Friday, March 14, 2014

Sampling Techdocs - Up to February 2014

Here I am again with an overview of interesting TechDocs documents I came across while browsing through the latest publications. If you're completely unfamiliar to Techdocs, here's an introduction to it.
  • Technical document : DS8000 Host Ports and Installation Sequence
    Here's a nice document on the "DS8000 host adapters installation sequence, port usage, naming conventions and best practices for host connection". Lots of practical tips.
  • Presentation : DS8000 HyperPAV presentation and demonstration
    This is kind of a recap but it still contains some practical tips for people starting with HyperPAV. It's a "presentation that explains HyperPAV and compares HyperPAVs to Dynamic and Static PAVs. There is a demonstration that shows the performance benefits of changing from no PAVs, to Dynamic PAVs and ultimately HyperPAVs."
    • Presentation : zEnterprise z/OS Usage of SMC-R RoCE
      "SMC-R and RoCE provide high throughput with low overhead communications. This paper is developed to detail the SMC-R and RoCE support in z/OS V2.1." This presentation talks about RDMA and SMC R, SMC R Configuration, Management Commands, CP Usage, Switch Ports, SMC R Details, OSA vs. HiperSockets vs. RoCE ... And I can assure you, not one detail is omitted here.
    • White paper : Absolute Capping for zEnterprise LPARs
      Here's an interesting one : "Absolute Capping is a new control which was made available in 2013 supporting the zBC12 and zEC12 GA2 CPCs. It is enabled on zEnterprise via licensed internal code Version 2.12.1 at Driver Level 15 or higher.
      Absolute Capping is available to any LPAR but is of particular interest for non z/OS LPARs such as z/VM and Linux on z that cannot make use of z/OS Workload Manager capacity management functions.
      Unlike traditional LPAR Capping, this enhancement is designed to provide a physical capacity limit enforced as an absolute (versus relative) value that is not affected by changes to the virtual or physical configuration of the system. "
    Well that's it for now. And, as I always say : just check them out !

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