Stream: zP&C
Time: 16:00 - 17:00
Historically most installations running full speed 7xx processor models have tended to stay with 7xx models when upgrading their CPCs to a newer generation. But with growing recognition of the major role processor cache efficiency plays in delivered capacity and aided by several well-publicized success stories, many sites today are giving serious consideration to whether there might be a place for sub-capacity models in their configurations. The legitimacy of this approach was reinforced earlier this year during the SHARE Performance Hot Topics session in Atlanta when Brad Snyder from the IBM Washington Systems Center also advocated for a growing role for sub-capacity models. There are indeed numerous stories of customers moving to a lower speed range (z14 7xx to z16 6xx, for example) and achieving efficiencies that significantly exceeded a lateral migration. But since IBM’s primary zPCR processor capacity planning tool has a stated design objective to only model upgrades to newer generations within the same speed range (e.g.,. 7xx to 7xx, 5xx to 5xx), how do you evaluate whether moving to a lower speed range would be advantageous for your workloads? In this session, Frank and Todd will discuss the attributes that they use to evaluate such upgrades.
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Frank is the editor of Cheryl Watson's Tuning Letter, and also consults on sysplex, availability, and performance issues, and teaches software pricing workshops with Cheryl. Prior to joining Watson & Walker in 2014, Frank worked in the IBM Redbooks organization, where he was responsible for sysplex Redbooks and ITSO workshops.
Todd Havekost has over 40 years of IT experience with a primary focus on system and subsystem performance across the IBM Z platform. He joined IntelliMagic in 2016 after experiencing first-hand as a customer the visibility IntelliMagic Vision provides into SMF data, and now spends his days helping customers derive great value from their own SMF data to improve availability and performance. Todd is a highly-regarded industry speaker and has given award winning presentations at events such as SHARE and CMG.
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