Fi-3D384426-23&d=DwIBaQ&c=jf_iaSHvJObTbx- > siA1ZOg&r=BsPGKdq7-Vl8MW2-WOWZjlZ0NwmcFSpQCLphNznBSDQ&m=vfA_ > jMXcR0x4mRLiyaMZmRNTjHJjpbTX92upu96AmN4&s=l9bH-oprg1GdJVVpTt7lJPdc- > bWBSrEyzDqpK4IjrBE&e= "{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 > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN > > > Unless stated otherwise above: > IBM United Kingdom Limited - Registered in England and Wales with number > 741598. > Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU > > > ---------------------------------------------------------------------- > 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
