Showing posts with label HiperDispatch. Show all posts
Showing posts with label HiperDispatch. Show all posts

Thursday, May 26, 2011

Sampling Techdocs : April/May 2011

You know by now I retrieve lots of information from Techdocs. And I have the impression that my harvest for the latest two months is really quite impressive. Just take a look below.
  • White paper : z/OS: Planning Considerations for HiperDispatch Mode
    This paper describes planning considerations for z/OS environments using hiperdispatch. It has been updated to contain information on the benefits of hiperdispatch for the z10 and z196 processors. It also talks about the influence of hiperdispatch on WLM policies, zIIPs and zAAPs ...

  • White paper : IBM HyperSwap Technology
    The document title mentions 'April 2010' but it has been recently updated. I've described the various HyperSwap options in a previous System z newsletter but here's the more elaborate version describing the 4 different HyperSwap options: z/OS Basic HyperSwap, TPC-R HyperSwap, GDPS/PPRC HyperSwap Manager and the full function GDPS/PPRC HyperSwap solution ànd giving you some advice which one might best suit your specific needs. You can also find a presentation summarizing the document over here.

  • Presentation : Websphere advanced skills youtube videos
    Don't let the 'advanced' scare you off : this is a presentation with lots of links to youtube videos presenting a series of videos introducing the viewer to WebSphere Application Server and WAS on z/OS in particular but also giving an overview of the WebSphere Optimized Local Adapters (WOLA) function and an overview of IBM Modern Batch solutions, including WebSphere Compute Grid and integration with Tivoli Workload Scheduler.
  • Presentation : IBM DS8800 Data Migration Scenarios
    Here's an interesting presentation when you want to do (complex) migrations towards DS8000. It outlines the various data migration options with the DS8000 data replication technology like TDMF, Global Copy, z/OS Global Mirror (aka XRC), HyperSwap, useful disk subsystem capabilities like NOCOPY and it also builds some sample scenarios.
  • White paper : Best Practices Upgrading a Coupling Facility
    "Planning for an upgrade of a parallel sysplex to z196 or an upgrade which requires a POR? Need to install maintenance which requires a coupling facility to be reactivated? This paper documents the best practices for installing a new CF, doing a POR of a CEC with a coupling facility image on it and reactivating a coupling facility image".
  • Referral page : WebSphere Application Server z/OS V8
    This page claims to provide "a location for documentation and presentations on WebSphere Application Server for z/OS Version 8. Bookmark this Techdoc and come back for updates and new material as it is produced and made available here". For the moment it provides a technical presentation introducing WAS z/OS V8 (with a reference to some more companion videos on Youtube) and a general PowerPoint introduction to WAS z/OS V8.
  • White paper : Query Where No Query Has Gone Before
    An intriguing title for every Trekkie of course, this one. It's actually about the IBM Smart Analytics Optimizer, but what's interesting is that it describes the various steps for implementing this solution. The paper describes the following steps the team followed : identifying the data warehouses to accelerate, creating an accelerator project, defining the data marts, validating, deploying, and loading the data mart, determining if the query is eligible for acceleration, comparing query execution and refreshing the data mart.
Well that's it for now. As I always say : just check them out !

Wednesday, October 22, 2008

z10 BC (part 2) and z10 EC GA2

In my previous post I discussed the new functionalities for the System z10 BC. As part two of the z10 BC announcement I’m going to comment on some of the features that are announced simultaneously for the z10 BC (‘IBM System z10 Business Class - The smart choice for your business. z can do IT better (ZG08-0806)’) and the z10 EC (‘IBM System z10 Business Class - The smart choice for your business. z can do IT better (ZG08-0843)’. As you’ll notice on the picture below, there’s much more than what I can discuss in one post, so I guess I’ll talk about some of the other features in the near future.

Click on image for larger version in new window

OSA-Express3
With the z10 EC we saw the first announcement of one OSA-Express3 card (10GBe). The range of OSA-Express3 cards has now been largely extended. The cards also have twice as much ports as on the OSA-Express2 cards. This means less CHPIDs, less I/O slots and perhaps less I/O cages (z10 EC) or I/O drawers (z10 BC). An overview :
  • The z10 OSA-Express3 – 10 GbE card is either Long Range (LR) with single mode fiber or Short Range (SR) with multimode fiber. There are 2 ports per card.
  • The z10 OSA-Express3 GbE comes in a Long Wave (LX) and a Short Wave (SX) version. The cards have 4 ports and for the z10 BC there’s a Short Wave (SX) card with 2 ports.
  • The z10 OSA-Express3 1000Base-T card keeps the same functionalities as its predecessor (e.g. OSA Integrated Console Controller). The card has 4 ports and again there’s a 2 port version for the z10 BC.
Z10 High Performance FICON for System z (zHPF)
If you thought that the FICON performance wizards had pulled the last trick out of their sleeves with MIDAW, then think again. They now have come up with z10 High Performance FICON (zHPF) in order to substantially reduce channel overhead once again. It is mainly with small block sizes that the performance is largely improved, in other words mainly for online transaction processing.
It’s only available on the z10 and you have to be at least on z/OS 1.8. There’s a ZHPF=YES/NO parameter in the IECIOSxx member in the SYS1.PARMLIB which has to be activated (default is NO). For the moment it will only work with the DS8000 with R4.1 as it’s the only Control Unit which support this feature for the moment. This DS8000 enhancement was also announced yesterday : IBM System Storage DS8000 series (Machine type 239x) function authorization for zHPF and RMZ resync (ZG08-0908).

Click on image for larger version in new window

Capacity on Demand
‘Capacity on Demand’ has had many enhancements over the last couple of years. The z10 BC offers the same possibilities as the z10 EC : Capacity Backup (CBU), Capacity for Planned Events (CPE) and On/Off Capacity on Demand (OOCoD). Still some new functionalities are introduced for both systems.

There’s a whole Redbook describing every variation, but put simply you can order one or more records for each of these offerings. That way, you can have up to 200 records at your disposal on the Support Element. At that moment the records are said to be ‘staged’. In order to be able to actually use them, you have to install them. You can have a maximum of 8 installed records or tokens. This can e.g. be a combination of CBU tokens for CPs, CBU tokens for zIIPs and one token for On/Off CoD. This way of working was already introduced with the z10 EC, but the number of tokens is extended from 4 to 8.

The major change has to do with the way you are charged for your ‘capacity on demand’. There is no change for CBU and CPE : there’s a hardware charge but no additional software charge. For On/Off CoD you still have hardware as well assoftware charges. So what’s the big difference now ? Well, until now when OOCoD was activated, the charges were calculated according to the number of days it was used. In the new system, this is called ‘Post Paid OOCoD’. Completely new is that you can now also order ‘Pre Paid records’. You buy OOCoD records for a certain capacity in advance e.g. at the same time you order your new z10 BC. When you activate these records afterwards, there’s no payment to be done any more. It’s quite obvious (as opposed to the post-paid records) that these records have no expiration date.

There’s one other new feature I only come across in the z10 BC announcement : you are entitled to one (1) On/Off CoD Test per server with a maximum duration of 24 hours.

Other
From now on you can order Plan Ahead Memory. It means that you order more memory than you’ll be needing at this very moment. You pay immediately for the memory that you are actually using and you partially pay for the ‘plan ahead memory’, which you’re not yet using. When this memory is activated, in one or more steps, afterwards, you pay the rest of the charges for it. This can help you plan for nondisruptive memory upgrades.

The use of PSIFB (Parallel Sysplex using InFiniBand) has also been extended. From now on InfiniBand can also be used as a replacement for ISC-3 links. For the moment it’s exclusively available on the z10 with an unrepeated distance of 10km. Unlike the ISC-3 links, it does not use an I/O slot in the I/O drawer.

The HiperDispatch feature should have little or no impact with the z10 BC.

And there’s one other little sentence I’d like to mention that might perhaps slip your attention when browsing through the announcement. Just like on the z10 BC there's a “62% price reduction on memory for z10 EC when purchased after October 21, 2008, and with a specialty engine for new workloads (…) limited to 16GB per specialty engine".

Availability dates
October 28, 2008 : z10 EC New Features and functions, STP enhancements on z10 EC
January 28, 2009 : STP enhancements on z9 EC and z9 BC
January 28, 2009 : OSA-Express3 1000BASE-T and 10 GbE SR on z10 EC
January 28, 2009 : HCA2-O LR fanout card for Long Reach 1x InfiniBand on z10 EC
First Half 2009 : HMC feature #0090 on z10 EC, z9 EC, z9 BC

Thursday, October 2, 2008

Sampling Techdocs : June - September 2008

Hello, here we go again for another round of interesting material from TechDocs.
  • Tool : Slot Calculator for TS3100, TS3200, TS3310, TS3400 and TS3500(3584)
    I've mentioned the Slot Calculator a couple of times before but now it also includes some other libraries. It already includes the Gen3 cartridges and the new HD tape frames (s24 and s54) too.

  • White Paper : z/OS: Planning Considerations for HiperDispatch Mode
    One of the new functionalities introduced with the z10 EC : with HiperDispatch mode, the intention is to manage work across fewer logical processors. It's important to have some notice of this functionality because all LSPR benchmarks are performed with HiperDispatch mode on. This document describes the functionality, some processing benefits and WLM Policy considerations.

  • Technical Document : Capacity Planning for zAAP and zIIP Specialty Engines
    zIIPs seem to be the talk of the town for the moment. I've just read some nice comments on the DB2-List and the IBM-Main List about zIIP eligibility, on which I hope to come back later. If you want to find out whether the zIIP is something for you, take a look at this and do check if all requirements for getting results are fulfilled at your site.

  • FAQ : Migration from an old version of COBOL to Enterprise COBOL on Z/OS
    I've programmed in COBOL for about 8 years and I can honestly say I still fluently 'speak' COBOL. So when a document like this one shows up, it definitely catches my attention. The question here is : "What is involved in COBOL Migration from an old version of COBOL to Enterprise COBOL on Z/OS?".

  • Flash : Withdrawal of z/OS Function
  • Technical Document : z/OS Positioning Software for the z10 EC Server
  • Presentation : Open Systems Adapter (OSA) Feature Code History
    Three reference documents that contain lots of useful information. Everyone should check out the first two once in a while and certainly when you upgrade your operating system or your hardware model.

  • Technical Document : IBM HyperSwap Technology - z/OS Systems
    I've mentioned other documents about this subject and discussed it in the (then) Dolmen System z Newsletter. This paper gives you an overview of the three variations : GDPS with HyperSwap (the full function), GDPS HyperSwap Manager and z/OS Basic HyperSwap. It describes their distinct functionalities, the prerequisites and it helps you decide which flavour is fit for your environment.

  • Presentation : Monitoring and Managing z/VM and Linux for System z
    How to monitor the architecture, monitor the virtual Linux Performance, performance scenarios and possible solutions, Automated operations requirements, Automated operations scenarios . . .
Well that's it for now. As I always say : just check them out !

Tuesday, April 8, 2008

Sampling Techdocs : February - March 2008

With the z10 announcement and the z/OS 1.10 preview in February, some documents have been reworked and there are of course new documents discussing the new functionalities of the z10. I already discussed one of them into more detail (Basic HyperSwap), but there's of course much more. Here's a selection :

  • Presentation : A System Programmer Productivity Tool Bag
    This is such a useful document I just have to mention it from time to time. "It is designed to point to and describe various information to assist in planning, aid in finding pertinent information, tools which are available to make a systems programmer job a bit easier".

  • Technical document : IBM System Storage DS8000 FlashCopy SE Implementation Considerations and Recommendations
    I know I mentioned this the previous time too, but it has been updated and and it gives a great description of how FlashCopy SE works, where you can use it and where it's better not to use it. Some examples : it is not recommended to use it when data changes more than 20% between two FlashCopies. Do not use it either when you are running update jobs on the same data just after the FlashCopy SE. These circumstances might have a negative influence on your performance.

  • Presentations : WebSphere for z/OS - Version 6.1 Handouts for WBSR6 Wildfire Workshop
    I promised to try and pay some attention to products I'm less familiar with, so here are all the presentations and hands-on labs for the Wildfire Workshop on WebSphere Application Server for z/OS Version 6.1. The topics covered are an overview, Building the Deployment Manager, Standalone Servers and Federation, Data Resources (CICS and DB2), Clustering and Security Implications of Adding Servers, Comparison of HTTP Front-End options for WebSphere Application Server. This should provide a great introduction to the Websphere Application Server and I will surely work my way through it.

  • Tool : Getting Started with zPCR (IBM's Processor Capacity Reference)
    Most people are already familiar with this tool or know at least what it does. It's a great capacity planning tool for System z and since one (or perhaps already two years) it has been made available to the customer. It now provides support for System z10.

  • White Paper : z/OS: Planning Considerations for HiperDispatch Mode
    This was one of the new features that raised many questions when the z10 was introduced as it was not very clear what this was really about. Basically "z/OS workload management and dispatching have been enhanced to take advantage of the System z10 hardware design. A new mode of dispatching called HiperDispatch has been implemented to provide additional processing efficiencies. This White Paper describes planning considerations related to HiperDispatch".
As I always say : just check them out !