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000-Z01 - IBM System z System Programmer Mastery - BrainDump Information

Vendor Name : IBM
Exam Code : 000-Z01
Exam Name : IBM System z System Programmer Mastery
Questions and Answers : 130 Q & A
Updated On : March 19, 2019
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000-Z01 exam Dumps Source : IBM System z System Programmer Mastery

Test Code : 000-Z01
Test Name : IBM System z System Programmer Mastery
Vendor Name : IBM
Q&A : 130 Real Questions

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IBM IBM System z System

IBM (IBM) Up 3.9% on the grounds that last earnings file: Can It continue? | killexams.com Real Questions and Pass4sure dumps

A month has passed by considering the fact that the final profits report for IBM (IBM). Shares have added about three.9% in that point body, underperforming the S&P 500.

Will the fresh tremendous vogue continue leading up to its subsequent revenue unlock, or is IBM due for a pullback? before we dive into how traders and analysts have reacted as of late, let's take a short appear at the most recent profits document with a purpose to get a far better deal with on the critical drivers.

IBM this fall earnings Beat Estimates, Revenues Decline Y/Y

overseas enterprise Machines Corp delivered fourth-quarter 2018 non-GAAP income of $four.87 per share, which beat the Zacks Consensus Estimate of $4.81 per share. however, profits per share (EPS) decreased 5.9% from the year-in the past quarter. The 12 months-over-year decline in EPS will also be attributed to larger tax cost.

Revenues of $21.76 billion have been pretty much in line with the Zacks Consensus Estimate of $21.seventy four billion and declined three.5% on a yr-over-12 months basis. At regular foreign money (cc), revenues dipped 1%. The yr-over-12 months decline can essentially be attributed to forex fluctuation and headwinds from IBM Z product cycle.

notably, IBM brought up that signings surged 21% on cc foundation to $15.eight billion. services backlog declined 1% year over yr and got here in at $116 billion.

Geographic income particulars

Revenues from Americas had been down 4%, reflecting the headwind from the IBM Z product cycle. besides the fact that children, persevered increase in Latin the usa turned into a good.

Europe, core-East and Africa expanded 2% from the year-in the past quarter exceptionally because of boom in Spain, Germany, Italy and the U.ok.

Asia-Pacific revenues declined 1% on a year-over-12 months groundwork with modest boom in Japan.

Strategic Imperatives growth Continues

Strategic Imperatives (cloud, analytics, mobility and protection) grew 5% at cc from the yr-ago quarter to $eleven.5 billion. except for IBM Z product cycle have an impact on Strategic Imperatives grew 11% year over year.

safety revenues surged 17% (with the exception of IBM Z product cycle affect) and declined three% on cc groundwork. On a trailing 12-month groundwork, Strategic Imperatives revenues were $forty billion, up 9%.

Cloud revenues surged 6% from the 12 months-in the past quarter to $5.7 billion and 19% (excluding IBM Z product cycle influence). The annual run expense for cloud as-a-provider revenues multiplied 21% at cc on a 12 months-over-yr groundwork to $12.2 billion.

Cloud revenues of $19.2 billion on a trailing 12-month foundation accelerated 12% 12 months over year.

Cognitive Revenues Surge

Cognitive solutions’ revenues-external increased 2% 12 months over yr (on cc groundwork) to $5.5 billion. Revenues from Cognitive solutions (together with solutions application and transaction processing) elevated primarily due to growth in options application, including analytics and synthetic intelligence (AI).

Segmental revenues relating Strategic Imperatives and Cloud improved 9% and 5%, respectively. Cloud as-a-service profits annual run rate become $2 billion.

options application contains offerings in strategic verticals like health, domain-selected capabilities like analytics and protection, and IBM’s rising applied sciences of AI and blockchain. The section also contains offerings that address horizontal domains like collaboration, commerce and talent. within the suggested quarter, options application revenues improved 3% yr over year.

IBM mentioned that the mixing of AI into choices like client experience analytics in commerce area helped SaaS signings to grow in double digit in the suggested quarter.

Transaction Processing software contains application that runs mission-vital workloads, leveraging IBM’s hardware structures. Revenues had been up 1% on a year-over-yr foundation.

IBM witnessed increase in business verticals like fitness, key areas of analytics and safety in the quarter. Watson fitness witnessed huge-based boom in Payer, provider, Imaging and lifestyles Sciences domains.

all through the fourth quarter, IBM accelerated partnership with Vodafone group. Per the deal, IBM’s superior hybrid cloud platform, AI, cyber web of issues (“IoT”) capabilities will aid Vodafone company with digital transformation initiatives.

IBM brought up that analytics carried out well within the quarter, driven through facts science offerings and IBM Cloud inner most for facts providing.

security growth turned into pushed via offerings in orchestration, data security and endpoint administration.

Story continues

In blockchain, IBM introduced addition of a couple of new purchasers all through the quarter, which contains “work with smart Dubai on the middle East’s first executive-recommended blockchain platform.” The enterprise additionally unveiled an on-prem providing all over the suggested quarter, the IBM Blockchain Platform for IBM Cloud private. a few new deal wins is additionally assisting IBM to reinforce its foothold in blockchain know-how.

global enterprise capabilities Revenues raise

Revenues from global business capabilities-exterior segment have been $four.three billion, up four% from the yr-in the past quarter (up 6% at cc). The year-over-12 months enhance was essentially as a result of increase across all three business areas particularly consulting, software administration and world system services.

Segmental revenues referring to Strategic Imperatives grew 14%. Cloud follow surged 34%. Cloud as-a-service salary annual run rate was $2.1 billion.

application management revenues elevated 4% from the yr-ago quarter. global system services revenues climbed 5%. moreover, Consulting revenues extended 10% year over 12 months, driven through potent efficiency from IBM’s digital business.

expertise functions & Cloud platforms: Revenues Dip

Revenues from expertise features & Cloud systems-exterior lowered three% from the year-ago quarter (flat at cc) to $8.9 billion. Segmental revenues pertaining to Strategic Imperatives advanced 13%, pushed via hybrid cloud features. Cloud surged 22% from the year-ago quarter. Cloud as-a-service earnings annual run cost become $eight billion.

Integration software increased four% from the year-in the past quarter. all over the reported quarter, greater than 100 companies world wide selected IBM Cloud inner most offering. Infrastructure capabilities revenues had been flat on a 12 months-over-year basis.

Technical help functions revenues decreased 3% from the yr-ago quarter.

energy & z14 power methods Revenues

systems revenues reduced 21% on a yr-over-year basis (down 20% at cc) to $2.6 billion, basically due to have an effect on of the IBM Z product cycle. Segmental revenues touching on Strategic Imperatives plunged 22%, whereas Cloud revenues declined 31%.

IBM Z revenues reduced forty four% year over yr. however, MIPS potential has multiplied round 20%, driven by large-based mostly adoption of the z14 mainframe.

power revenues increased 10% from the yr-in the past quarter. The upside became specially because of Linux and strong adoption across the latest POWER9-based architecture.

all the way through the fourth quarter, IBM accomplished the launch of its subsequent generation POWER9 processors for midrange and excessive-end systems which are designed for handling advanced analytics, cloud environments and information-intensive workloads in AI, HANA, and UNIX markets.

IBM additionally brought new offerings optimizing both hardware and utility for AI. administration believes that products like PowerAI imaginative and prescient and PowerAI commercial enterprise will assist power new consumer adoption.

despite the fact, storage hardware revenues declined due to vulnerable efficiency in the mid-range conclusion, partly offset via amazing boom in All Flash Arrays. IBM stated that pricing drive in the immensely competitive storage market is hurting revenues. The enterprise introduced its new FlashSystems with subsequent generation NVMe know-how all the way through the reported quarter.

operating systems application revenues declined three%, while systems Hardware slumped 23% from the yr-ago quarter.

at last, global Financing (contains financing and used gadget income) revenues diminished 11% year over year and 9% at cc to $402 million.

working particulars

Non-GAAP gross margin remained unchanged from the year-in the past quarter at 49.5%. The gross margin benefited primarily by 190 basis points (bps) enlargement in capabilities margin. youngsters, detrimental mix in IBM Z product cycle utterly offset this enlargement.

operating price declined 5.three% 12 months over yr, due to attention of acquisition synergies and improving operational efficiencies. IBM continues to put money into all of a sudden starting to be fields like hybrid cloud, synthetic intelligence (AI), security and blockchain.

Pre-tax margin from carrying on with operations increased 50 bps on a year-over-12 months foundation to 23.1%.

Cognitive options and global business functions phase pre-tax margins accelerated 290 bps and 520 bps, respectively, on a year-over-yr basis. besides the fact that children, know-how services & Cloud systems phase pre-tax margin shriveled 20 bps.

Non-GAAP operating margins from continuing operations contracted ninety bps and came in at 20.three%.

stability Sheet & money movement details

IBM ended fourth-quarter 2018 with $eleven.ninety nine billion in complete money and marketable securities in comparison with $14.70 billion at the conclusion of third-quarter 2018. total debt (together with existing component) become $forty five.8 billion, down from $46.9 million from the old quarter.

IBM mentioned cash circulation from operations (excluding international Financing receivables) of $7.3 billion and generated free money move of $6.5 billion within the quarter under assessment.

within the mentioned quarter, the enterprise again $3.5 billion to shareholders through dividends and share repurchases. The enterprise again more than $10 billion to shareholders via dividends and share repurchases for the entire fiscal 12 months.

on the end of the 12 months, the company had $3.three billion remaining beneath existing buyback authorization.

Fiscal 2018 Highlights

IBM said fiscal 2018 non-GAAP profits of $13.eighty one per share, where as revenues got here in at $79.6 billion, up 1% each yr over yr.

Revenues from Cognitive options, world business capabilities, technology services & Cloud systems, systems and global Financing got here in at $18.forty eight billion, $sixteen.82 billion, $34.forty six billion, $eight.03 billion and $1.59 billion, respectively.

guidance

IBM expects non-GAAP EPS forecast for 2019 to be at least $13.ninety.

IBM still anticipates 2019 free cash move of $12 billion.

How Have Estimates Been relocating considering that Then?

It turns out, fresh estimates flatlined all through the past month.

VGM ratings

at the present, IBM has a subpar boom score of D, however its Momentum score is doing lots more suitable with a B. Charting a slightly equivalent route, the stock turned into allotted a grade of A on the cost facet, placing it in the excellent quintile for this investment approach.

normal, the inventory has an aggregate VGM ranking of B. in case you aren't focused on one method, this score is the one remember to be drawn to.

Outlook

IBM has a Zacks Rank #3 (dangle). We expect an in-line return from the stock in the following couple of months.

want the newest options from Zacks funding research? nowadays, that you may down load 7 most beneficial stocks for the next 30 Days. click to get this free document foreign business Machines business enterprise (IBM) : Free stock analysis file To read this text on Zacks.com click on here. Zacks funding analysis


analyzing IBM (IBM) & Toshiba (TOSYY) | killexams.com Real Questions and Pass4sure dumps

No influence found, are trying new keyword!comprehensive the form below to get hold of the latest headlines and analysts' techniques for IBM with our free each day e mail e-newsletter ... and transaction processing software that runs mission-crucial sy...

IBM PowerVM: Product Overview and insight | killexams.com Real Questions and Pass4sure dumps

See the entire record of optimum server virtualization utility.

base line:

IBM PowerVM can virtualize AIX, IBM Linux, and IBM i customers running on its vigor server platform. indeed, it is likely one of the most full featured virtulization classes on the market – no surprise, given IBM's deep legacy in the facts middle.

but it may additionally no longer be the least difficult platform to enforce. it will require specialists to install it. as a result, mid-sized and big businesses should still do fine, but SMBs could be choicest to avoid it until they can afford outdoor help. IBM PowerVM is geared exceptionally for modern-day advanced statistics facilities with demanding application workloads.

Product Description:

IBM PowerVM can consolidate varied workloads onto fewer methods, expanding server utilization and decreasing can charge. PowerVM provides a comfy and scalable server virtualization atmosphere for AIX, IBM i and Linux applications constructed upon the RAS facets of the vigour techniques platform. in brief, its hypervisor is reasonably bendy. it may help supply services in the cloud faster by automating deployment of VMs and storage. it will possibly additionally help eliminate downtime via live mobility between servers.

PowerVM 2.2.6 grants business-grade virtualization, proposing the groundwork for cloud computing on IBM vigor systems. it could possibly successfully share resources amongst applications, consolidate diverse workloads, and provide the application mobility in a multi-cloud infrastructure. It is said to increase resource utilization, cut back operating fees, and supply a greater agile ambiance for IBM AIX, IBM i, and IBM Linux functions working on vigor methods.

in the most contemporary free up, IBM has greater tightly integrated PowerVM with the power platform. each POWER9 server comes with POWERVM commercial enterprise version. there is also a typical version in addition to an IBM PowerVM, Linux edition. PowerVM typical version contains the following components:

  • Micro-Partitioning technology
  • N-Port identification Virtualization (NPIV)
  • Partition suspend and resume is supported on POWER8 processor-based mostly servers when the firmware is at stage 8.4.0, or later.
  • PowerVM NovaLink
  • Shared processor pools
  • Shared storage pools
  • Single Root I/O Virtualization (SR-IOV)
  • thin provisioning
  • digital I/O Server (VIOS)
  • virtual network Interface Controller adapters
  • “It has been very reliable with little to no downtime. we've been in a position to stretch our IT bucks because the refresh price on IBM power can run for years. also, we now have been capable of add many extra VMs to physical machines than different systems can run,” referred to an information center supervisor in manufacturing.

    Servers/operating systems:

    AIX, Linux and IBM i customers

    “Our enterprise utilizes VMware and PowerVM. VMware is person pleasant and makes assisting home windows OS more straightforward. PowerVM is moving in that course. PowerVM is greater in for you to prioritize workloads across distinct VMs and be granular to your reservation of cores and digital CPUs. PowerVM permits you to adjust VM characteristics whereas the VM is up and running,” stated a device Admin in oil & gas.

    Implementation:

    PowerVM is a application down load.

    Scalability:

    up to a thousand VMs on a single server.

    Overhead:

    10% to 15%

    administration:

    administration equipment corresponding to Hardware management Console (HMC), integrated Virtualization manager (IVM), and PowerVC support to aggregate and manage components by using a consolidated logical view. you can allocate processors to partitions in increments of 0.01, which permits varied partitions to share the processing vigor of the equipment. When the firmware is at stage 7.6, or later, micropartitions can also be described as small as 0.05 of a processor and can be modified in increments as small as 0.01 of a processor. A maximum of 20 micropartitions can be created per core.

    A operating AIX, Linux, or IBM i logical partition can be suspended together with its operating device and purposes. that you could share reminiscence amongst partitions in a shared reminiscence pool, by using PowerVM energetic reminiscence Sharing. vigour Virtualization performance (PowerVP) is a performance monitoring solution that offers targeted and true-time guidance about virtualized workloads which are working on power techniques. which you can use PowerVP to keep in mind how digital workloads use supplies, to research performance bottlenecks, and to make suggested selections about aid allocation and virtualized machine placement.

    Patching/Backup:

    supplied by using other IBM power tools.

    Migration:

    that you may migrate an lively or inactive AIX, Linux, or IBM i logical partition from one equipment to yet another by using live Partition Mobility.

    safety:

    vigor methods provide a secured server platform. POWER9 hardware and firmware make it much more at ease for cloud deployment with key points for PowerVM servers. Implementation includes:

  • A comfy IPL procedure or comfy Boot which most effective allows for platform manufacturer signed Hostboot and energy Hypervisor (PHYP) linked firmware up via and together with Partition Firmware (PFW) to run on the gadget.
  • A framework to help far flung Attestation of the gadget firmware stack via a hardware trusted Platform Module (TPM).
  • Key Markets:

    Virtualization for AIX, Linux and IBM i purchasers working IBM vigor systems.

    “It could be over engineered for smaller purposes. however, if the infrastructure is in area that you may put it to use to run Linux VMs as well,” spoke of a gadget Admin in Oil & gas

    can charge:

    beginning at $590 per core, free with another IBM items.

    Product

    IBM PowerVM

    structures

    AIX, Linux and IBM i shoppers

    Scalability

    a thousand VMs on a single server

    Overhead %

    10 to 15

    Markets

    Virtualization for AIX, Linux and IBM i shoppers working IBM energy platforms

    can charge

    $590 per core

    Migration

    flow lively or inactive VMs

    Key Differentiator

    appropriate for IBM environments

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    Kenya: IBM Unveils Its 'Master the Mainframe' Contest in Kenya | killexams.com real questions and Pass4sure dumps

    IBM has announced the start of its Master the Mainframe competition in Nairobi, Kenya. The IBM Master the Mainframe Contest, part of the company's System z Academic Initiative, lets students around the world take charge of world-class zEnterprise computing platforms and showcase their talents, while learning sought-after enterprise computing skills.

    The competition, which is open to students from all Kenyan universities, has already attracted entries from students at local universities. As a three-part contest which is taking place in a number of countries, Master the Mainframe serves as an introduction to programming and application development and students require no initial mainframe experience to participate. Through the contest, students learn everything from how to log onto mainframe environments to developing code and problem solving.

    ...

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    IBM extends Mainframe Contest to South Africa | killexams.com real questions and Pass4sure dumps

    February 28, 2014 • Online & Social, Top Stories

    As part of its Academic Initiative, IBM has extended the IBM Master the Mainframe Contest to South African Universities to support and build out skills in next-generation innovations on the mainframe.

     IBM has extended the IBM Master the Mainframe Contest to South African Universities (Image: Wikipedia)

     IBM has extended the IBM Master the Mainframe Contest to South African Universities (Image: Wikipedia)

    IBM has extended the IBM Master the Mainframe Contest to SouthAfrican Universities (Image: Wikipedia)

    The competition lets students use IBM’s world-class Enterprise computing platforms to showcase their talents, while learning sought-after enterprise level computing skills. Winners of the South Africa competition will have the opportunity to compete in the world championships being held in New York later this year.

    As a three-part contest which has now expanded to over 30 countries worldwide, the IBM Master the Mainframe Contest is an introduction to programming and application development, where students require no initial mainframe experience to participate. Through the contest, students learn everything from how to log onto the mainframe to developing code and problem solving. The competition is open to students from all South African universities and has already attracted over 100 entries from students atlocal universities.

    “Mainframes are essentially the backbone of the global economy as well as the life support of most cities infrastructures. As technology evolves, demanding more open, scalable and secure solutions and platforms for cloud, mobile and big data analytics, mainframes are growing in popularity,” said Maurice Blackwood, Executive for Systems , IBM South Africa.

    The fact that 90 percent of the world’s data has been developed over the past few years will mean that advanced systems such as the mainframe continue to be critical tools of success for businesses, especially for those in developing markets such as South Africa.

    The mainframe has been responsible for powering several key advances in technology and business across Africa. In South Africa, lion’s share of the large banks are powered by mainframes with the very first mainframe being installed in 1967. In Senegal, the Ministry of Finance in Senegal brought all of its import and export processes from across the country on-line with System z and is now recovering 30 percent of its Gross National Product, which amounts to two billion Senegalese francs in customs revenue everyday. Through the process, the Ministry increased the performance of its systems by 70 percent, reduced power consumption by 20 percent and cut operating costs by 30 percent.

    “This competition is an incredible opportunity for students to get practical hands on experience with the latest mainframe technologies,” said Prof Alta van der Merwe Head of Department at the University of Pretoria, Department of Informatics in the School of Information Technology, and the President of the South African Institute of Computer Scientists and Information Technologists. “It’s also an opportunity for students to begin to see how critical mainframes are in running modern applications, and supporting big data and cloud environments.”

    Grant Pentelow, Training Manager at FNB says: “The current reality in the corporate environment is that we experience a consistent lack of mainframe skills which have lost momentum to the more favoured web and PC based languages over the last 5 years or more. The IBM competition not only builds skill with those who are not competent with the mainframe but it also builds confidence in those who want to extend their skills and gain experience with integrating various languages.”

    Contestants in the IBM Master the Mainframe competition will gain experience with an array of mainframe technologies, including REXX, Java and Linux on System z, among many others. As students complete each part of the contest, judges evaluate their results and reward those who move on to the next, more difficult phase. The goal of IBM’s Master the Mainframe Contest is to provide students with the mainframe skills necessary to find those unique and exciting jobs.

    Students and teachers can register by the 1st of March 2014 for the IBM Master the Mainframe Contest by clicking on ibm.com/university/contest

    Students who enter the competition also have the opportunity to identify job opportunities supporting mainframe environments. To help in this process, IBM has created Systemzjobs.com. The job board is a resource to link IBM System z clients and partners with students and professionals seeking System z job opportunities and regularly features over 1,000 mainframe-related jobs.

    Since 2005, over 68,000 students have registered to compete in Master the Mainframe Contests around the world.

    Staff writer

    Comments

    comments

    IBMIBM Master the Mainframe ContestSouth AfricaSouth African Universities

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    IBM Db2 Query Optimization Using AI | killexams.com real questions and Pass4sure dumps

    In September 2018, IBM announced a new product, IBM Db2 AI for z/OS. This artificial intelligence engine monitors data access patterns from executing SQL statements, uses machine learning algorithms to decide on optimal patterns and passes this information to the Db2 query optimizer for use by subsequent statements.

    Machine Learning on the IBM z Platform

    In May of 2018, IBM announced version 1.2 of its Machine Learning for z/OS (MLz) product. This is a hybrid zServer and cloud software suite that ingests performance data, analyzes and builds models that represent the health status of various indicators, monitors them over time and provides real-time scoring capabilities.

    Several features of this product offering are aimed at supporting a community of model developers and managers. For example:

  • It supports multiple programming languages such as Python, Scala and R. This allows data modelers and scientists to use a language with which they are familiar;
  • A graphical user interface called the Visual Model Builder guides model developers without requiring highly-technical programming skills;
  • It includes multiple dashboards for monitoring model results and scoring services, as well as controlling the system configuration.
  • This machine learning suite was initially aimed at zServer-based analytics applications. One of the first obvious choices was zSystem performance monitoring and tuning. System Management Facility (SMF) records that are automatically generated by the operating system provide the raw data for system resource consumption such as central processor usage, I/O processing, memory paging and the like. IBM MLz can collect and store these data over time, and build and train models of system behavior, score those behaviors, identify patterns not readily foreseen by humans, develop key performance indicators (KPIs) and then feed the model results back into the system to affect system configuration changes that can improve performance.

    The next step was to implement this suite to analyze Db2 performance data. One solution, called the IBM Db2 IT Operational Analytics (Db2 ITOA) solution template, applies the machine learning technology to Db2 operational data to gain an understanding of Db2 subsystem health. It can dynamically build baselines for key performance indicators, provide a dashboard of these KPIs and give operational staff real-time insight into Db2 operations.

    While general Db2 subsystem performance is an important factor in overall application health and performance, IBM estimates that the DBA support staff spends 25% or more of its time, " ... fighting access path problems which cause performance degradation and service impact.". (See Reference 1).

    AI Comes to Db2

    Consider the plight of modern DBAs in a Db2 environment. In today's IT world they must support one or more big data applications, cloud application and database services, software installation and configuration, Db2 subsystem and application performance tuning, database definition and management, disaster recovery planning, and more. Query tuning has been in existence since the origins of the database, and DBAs are usually tasked with this as well.

    The heart of query path analysis in Db2 is the Optimizer. It accepts SQL statements from applications, verifies authority to access the data, reviews the locations of the objects to be accessed and develops a list of candidate data access paths. These access paths can include indexes, table scans, various table join methods and others. In the data warehouse and big data environments there are usually additional choices available. One of these is the existence of summary tables (sometimes called materialized query tables) that contain pre-summarized or aggregated data, thus allowing Db2 to avoid re-aggregation processing. Another option is the starjoin access path, common in the data warehouse, where the order of table joins is changed for performance reasons.

    The Optimizer then reviews the candidate access paths and chooses the access path, "with the lowest cost." Cost in this context means a weighted summation of resource usage including CPU, I/O, memory and other resources. Finally, the Optimizer takes the lowest cost access path, stores it in memory (and, optionally, in the Db2 Directory) and begins access path execution.

    Big data and data warehouse operations now include software suites that allow the business analyst to use a graphical interface to build and manipulate a miniature data model of the data they wish to analyze. The packages then generate SQL statements based on the users’ requests.

    The Problem for the DBA

    In order to do good analytics on your multiple data stores you need a good understanding of the data requirements, an understanding of the analytical functions and algorithms available and a high-performance data infrastructure. Regrettably, the number and location of data sources is expanding (both in size and in geography), data sizes are growing, and applications continue to proliferate in number and complexity. How should IT managers support this environment, especially with the most experienced and mature staff nearing retirement?

    Understand also that a large part of reducing the total cost of ownership of these systems is to get Db2 applications to run faster and more efficiently. This usually translates into using fewer CPU cycles, doing fewer I/Os and transporting less data across the network. Since it is often difficult to even identify which applications could benefit from performance tuning, one approach is to automate the detection and correction of tuning issues. This is where machine learning and artificial intelligence can be used to great effect.

    Db2 12 for z/OS and Artificial Intelligence

    Db2 version 12 on z/OS uses the machine learning facilities mentioned above to gather and store SQL query text and access path details, as well as actual performance-related historical information such as CPU time used, elapsed times and result set sizes. This offering, described as Db2 AI for z/OS, analyzes and stores the data in machine learning models, with the model analysis results then being scored and made available to the Db2 Optimizer. The next time a scored SQL statement is encountered, the Optimizer can then use the model scoring data as input to its access path choice algorithm.

    The result should be a reduction in CPU consumption as the Optimizer uses model scoring input to choose better access paths. This then lowers CPU costs and speeds application response times. A significant advantage is that using AI software does not require the DBA to have data science skills or deep insights into query tuning methodologies. The Optimizer now chooses the best access paths based not only on SQL query syntax and data distribution statistics but on modelled and scored historical performance.

    This can be particularly important if you store data in multiple places. For example, many analytical queries against big data require concurrent access to certain data warehouse tables. These tables are commonly called dimension tables, and they contain the data elements usually used to control subsetting and aggregation. For example, in a retail environment consider a table called StoreLocation that enumerates every store and its location code. Queries against store sales data may wish to aggregate or summarize sales by Location; hence, the StoreLocation table will be used by some big data queries. In this environment it is common to take the dimension tables and copy them regularly to the big data application. In the IBM world this location is the IBM Db2 Analytics Accelerator (IDAA).

    Now think about SQL queries from both operational applications, data warehouse users and big data business analysts. From Db2's perspective, all these queries are equal, and are forwarded to the Optimizer. However, in the case of operational queries and warehouse queries they should most likely be directed to access the StoreLocation table in the warehouse. On the other hand, the query from the business analyst against big data tables should probably access the copy of the table there. This results in a proliferations of potential access paths, and more work for the Optimizer. Luckily, Db2 AI for z/OS can provide the Optimizer the information it needs to make smart access path selections.

    How It Works

    The sequence of events in Db2 AI for z/OS (See Reference 2) is generally the following:

  • During a bind, rebind, prepare or explain operation, an SQL statement is passed to the Optimizer;
  • The Optimizer chooses the data access path; as the choice is made, Db2 AI captures the SQL syntax, access path choice and query performance statistics (CPU used, etc.) and passes it to a "learning task";
  • The learning task, which can be executed on a zIIP processor (a non-general-purpose CPU core that does not factor into software licensing charges), interfaces with the machine learning software (MLz Model Services) to store this information in a model;
  • As the amount of data in each model grows, the MLz Scoring Service (which also can be executed on a zIIP processor) analyzes the model data and scores the behavior;
  • During the next bind, rebind, prepare or explain, the Optimizer now has access to the scoring for SQL models, and makes appropriate changes to access path choices.
  • There are also various user interfaces that give the administrator visibility to the status of the accumulated SQL statement performance data and model scoring.

    Summary

    IBM's machine learning for zOS (MLz) offering is being used to great effect in Db2 version 12 to improve the performance of analytical queries as well as operational queries and their associated applications. This requires management attention, as you must verify that your business is prepared to consume these ML and AI conclusions. How will you measure the costs and benefits of using machine learning? Which IT support staff must be tasked to reviewing the result of model scoring, and perhaps approving (or overriding) the results? How will you review and justify the assumptions that the software makes about access path choices?

    In other words, how well do you know your data, its distribution, its integrity and your current and proposed access paths? This will determine where the DBAs spend their time in supporting analytics and operational application performance.

    # # #

    Reference 1

    John Campbell, IBM Db2 Distinguished EngineerFrom "IBM Db2 AI for z/OS: Boost IBM Db2 application performance with machine learning"https://www.worldofdb2.com/events/ibm-db2-ai-for-z-os-boost-ibm-db2-application-performance-with-ma

    Reference 2

    Db2 AI for z/OShttps://www.ibm.com/support/knowledgecenter/en/SSGKMA_1.1.0/src/ai/ai_home.html

    See all articles by Lockwood Lyon



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