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000-612 DB2 10 DBA for z/OS

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000-612 exam Dumps Source : DB2 10 DBA for z/OS

Test Code : 000-612
Test designation : DB2 10 DBA for z/OS
Vendor designation : IBM
: 134 true Questions

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IBM DB2 10 DBA for

IBM Db2 query Optimization using AI | killexams.com true Questions and Pass4sure dumps

In September 2018, IBM announced a brand unique product, IBM Db2 AI for z/OS. This synthetic intelligence engine displays information access patterns from executing SQL statements, makes utilize of laptop learning algorithms to select most advantageous patterns and passes this guidance to the Db2 question optimizer to be used through subsequent statements.

computing device getting to know on the IBM z Platform

In might too of 2018, IBM announced edition 1.2 of its laptop learning for z/OS (MLz) product. this is a hybrid zServer and cloud application suite that ingests efficiency statistics, analyzes and builds models that characterize the health status of numerous symptoms, screens them over time and offers actual-time scoring capabilities.

a number of elements of this product offering are geared toward aiding a group of mannequin developers and bosses. for example:

  • It supports assorted programming languages similar to Python, Scala and R. This enables statistics modelers and scientists to utilize a language with which they are standard;
  • A graphical consumer interface referred to as the visual model Builder publications model builders devoid of requiring extremely-technical programming competencies;
  • It comprises varied dashboards for monitoring mannequin consequences and scoring services, as well as controlling the system configuration.
  • This machine researching suite changed into originally geared toward zServer-based mostly analytics applications. one of the most first obtrusive decisions changed into zSystem efficiency monitoring and tuning. system management Facility (SMF) statistics that are instantly generated through the operating system provide the uncooked information for device resource consumption corresponding to principal processor utilization, I/O processing, memory paging and the like. IBM MLz can compile and maintain these facts over time, and build and teach models of system habits, score those behaviors, determine patterns now not without problems foreseen by using humans, promote key performance indicators (KPIs) and then feed the mannequin consequences lower back into the apparatus to relish an outcome on gadget configuration alterations that can enlarge efficiency.

    The subsequent step turned into to Put in obligate this suite to research Db2 efficiency data. One solution, referred to as the IBM Db2 IT Operational Analytics (Db2 ITOA) admit template, applies the machine learning expertise to Db2 operational data to profit an understanding of Db2 subsystem fitness. it may well dynamically construct baselines for key performance indications, deliver a dashboard of these KPIs and give operational workforce true-time perception into Db2 operations.

    whereas standard Db2 subsystem performance is a vital aspect in bona fide application fitness and efficiency, IBM estimates that the DBA assist group of workers spends 25% or extra of its time, " ... fighting entry direction complications which trigger efficiency degradation and service relish an impact on.". (See Reference 1).

    AI involves Db2

    consider the plight of modern DBAs in a Db2 environment. In modern day IT world they must aid one or extra expansive data functions, cloud utility and database capabilities, application setting up and configuration, Db2 subsystem and software performance tuning, database definition and management, disaster recuperation planning, and greater. query tuning has been in existence considering that the origins of the database, and DBAs are usually tasked with this as well.

    The coronary heart of query direction analysis in Db2 is the Optimizer. It accepts SQL statements from purposes, verifies authority to access the facts, studies the places of the objects to be accessed and develops an inventory of candidate facts access paths. These entry paths can consist of indexes, table scans, a variety of table unite strategies and others. in the statistics warehouse and massive information environments there are always extra selections purchasable. One of these is the existence of abstract tables (occasionally known as materialized query tables) that contain pre-summarized or aggregated information, for that intuition allowing Db2 to steer lucid of re-aggregation processing. one other option is the starjoin entry route, common in the statistics warehouse, where the order of desk joins is modified for efficiency factors.

    The Optimizer then reports the candidate entry paths and chooses the entry path, "with the lowest cost." cost in this context potential a weighted summation of aid usage including CPU, I/O, reminiscence and different elements. eventually, the Optimizer takes the lowest can saturate entry path, stores it in memory (and, optionally, within the Db2 directory) and begins entry route execution.

    huge facts and information warehouse operations now consist of software suites that enable the trade analyst to utilize a graphical interface to build and manipulate a miniature facts model of the facts they wish to analyze. The programs then generate SQL statements in accordance with the clients’ requests.

    The problem for the DBA

    with a purpose to Do decent analytics on your multiple records shops you exigency a powerful knowing of the statistics requirements, an understanding of the analytical capabilities and algorithms available and a excessive-efficiency statistics infrastructure. alas, the number and site of statistics sources is increasing (each in size and in geography), facts sizes are starting to be, and applications proceed to proliferate in number and complexity. How should IT managers assist this ambiance, above impeccable with probably the most skilled and mature personnel nearing retirement?

    keep in wit additionally that a huge fraction of reducing the whole can saturate of ownership of these systems is to find Db2 purposes to Run faster and extra effectively. This constantly interprets into the usage of fewer CPU cycles, doing fewer I/Os and transporting much less data throughout the network. in view that it's often tricky to even determine which applications could odds from performance tuning, one strategy is to automate the detection and correction of tuning issues. this is where laptop getting to know and artificial intelligence may too be used to incredible effect.

    Db2 12 for z/OS and synthetic Intelligence

    Db2 edition 12 on z/OS uses the desktop studying amenities mentioned above to amass and store SQL query text and entry route details, as well as specific performance-linked ancient tips equivalent to CPU time used, elapsed times and result set sizes. This offering, described as Db2 AI for z/OS, analyzes and retailers the facts in desktop learning fashions, with the mannequin evaluation results then being scored and made obtainable to the Db2 Optimizer. The subsequent time a scored SQL remark is encountered, the Optimizer can then utilize the model scoring data as enter to its entry path option algorithm.

    The outcome may still be a reduction in CPU consumption as the Optimizer makes utilize of mannequin scoring enter to select enhanced access paths. This then lowers CPU costs and speeds utility response times. a major potential is that using AI utility does not require the DBA to relish records science abilities or deep insights into question tuning methodologies. The Optimizer now chooses the example access paths based not best on SQL question syntax and records distribution facts but on modelled and scored used efficiency.

    This may too be above impeccable faultfinding if you save facts in varied places. as an instance, many analytical queries in opposition t expansive facts require concurrent entry to Definite facts warehouse tables. These tables are frequently referred to as dimension tables, and that they comprise the information aspects constantly used to manage subsetting and aggregation. as an example, in a retail atmosphere trust a table referred to as StoreLocation that enumerates every store and its vicinity code. Queries against maintain sales statistics may additionally are looking to compund or summarize income by way of area; therefore, the StoreLocation desk can be used by way of some expansive information queries. in this environment it is common to win the dimension tables and duplicate them regularly to the massive records software. in the IBM world this location is the IBM Db2 Analytics Accelerator (IDAA).

    Now feel about SQL queries from each operational functions, facts warehouse clients and massive facts company analysts. From Db2's perspective, impeccable these queries are equal, and are forwarded to the Optimizer. despite the fact, within the case of operational queries and warehouse queries they should still most likely be directed to entry the StoreLocation desk in the warehouse. on the other hand, the query from the company analyst towards big records tables should likely access the copy of the desk there. This effects in a proliferations of erudition entry paths, and extra work for the Optimizer. thankfully, Db2 AI for z/OS can give the Optimizer the assistance it needs to yield wise entry direction selections.

    the way it Works

    The sequence of routine in Db2 AI for z/OS (See Reference 2) is frequently here:

  • all through a bind, rebind, Put together or explain operation, an SQL commentary is passed to the Optimizer;
  • The Optimizer chooses the records access route; as the option is made, Db2 AI captures the SQL syntax, access direction option and query efficiency facts (CPU used, and so forth.) and passes it to a "researching project";
  • The learning task, which will too be done on a zIIP processor (a non-well-known-aim CPU core that doesn't ingredient into application licensing expenses), interfaces with the desktop discovering application (MLz model services) to shop this suggestions in a mannequin;
  • because the volume of information in each mannequin grows, the MLz Scoring provider (which too can be achieved on a zIIP processor) analyzes the model data and rankings the conduct;
  • during the subsequent bind, rebind, Put together or explain, the Optimizer now has access to the scoring for SQL fashions, and makes applicable alterations to access direction decisions.
  • There are additionally quite a few user interfaces that give the administrator visibility to the fame of the amassed SQL observation performance statistics and mannequin scoring.

    abstract

    IBM's computer getting to know for zOS (MLz) offering is getting used to first rate outcome in Db2 edition 12 to enrich the efficiency of analytical queries in addition to operational queries and their linked purposes. This requires management attention, as you relish to examine that your company is ready to eat these ML and AI conclusions. How will you measure the costs and advantages of using desktop studying? Which IT sheperd personnel must be tasked to reviewing the outcome of mannequin scoring, and perhaps approving (or overriding) the effects? How will you evaluation and warrant the assumptions that the application makes about access route decisions?

    In other words, how neatly did you know your statistics, its distribution, its integrity and your present and proposed access paths? this will investigate the spot the DBAs spend their time in helping analytics and operational utility efficiency.

    # # #

    Reference 1

    John Campbell, IBM Db2 unusual EngineerFrom "IBM Db2 AI for z/OS: enhance IBM Db2 utility efficiency with computer learning"https://www.worldofdb2.com/movements/ibm-db2-ai-for-z-os-boost-ibm-db2-application-performance-with-ma

    Reference 2

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

    See impeccable articles by Lockwood Lyon


    IBM Db2 on Cloud | killexams.com true Questions and Pass4sure dumps

    We evaluation items independently, however they may additionally rate affiliate commissions from purchasing links on this page. terms of use.

    IBM Db2 on Cloud (which starts at $189 per 30 days) is a smartly-designed, thoroughly managed SQL Database-as-a-service (DBaaS) solution with Db2 and Oracle PL/SQL compatibility. information migration techniques and the person interface (UI) are clear, intuitive, and simple to duty for clients of lots of capacity levels. The product is ultimate for developers who wish to create a database with out the suggestions of a database administrator (DBA). it be additionally remarkable for company analysts who exigency to custom construct a database very quickly flat.

    IBM Db2 on Cloud is an exceptional providing that gets a 4.0 rating in this assessment for its sheer ease of use. however, some builders fret at the obstacles in design control, specifically when in comparison with the fierce flexibility of Editor's option MongoDB Atlas in presenting a whole lot controls for builders. IBM Db2 on Cloud too falls in exigency of Editors' option Microsoft Azure SQL Database, which significantly outpaces IBM Db2 on Cloud in the variety of areas—a big deal in some cases when it comes to software performance and compliance with the eu Union (eu)'s conventional statistics protection rules (GDPR). besides the fact that children, IBM Db2 on Cloud offers greater regions than either Amazon Relational Database service or Google BigQuery.

    Pricing mannequin

    clients are funneled into the free Lite tier as a spot to begin. The database then recommends both IBM Db2 on Cloud (SQL) or Cloudant (NoSQL) according to the data. or not it's obvious that the IBM Db2 on Cloud designers realized a whole lot from the Bluemix team because IBM Db2 on Cloud outpaces Rackspace's ObjectRocket (NoSQL) and Amazon Relational Database service (Amazon RDS) in ease of use, notably in statistics migration. each ObjectRocket and AWS RDS are example used with the assist of a DBA, as a minimum prerogative through setup. in contrast, most clients may be capable of spin up a database in IBM Db2 on Cloud with Little fuss, until, of path, the fuss comes from a DBA. Let's puss it. DBaaS regularly quantities to legitimized shadow IT and never each person in it's a fan. it be most useful to examine your enterprise's policy on the utilize of a DBaaS and keep the prescribed protocols.

    The decent information is that there is a free Lite map restricted to 100 megabytes (MB), five connections, and one schema. that you can create several Lite plans in case you desire. No credit card is required even if you utilize one or varied Lite plans. The Lite map is a fab approach to check out the carrier, study greater about working with databases, or Do smaller jobs for free of charge. there may be too a free developer group edition with trade points. Db2 specific-C is free for commercial utilize but is hobbled sort of by way of the lack of some advanced enterprise features.

    The paid Flex map for IBM Db2 on Cloud begins at $189 per thirty days for 1 core, 4 gigabytes (GB) of random access memory (RAM) and a yoke of GB of disk storage. extra cores are $fifty two per core per month. Or $13 per GB of RAM, considering every core has four GB of RAM. additional disk storage is $1 per GB per month. for prime availability, you deserve to double the groundwork plan, cores, and storage can charge. And the ultimate line particular on the invoice is a can saturate of $0.20 per 1 million enter/output (I/O) operations performed.

    you probably relish IBM Db2 on-premises, then you find a huge crop expense the utilize of IBM's "carry Your own License" software. Contact your IBM rep for particulars. you can too find a discount on an IBM Cloud subscription.

    little by little

    After establishing an account on IBM Cloud, disappear to the Menu icon at the upper left-hand facet of the divulge to movement to the dashboard and click on on "Create resource." From there, you're employed via a collection of alternatives for setup. My setup turned into US South place, Db2 on Cloud, and then Flex Plan. It takes 30 seconds to a minute to create a unique illustration.

    IBM Db2 on Cloud has one of the crucial easiest facts-loading strategies in their DBaaS solutions overview roundup. I loaded the information with one click on on the console page, followed by way of a drag and drop of my CSV keep at various facts. an additional click is needed if you opt to yield utilize of Aspera for a excessive-speed load. subsequent is a summon of two schemas or the alternative to create your personal. A schema is a set of tables to organize the statistics. IBM Db2 allows for diverse schemas for each database. For this verify, I chose the IBMADT schema alternative. The apparatus then presents the option to opt for or create a table. next is the define desk stage. keep in the screenshot beneath that formats relish pull-down menus and convenient tips and counsel under the "?" icon by using each and every format classification. When these tasks are accomplished, the data starts uploading.

    as soon as the data is uploaded, click on the Run SQL tab, and you're off and running. you can both enter SQL statements in the SQL editor or load a SQL script from the toolbar. I had no problems with the setup and became up and working with minimal effort. To scale up, I needed most efficient to promote back to the console and click on on the dimensions illustration button. There i will be able to utilize a slidebar to scale up or down. The console automatically displays compute and storage scaling details in addition to an estimated unique charge.

    The Toolbox

    In IBM Db2 on Cloud, you may not find desktop apparatus to set up or tangled cloud configurations to be concerned your way via. yield one click on on options fancy "excessive availability" or "Oracle compatibility mode" and you're well-behaved to move. utilize the cross wizard within the internet console to import a spreadsheet, and IBM Db2 on Cloud will yield assistance for every column that you could spark off or modify. bear in wit this is a relational database so that you can only utilize structured information such as you'll ascertain in a spreadsheet. however that doesn't suggest the information dimension needs to be small. truly, it can too be fairly massive. you probably relish lots of records to migrate, you then relish alternate options to speed the switch. IBM Aspera both compresses your data and makes utilize of the consumer datagram protocol (UDP) to optimize your internet line. UDP makes low-latency, loss-tolerating connections and therefore is a well-behaved deal quicker than the option transmission control protocol (TCP). you are going to find it as a browser plug-in on the web console. this may render two to five times the ordinary pace of your information superhighway connection. For huge, complicated databases, utilize the free IBM raise device.

    in case you had been questioning, IBM joins IBM Db2 on Cloud information with that of IBM Watson Analytics in the identical way as any other information source. IBM has a separate NoSQL cloud-based database known as Cloudant (which I in short outlined past). if you're the usage of IBM Cloud, you then even relish the option of the usage of IBM Compose, where you could select amongst 10 open-source databases: Elasticsearch, JanusGraph, MongoDB, MySQL, PostgreSQL (aka Postgres), RabbitMQ, Redis, ScyllaDB (Apache Cassandra), etcd, and RethinkDB.

    take into account that you simply utilize IBM Db2 on Cloud by way of importing spreadsheets by the utilize of a web console and then Run SQL from there. it really is the point of DBaaS: no configurations mandatory. but, in fact, any third-birthday celebration apparatus you could be the utilize of now with IBM Db2 on Cloud on-premises (equivalent to FalconSQL, SQuirreLSQL, or Toad for IBM Db2) work with IBM Db2 on Cloud. vigor users relish two added options, IBM statistics Server supervisor and IBM information Studio. IBM records Server supervisor monitors and analyzes several IBM Db2 on Cloud cases, on the floor or within the cloud. It additionally supports open-supply databases. IBM facts Studio is DBA laptop application for superior clients, import more often than not DBAs.

    Being in a position to pick the regional spot in your database is essential for two reasons. First, because of laws such because the GDPR, you ought to be sure of where your data resides (even in the cloud), the spot it moves to, and the way it's used. Being in a position to opt for the correct region to your database is vital to protecting compliant. Secondly, the nearer your statistics and app are to at least one one other, the stronger the efficiency (the shorter the lag and different issues). you'll are looking to keep for options to install your app within the identical statistics center as your database, or colocate your database subsequent to your app.

    IBM Db2 gave me 22 region alternatives, together with Amsterdam, Chennai, Dallas, Frankfurt, Hong Kong, London, Melbourne, Milan, Montreal, Norway, Paris, Querétaro (Mexico), San Jose, Sao Paulo, Seoul, Singapore, Sydney, Tokyo, Toronto, and Washington, D.C.

    besides the fact that children, the free Lite edition runs most efficient from IBM's Dallas data core, however the seven-day free trial edition works in any of those 22 areas. extravagant availability plans embrace a a 99.99 percent uptime service-degree settlement (SLA) whereas single-server plans tender a smaller 99.ninety five-p.c uptime SLA. IBM Db2 provides 14 days of every day backups.

    while no device is excellent or proper for every intention, IBM Db2 on Cloud is usually strongly liked via those that exigency extra solace and ease of utilize than is commonly establish in database products or services. however some developers can too find IBM Db2 on Cloud design controls limiting, they are going to attraction to admins for the balance and consistency they deliver to the database normal.

    IBM Db2 on Cloud

    surprising

    bottom line: IBM Db2 on Cloud is a dream Database-as-a-carrier (DBaaS) solution for builders and trade analysts as a result of they could utilize it without the recommendation of a database administrator, even with minimal knowledge.


    IBM iSeries (AS/400) DB2 UDB: proper 10 skilled questions | killexams.com true Questions and Pass4sure dumps

    This tip in the dawn appeared on Search400.com

    Kent Milligan, IBM iSeries/i5 DB2 UDB expert, has been answering Search400.com's member questions for more than 5 years. iSeries users relish requested Kent the identical questions many times. with the object to prevent time, we've got compiled the preempt 10 questions asked about IBM iSeries/i5 DB2 for you. Do you relish a query that's no longer listed prerogative here? exact Kent your IBM DB2 questions.

      table OF CONTENTS  1. counseled index no longer used  2. establishing a default library in IBM DB2  three. CHAR fields vs. VARCHAR  four. The precise dissimilarity between IBM DB2 databases  5. trade the length of an current field  6. having access to an categorical file member using SQL  7. Date formats & creating a desk with SQL  eight. what is the change between DB2/400 and IBM DB2 UDB for the iSeries?  9. entry facts in SQL Server from the iSeries  10. How am i able to inform which indexes are getting used via IBM DB2 and the query optimizer to enlarge performance?

     

    1. counseled index not used

    query: Operation Navigator recommends the usage of an index for SQL performance monitoring. I created the recommended index, nonetheless it feels fancy the device would not utilize it. I locate it peculiar that the index is suggested and then not used. is that this normal?

    Milligan: besides the fact that the question optimizer advises growing an index, it doesn't always resolve to utilize it when creating its entry plan. There are some explanations for this:

    The question optimizer does not impeccable the time recommend the example index. The intuition behind here's that currently, best local alternative is used when picking out what index to recommend -- it does not yet conform with join, order by using, or community by way of columns. due to this fact, after you create that recommended index, it may well now not pick to utilize it, as it remains now not the excellent index. You may exigency to manually intervene -- investigate the query and reckon the be a fraction of, community by, and order by using columns to investigate what the excellent index is and create that index.

    however, it could be recommending that index in order that it may possibly extract stats from the index to further reckon the optimum access components. for example, once the index has been created, it can be the usage of statistics from the index to check that question will recrudesce many rows, for this intuition a desk scan is the inexpensive access method.

    To better maintain in wit the theory of a impeccable index and the way indexes assist the question optimizer with data, that you could examine the white paper Indexing and facts strategies for DB2 for i5/OS.

     

    2. setting up a default library in IBM DB2

    question: How can i install a default library in IBM DB2 in order to no longer trade their SQL statements? truly, they are migrating from IBM B2 UDB home windows Server to the iSeries. in reality, in home windows ambiance, their SQL statements Run neatly and with the SET existing SCHEMAS = "EMPORIUM", they define default schemas in order that they would not relish to explicitly specify it in each of their SQL statements. How can i Do this in an iSeries atmosphere? I deserve to define a library reminiscent of opt for ... FROM MCMLIB.COMMANDES where. can you support me?

    Milligan: It depends on the software programming interface that you're the utilize of. IBM DB2 UDB for iSeries brought support for the SET current SCHEMA statement in V5R2. The iSeries entry ODBC and JDBC drivers aid connection keywords and homes to permit specifying a default library. here's an instance of the ODBC connection key phrase:

    DefaultLibraries=Schema1,Schema2

     

    three. CHAR fields vs. VARCHAR

    question: What are the most efficient drill guidelines with reference to using CHAR fields vs. VARCHAR fields on a IBM DB2 database for the iSeries?

    i'm constructing a unique database for a .web software and i become due to the fact that VARCHAR for some longer fields to maintain storage. I had hoped that the VARCHAR box would too remove the trailing blanks from the string type fields. youngsters, in my introductory assessments, it doesn't emerge that VARCHAR has any relish an outcome on on these trailing blanks. Is there any environment on the iSeries that will too be changed to instantly trim them?

     Milligan: In prevalent on IBM DB2 UDB for iSeries, VARCHAR facts forms should still be used for columns containing lengthy descriptions or memos that aren't referenced very commonly. 50 bytes is likely the smallest size you can are looking to utilize for a VARCHAR column. DB2 does should designate some further bytes for every row with variable size columns to hold music of the various size records, so one of the house discount rates may be consumed by means of these "further tracking" bytes. because of this overhead, the region discounts would only be noticeable on tables with a huge variety of rows.

     

    four. The dependable change between IBM DB2 databases

    query: one in impeccable their customers is dawn a task with moveable functions admit atmosphere (PASE) under V5R3. The programmers tried to work from that with C-program's to change assistance with the indigenous database and relish some predominant problems with things corresponding to host variables and others. recommendation that may aid to solve these issues is hardly accessible -- certainly in Germany. The German IBM software provider looks to be a bunch of "we're iSeries; Do not know tons about the relaxation of the IT world." are you able to aid with suggestions about the dependable dissimilarity between the UDB databases in the UNIX/windows and iSeries types?

    Milligan: click prerogative here to be trained the precise  modifications between the UDB databases within the UNIX/home windows and iSeries types.

     

    5. change the size of an latest field

    question: am i able to exchange the length of a box in a actual file devoid of recompiling it?

    Milligan: The surest approach to alternate the length of an existing province is the CHGPF CL command.

     

    6. accessing an specific file member the usage of SQL

    question: can you entry an specific file member the utilize of interactive SQL? I wish to entry a multi-member *PF.

    Milligan: yes, the easiest way is to create an alias for each secondary member that you simply wish to entry, and then utilize the ALIAS identify for your SQL request. creating an alias is only a one-time setup operation.

    right here's an illustration:CREATE ALIAS mylib/a1 FOR mylib/myfile(mbr1)

    choose * FROM mylib/a1 the spot f1>0

     

    7. Date codecs & creating a desk with SQL

    query: i am making an attempt to create a table the utilize of SQL. i would fancy the dates to be of the *us of a (mm/dd/yyyy) format. impeccable of their information were created with DDS and impeccable of their dates are DATFMT *u . s .. i would fancy to create some unique info with SQL, however I cannot find the dates within the structure that they use. How am i able to try this?

    Milligan: The DATFMT cannot be precise on SQL Create table. impeccable date values, youngsters, are saved by using DB2 in the identical inside layout even with the DATFMT that's specific on the column or box definition. When that facts is study from the SQL desk it might be transformed to the output date layout several through the software -- in your case the *united states format.

     

    8. what is the dissimilarity between DB2/400 and IBM DB2 UDB for the iSeries?

    query: what is the change between DB2/four hundred and IBM DB2 UDB for the iSeries?

    Milligan: DB2/400 and DB2 UDB for iSeries are practically the identical factor. iSeries (AS/four hundred) become able to undertake the IBM DB2 UDB branding when it delivered lots of unique database functionality in V4R4 of OS/400, so the database become renamed from DB2/four hundred to DB2 UDB for iSeries in that free up.

    that you can find greater suggestions on IBM iSeries and the DB2 UDB family unit here.

     

    9. entry information in SQL Server from the iSeries

    question: can you divulge me what I deserve to access information in a MS SQL database from the iSeries?

     Milligan: The white paper you are trying to find is Heterogeneous information entry for iSeries functions.

    To access a non-DB2 statistics source (including Microsoft SQL Server) from an iSeries program written in any high-level programming language, utilize WebSphere suggestions Integrator (formerly DB2 suggestions Integrator - DB2 II). This product requires that the statistics access to be performed with an SQL-primarily based interface reminiscent of CLI, embedded SQL or JDBC.

     

    10. How can i inform which indexes are being used with the aid of IBM DB2 and the query optimizer to enrich efficiency?

     question: How am i able to inform which indexes are being used via IBM DB2 and the query optimizer to enlarge performance?

     reply: In V5R3, a brand unique device turned into brought to iSeries Navigator referred to as Index Evaluator. This unique feature makes it effortless to resolve which indexes (and keyed logical information) are helping your SQL and question efficiency and which indexes are not pulling their weight. You can't depend on the object timestamp "final used date" because that expense is not impeccable the time up-to-date by means of the question optimizer.

    For each index defined over the desk, the evaluator returns statistics in regards to the remaining time an index become used within the implementation of a question and/or used to give data in regards to the desk statistics to the query optimizer. furthermore, it returns a signify number for the number of instances the query optimizer used an index object.

    under, you observe the output of the Index Evaluator, which is initiated through right-clicking on a desk object in iSeries Navigator and determining the exhibit Indexes assignment -- the task designation is Indexes on V5R3).


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    DB2 10 DBA for z/OS

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

    In September 2018, IBM announced a unique product, IBM Db2 AI for z/OS. This artificial intelligence engine monitors data access patterns from executing SQL statements, uses machine learning algorithms to resolve on optimal patterns and passes this information to the Db2 query optimizer for utilize 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 picture 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 utilize 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 impress system configuration changes that can improve performance.

    The next step was to implement this suite to resolve 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 universal Db2 subsystem performance is an famous 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 intuition 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 expansive 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 embrace indexes, table scans, various table unite methods and others. In the data warehouse and expansive 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 embrace software suites that allow the trade analyst to utilize 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 well-behaved analytics on your multiple data stores you exigency a well-behaved 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 too that a big fraction of reducing the total cost of ownership of these systems is to find 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 profit 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 powerful effect.

    Db2 12 for z/OS and artificial Intelligence

    Db2 version 12 on z/OS uses the machine learning facilities mentioned above to amass 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 utilize the model scoring data as input to its access path option algorithm.

    The result should be a reduction in CPU consumption as the Optimizer uses model scoring input to pick better access paths. This then lowers CPU costs and speeds application response times. A significant odds is that using AI software does not require the DBA to relish 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 famous if you store data in multiple places. For example, many analytical queries against expansive data require concurrent access to unavoidable 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 reckon 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 expansive data queries. In this environment it is common to win the dimension tables and copy them regularly to the expansive data application. In the IBM world this location is the IBM Db2 Analytics Accelerator (IDAA).

    Now deem about SQL queries from both operational applications, data warehouse users and expansive data trade analysts. From Db2's perspective, impeccable 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 trade analyst against expansive 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 yield 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 option is made, Db2 AI captures the SQL syntax, access path option 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 too 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 preempt changes to access path choices.
  • There are too 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 powerful outcome 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 trade 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 warrant 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 impeccable articles by Lockwood Lyon


    Thinking About Migrating to Version 11 of DB2 for z/OS? | killexams.com true questions and Pass4sure dumps

    Dec 4, 2013

    Craig S. Mullins

    Version 11 of DB2 for z/OS was released for universal availability on Oct. 25, 2013. Even if your company won’t be migrating prerogative away, it is wise to start learning about the unique functionality it offers. So let’s win a quick keep at some of the highlights of this latest and greatest version of DB2.

    Performance Claims in DB2

    As is bona fide with a unique version of DB2, IBM boasts of performance improvements available in DB2 11. The claims sweep from out-of-the-box savings ranging from 10% to 40% for different types of query workloads. Your actual savings will vary depending upon things fancy the query itself, number of columns requests, number of partitions, indexing, and the like. The standard operating procedure of rebinding to achieve the best results still applies. And, of course, if you utilize the unique features of DB2 11 IBM claims that you can achieve even better performance.

    DB2 11 too offers improved synergy with the latest mainframe hardware, the zEC12. For example, glimmer Express and pageable 1MB frames are used for buffer pool control blocks and DB2 executable code. So maintain in wit that getting to the latest hardware can aid out your DB2 performance and operation!

    Programmer Features in DB2

    In terms of unique functionality for developers, DB2 11 offers global variables (for passing data from program to program), improved SQLPL functionality, Alias support for sequence objects, improvements to Declared Global Temporary Tables (DGTTs), views on temporal data, XML improvements (including XQuery support), and a SQL Compatibility feature which can be used to minimize the impact of unique version changes on existing applications.

    There is too the unique APREUSE(WARN) BIND option, which causes DB2 to try to reuse previous access paths for SQL statements, but does not prevent the bind (or rebind) when access paths cannot be reused.

    DBA Features in DB2

    DB2 11 too offers many unique in-depth technical and DBA-related features too. Probably the most important, and one that impacts developers too, is transparent archiving using DB2’s temporal capabilities. If you understand the DB2 10 temporal capabilities, setting up transparent archiving is very similar.

    Another notable feature that will interest many DBAs is the capacity to utilize SQL to query more DB2 Directory tables. And the IBM DB2 Utilities are enhanced with better performance and improved capabilities. For example, REORG offers additional automation, RUNSTATS and LOAD offload more work to zIIP processors, REPAIR offers a unique DB2 Catalog repair capability, and DSNACCOX delivers improved performance.

    DB2 11 too delivers improved online schema change functionality, including the long-awaited DROP COLUMN capability, which can be used to antiseptic up unused columns in DB2 tables. Additionally, DB2 11 online schema change supports online altering of confine keys, which enables DBAs to change the confine keys for a partitioned table space without impacting data availability. And DB2 11 too removes some earlier administrative restrictions on administering tables with pending changes.

    Other unique DBA capabilities embrace better control over externalizing true Time Statistics, better coordination between DB2 and RACF, improved capabilities for column MASKs and PERMISSIONs, 2GB frame size for very big buffer pools, and faster CASTOUT and improved RESTART LIGHT capability for Data Sharing environments.

    Analytics and expansive Data Features in DB2

    DB2 11 too boasts unique features for supporting expansive data and analytical processing. Probably the biggest is the capacity to support Hadoop access. DB2 11 can be used to enable applications to easily and efficiently access Hadoop data sources using the generic table UDF capability to create a variable shape of UDF output table. Doing so allows access to BigInsights, which is IBM’s Hadoop-based platform for expansive data. As such, you can utilize JSON to access Hadoop data via DB2 using the UDF supplied by IBM BigInsights.

    DB2 11 too adds unique SQL analytical extensions, including GROUPING SETS, ROLLUP, and CUBE. And a unique version (V3) of IBM DB2 Analytics Accelerator (IDAA) is fraction of the mix too. IDAA V3 brings about improvements such as 1.3 PB of data storage, Change Data Capture support to capture changes to DB2 data and propagate them to IDAA as they happen, additional SQL functions for IDAA queries, and Work Load Manager integration.

    Take Some Time to Learn What DB2 11 Can Do

    DB2 11 for z/OS brings with it a bevy of absorbing and useful unique features. They sweep the gamut from evolution to admin­istration to performance to integration with expansive data. Now that DB2 11 is out in the province and available for organizations to start using it, the time has promote for impeccable DB2 users to win some time to learn what DB2 11 can do. 

    Craig S. Mullins, president and principal consultant with Mullins ?Consulting, Inc., has more than 2 decades of undergo in impeccable facets of data management and database systems development. You can reach him via his website at www.craigsmullins.com.


    z/OS® Version 8 DBA Certification Guide: DB2 Environment | killexams.com true questions and Pass4sure dumps

    This chapter provides an overview of the DB2 environment, detailing the components that you'll exigency to understand to start working with DB2.

    This chapter is from the book 

    DB2 operates as a formal subsystem of z/OS. DB2 utilities Run in the batch environment, and applications that access DB2 resources can Run in the batch, TSO (Time Sharing Option), USS (UNIX System Services), IMS (Information Management System), or CICS (Customer Information Control System) environment. IBM provides attachment facilities to connect DB2 to each of these environments.

    This chapter looks at the subsystem architecture that supports DB2 and the attachments available. This chapter too looks briefly at the installation process of the DB2 subsystem and the subsystem parameters known as DSNZPARMs, as well as how to execute the utilities and various commands.

    DB2 too has the capacity to access other DB2 subsystems and other relational databases. This chapter takes a keep at the methods for doing this.

    The IBM zSeries family of enterprises servers utilize z/OS, the next generation of operating system replacing OS/390. The core of z/OS is the groundwork control program MVS. Open-standard application server functions that support scalable, secure e-business applications are integrated with the MVS base.

    The z/OS platform can provide scalable, secure processing for various types of workloads in a high-performance environment, such as stock trading. The applications can be batch, OLTP (Online Transaction Processing), or DSS (Decision Support Systems). The major strengths of this environment are availability, flexibility, manageability, reliability, scalability, and security.

    The DB2 database management system operates as a formal subsystem of the z/OS operating system. DB2 processes can be executed in various address space regions within z/OS, such as IMS or CICS. Because it is required for DB2 version 8, z/OS provides a unique architecture that supports a 64-bit operating system. Thus, the z/OS platform can support many diverse applications with increased availability, scalability, and security.



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