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000-513 - DB2 UDB V7.1 for UNIX, Linux, Windows and OS/2 Database Administration - BrainDump Information

Vendor Name : IBM
Exam Code : 000-513
Exam Name : DB2 UDB V7.1 for UNIX, Linux, Windows and OS/2 Database Administration
Questions and Answers : 137 Q & A
Updated On : February 19, 2019
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000-513 exam Dumps Source : DB2 UDB V7.1 for UNIX, Linux, Windows and OS/2 Database Administration

Test Code : 000-513
Test Name : DB2 UDB V7.1 for UNIX, Linux, Windows and OS/2 Database Administration
Vendor Name : IBM
Q&A : 137 Real Questions

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IBM DB2 UDB V7.1 for

Introduction to DB2 UDB | killexams.com Real Questions and Pass4sure dumps

The DB2 ordinary Database (UDB) is a pass-platform database equipment developed by using IBM. This chapter introduces the newest version of this utility, and enumerates the facets that make UDB a good choice for your business.

This chapter is from the publication 

DATABASE 2 (DB2) usual Database (UDB) for Linux, UNIX, and home windows is a relational database management device (RDBMS) developed via IBM. version eight.2, available since September 2004, is probably the most present version of the product, and the one mentioned during this booklet.

during this chapter you are going to find out about:

  • The history of DB2
  • The DB2 portfolio of counsel management products
  • How DB2 is developed
  • DB2 server editions and consumers
  • How DB2 is packaged for builders
  • Syntax diagram conventions
  • due to the fact that the 1970s, when IBM analysis invented the Relational model and the Structured query Language (SQL), IBM has developed a complete family unit of RDBMS utility. development started on mainframe platforms equivalent to virtual desktop (VM), digital Storage prolonged (VSE), and assorted virtual Storage (MVS). In 1983, DB2 for MVS version 1 was born. "DB2" was used to point out a shift from hierarchical databases&8212;like the guidance administration gadget (IMS) accepted at the time&8212;to the brand new relational databases. DB2 construction continued on mainframe structures as well as on disbursed systems. [1]determine 1.1 shows one of the highlights of DB2 background.

    In 1996, IBM introduced DB2 UDB version 5 for distributed systems. With this edition, DB2 changed into capable of keep all types of digital records, including typical relational records, in addition to audio, video, and text files. It become the first version optimized for the internet, and it supported various distributed systems&8212;for instance, OS/2, windows, AIX, HP-UX, and Solaris&8212;from assorted companies. in addition, this common database was capable of run on a number of hardware, from uniprocessor techniques and symmetric multiprocessor (SMP) techniques to hugely parallel processing (MPP) methods and clusters of SMP programs. IBM included the time period "universal" within the name to represent the brand new capabilities of this version. All types of DB2 on disbursed platforms and on MVS, AS/400, VM, and VSE have adopted the identify DB2 UDB.

    nowadays, DB2 represents a portfolio of tips management products. desk 1.1 shows the DB2 information administration portfolio and the product offerings under every classification. To mainly discuss with database servers, "UDB" has to be delivered to the identify, as in DB2 UDB . In most books and files, together with this one, the phrases "DB2" and "DB2 UDB" are used interchangeably. except in any other case cited, once we use any one of these phrases during this publication, we are referring to DB2 running on Linux, UNIX, or windows.

    desk 1.1. DB2 advice administration products

    assistance administration products

    Description

    Product choices

    Database Servers

    store digital statistics and permit the sharing of assistance across distinct systems.

    IBM DB2 UDB

    IBM Informix

    IBM IMS

    IBM pink Brick Warehouse

    IBM U2

    IBM Cloudscape

    DB2 enterprise Intelligence

    assist customers bring together, prepare, manipulate, analyze, and extract effective guidance from all facts varieties to aid them make more insightful business choices sooner.

    DB2 Warehouse supervisor

    IBM DB2 guidance Integrator

    DB2 OLAP Server

    DB2 clever Miner

    DB2 text Miner

    DB2 Search Extender

    DB2 UDB facts Warehouse edition

    DB2 cube Views

    question Patroller

    DB2 content administration

    control content (unstructured data) akin to photos, digital media, observe processing documents, and net content material.

    IBM DB2 content supervisor

    IBM DB2 CommonStore

    IBM DB2 CM OnDemand

    IBM DB2 document manager

    IBM DB2 facts supervisor

    DB2 information Integration

    bring together dispensed tips from heterogeneous environments. businesses view their suggestions as if it was all dwelling in one vicinity.

    IBM DB2 assistance Integrator

    IBM DiscoveryLink for all times Sciences

    DB2 and IMS tools

    Automate services to aid organizations in the reduction of administrative costs.

    IMS & DB2 equipment & Utilities

    DB2 Multiplatform tools


    IBM iSeries (AS/400) DB2 UDB: correct 10 knowledgeable questions | killexams.com Real Questions and Pass4sure dumps

    This tip firstly seemed on Search400.com

    Kent Milligan, IBM iSeries/i5 DB2 UDB knowledgeable, has been answering Search400.com's member questions for greater than 5 years. iSeries users have asked Kent the identical questions time and again. so as to save you time, we have now compiled the accurate 10 questions requested about IBM iSeries/i5 DB2 for you. Do you've got a question it is now not listed here? Ask Kent your IBM DB2 questions.

      desk OF CONTENTS  1. recommended index now not used  2. constructing a default library in IBM DB2  3. CHAR fields vs. VARCHAR  4. The true change between IBM DB2 databases  5. trade the size of an current container  6. gaining access to an specific file member using SQL  7. Date formats & making a table with SQL  eight. what is the difference between DB2/four hundred and IBM DB2 UDB for the iSeries?  9. access facts in SQL Server from the iSeries  10. How am i able to inform which indexes are being used by way of IBM DB2 and the query optimizer to enrich efficiency?

     

    1. counseled index no longer used

    question: Operation Navigator recommends the use of an index for SQL efficiency monitoring. I created the informed index, nevertheless it looks like the gadget doesn't use it. I discover it peculiar that the index is counseled and then not used. is that this normal?

    Milligan: in spite of the fact that the query optimizer advises developing an index, it does not all the time choose to use it when growing its entry plan. There are some causes for this:

    The question optimizer does not at all times propose the perfect index. The reason for here is that currently, most effective local preference is used when choosing what index to suggest -- it does not yet agree with be part of, order by means of, or group through columns. subsequently, after you create that advised index, it will possibly now not decide to use it, because it remains not the perfect index. You may wish to manually intervene -- check the question and believe the be a part of, community by using, and order with the aid of columns to check what the ultimate index is and create that index.

    however, it could be recommending that index so that it may possibly extract stats from the index to further evaluate the choicest access formulation. as an example, as soon as the index has been created, it may well be using statistics from the index to check that question will return many rows, accordingly a table scan is the inexpensive access formulation.

    To more desirable keep in mind the theory of a perfect index and how indexes assist the query optimizer with data, which you can read the white paper Indexing and statistics recommendations for DB2 for i5/OS.

     

    2. developing a default library in IBM DB2

    question: How can i installation a default library in IBM DB2 with a view to not exchange our SQL statements? really, we are migrating from IBM B2 UDB home windows Server to the iSeries. in fact, in windows ambiance, our SQL statements run neatly and with the SET existing SCHEMAS = "EMPORIUM", we outline default schemas in order that we do not need to explicitly specify it in each and every of our SQL statements. How am i able to do that in an iSeries atmosphere? I deserve to define a library akin to select ... FROM MCMLIB.COMMANDES where. are you able to aid me?

    Milligan: It depends upon the application programming interface that you're the usage of. IBM DB2 UDB for iSeries introduced support for the SET present SCHEMA statement in V5R2. The iSeries entry ODBC and JDBC drivers assist connection keywords and residences to allow specifying a default library. right here's an example of the ODBC connection key phrase:

    DefaultLibraries=Schema1,Schema2

     

    three. CHAR fields vs. VARCHAR

    question: What are the most suitable practice instructions with regard to the usage of CHAR fields vs. VARCHAR fields on a IBM DB2 database for the iSeries?

    i am building a brand new database for a .net software and that i was on the grounds that VARCHAR for some longer fields to retailer storage. I had hoped that the VARCHAR container would also eradicate the trailing blanks from the string class fields. besides the fact that children, in my initial tests, it doesn't seem that VARCHAR has any have an effect on on these trailing blanks. Is there any surroundings on the iSeries that will also be changed to instantly trim them?

     Milligan: In general on IBM DB2 UDB for iSeries, VARCHAR statistics types should still be used for columns containing long descriptions or memos that are not referenced very regularly. 50 bytes is likely the smallest size you could need to use for a VARCHAR column. DB2 does should allocate some additional bytes for each row with variable size columns to preserve song of the varying size records, so one of the crucial house mark downs could be consumed by these "further tracking" bytes. because of this overhead, the area reductions would best be sizeable on tables with a big variety of rows.

     

    four. The precise change between IBM DB2 databases

    query: certainly one of our consumers is starting a challenge with transportable applications solution ambiance (PASE) below V5R3. The programmers tried to work from that with C-program's to change assistance with the native database and have some fundamental issues with things similar to host variables and others. counsel that can support to remedy these complications is infrequently attainable -- certainly in Germany. The German IBM software service appears to be a bunch of "we are iSeries; have no idea a good deal about the leisure of the IT world." can you help with assistance about the precise change between the UDB databases in the UNIX/windows and iSeries versions?

    Milligan: click here to be trained the actual  variations between the UDB databases within the UNIX/windows and iSeries versions.

     

    5. trade the length of an current box

    query: am i able to alternate the size of a field in a actual file devoid of recompiling it?

    Milligan: The highest quality approach to trade the size of an present box is the CHGPF CL command.

     

    6. having access to an express file member using SQL

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

    Milligan: yes, the easiest method is to create an alias for every secondary member that you just need to entry, and then use the ALIAS identify on your SQL request. developing an alias is just a one-time setup operation.

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

    choose * FROM mylib/a1 where f1>0

     

    7. Date formats & creating a table with SQL

    question: i'm trying to create a table the usage of SQL. i want the dates to be of the *country (mm/dd/yyyy) structure. All of our data have been created with DDS and all of our dates are DATFMT *us of a. i would like to create some new files with SQL, but I can not get the dates within the format that we use. How can i do that?

    Milligan: The DATFMT can not be exact on SQL Create desk. All date values, youngsters, are saved through DB2 within the identical internal layout in spite of the DATFMT it really is distinctive on the column or field definition. When that facts is examine from the SQL table it should be converted to the output date structure precise via the software -- on your case the *u . s . a . structure.

     

    8. what's the difference between DB2/400 and IBM DB2 UDB for the iSeries?

    query: what's the difference between DB2/400 and IBM DB2 UDB for the iSeries?

    Milligan: DB2/400 and DB2 UDB for iSeries are very nearly the identical issue. iSeries (AS/four hundred) changed into able to undertake the IBM DB2 UDB branding when it delivered lots of new database functionality in V4R4 of OS/400, so the database changed into renamed from DB2/400 to DB2 UDB for iSeries in that unlock.

    that you could discover extra information on IBM iSeries and the DB2 UDB family here.

     

    9. entry information in SQL Server from the iSeries

    query: are you able to tell me what I need to access information in a MS SQL database from the iSeries?

     Milligan: The white paper you are searching for is Heterogeneous statistics entry for iSeries applications.

    To access a non-DB2 records source (together with Microsoft SQL Server) from an iSeries program written in any excessive-level programming language, use WebSphere tips Integrator (previously DB2 tips Integrator - DB2 II). This product requires that the data access to be carried out with an SQL-based interface similar to CLI, embedded SQL or JDBC.

     

    10. How can i inform which indexes are being used by way of IBM DB2 and the question optimizer to enhance performance?

     query: How am i able to tell which indexes are being used by way of IBM DB2 and the question optimizer to enhance efficiency?

     answer: In V5R3, a new device changed into introduced to iSeries Navigator referred to as Index Evaluator. This new characteristic makes it effortless to analyze which indexes (and keyed logical files) are helping your SQL and query efficiency and which indexes aren't pulling their weight. You can't count on the object timestamp "ultimate used date" because that cost is not at all times up-to-date via the question optimizer.

    For each and every index defined over the desk, the evaluator returns information concerning the remaining time an index changed into used within the implementation of a query and/or used to provide data concerning the desk records to the question optimizer. furthermore, it returns a count number for the number of times the question optimizer used an index object.

    beneath, you see the output of the Index Evaluator, which is initiated by way of correct-clicking on a desk object in iSeries Navigator and identifying the show Indexes project -- the project name is Indexes on V5R3).


    IBM eServer units New checklist For Baan ERP efficiency | killexams.com Real Questions and Pass4sure dumps

    IBM eServer units New listing For Baan ERP performance

    IBM these days announced its new IBM eServer pSeries 680 server has set a new world record for Baan commercial enterprise resource Planning (ERP) utility performance.

    The benchmark examine was run on a 24-method pSeries 680 using breakthrough IBM silicon-on-insulator microprocessors, working DB2 customary Database on the trade's most suitable UNIX working device, AIX four.3.three.(2) The benchmark demonstrates the scalability of Baan ERP solutions running on IBM's new p680 UNIX server.

    The p680's world checklist become dependent the use of the normal BaanERP benchmark suite in two-tier customer/server mode which determines the actual variety of Baan Reference clients (BRUs) that can also be supported on a specific seller's laptop equipment. Joint Baan and IBM solutions are designed to scale to satisfy the calls for of the world's largest agencies, and support quick company boom.

    Benchmark particulars

    * The p680 operating DB2 general Database registered a brand new checklist for performance with BaanERP in a Hosted configuration.

    * These results had been done at IBM's Austin, Texas facility on a 24-method p680, working BaanERP 5.0b with DB2 UDB v7.1 with PI in a two-tier Hosted configuration. With this setup, a mark of 11,886 Baan Reference users (BRUs) become attained.

    * A BRU represents a single user executing a session that generates a reference load on the device. by relating all BaanERP periods to that reference load, the specific mix of periods finished at any given implementation will investigate the translation from the benchmark BRU to the optimum variety of concurrent clients for that implementation.

    For more information, discuss with www.baan.com, or www.ibm.com.


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    DB2 UDB V7.1 for UNIX, Linux, Windows and OS/2 Database Administration

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    Introduction to DB2 | killexams.com real questions and Pass4sure dumps

    This chapter introduced DB2 and its history, discusses the types of clients and servers available with DB2, and covers the types of clients and servers available with DB2.

    This chapter is from the book 

    DATABASE 2 (DB2) for Linux, UNIX, and Windows is a data server developed by IBM. Version 9.5, available since October 2007, is the most current version of the product, and the one on which we focus in this book.

    In this chapter you will learn about the following:

  • The history of DB2
  • The information management portfolio of products
  • How DB2 is developed
  • DB2 server editions and clients
  • How DB2 is packaged for developers
  • Syntax diagram conventions
  • Since the 1970s, when IBM Research invented the Relational Model and the Structured Query Language (SQL), IBM has developed a complete family of data servers. Development started on mainframe platforms such as Virtual Machine (VM), Virtual Storage Extended (VSE), and Multiple Virtual Storage (MVS). In 1983, DB2 for MVS Version 1 was born. "DB2" was used to indicate a shift from hierarchical databases—such as the Information Management System (IMS) popular at the time—to the new relational databases. DB2 development continued on mainframe platforms as well as on distributed platforms.1Figure 1.1 shows some of the highlights of DB2 history.

    In 1996, IBM announced DB2 Universal Database (UDB) Version 5 for distributed platforms. With this version, DB2 was able to store all kinds of electronic data, including traditional relational data, as well as audio, video, and text documents. It was the first version optimized for the Web, and it supported a range of distributed platforms—for example, OS/2, Windows, AIX, HP-UX, and Solaris—from multiple vendors. Moreover, this universal database was able to run on a variety of hardware, from uniprocessor systems and symmetric multiprocessor (SMP) systems to massively parallel processing (MPP) systems and clusters of SMP systems.

    Even though the relational model to store data is the most prevalent in the industry today, the hierarchical model never lost its importance. In the past few years, due to the popularity of eXtensible Markup Language (XML), a resurgence in the use of the hierarchical model has taken place. XML, a flexible, self-describing language, relies on the hierarchical model to store data. With the emergence of new Web technologies, the need to store unstructured types of data, and to share and exchange information between businesses, XML proves to be the best language to meet these needs. Today we see an exponential growth of XML documents usage.

    IBM recognized early on the importance of XML, and large investments were made to deliver pureXML technology; a technology that provides for better support to store XML documents in DB2. After five years of development, the effort of 750 developers, architects, and engineers paid off with the release of the first hybrid data server in the market: DB2 9. DB2 9, available since July 2006, is a hybrid (also known as multi-structured) data server because it allows for storing relational data, as well as hierarchical data, natively. While other data servers in the market, and previous versions of DB2 could store XML documents, the storage method used was not ideal for performance and flexibility. With DB2 9's pureXML technology, XML documents are stored internally in a parsed hierarchical manner, as a tree; therefore, working with XML documents is greatly enhanced. In 2007, IBM has gone even further in its support for pureXML, with the release of DB2 9.5. DB2 9.5, the latest version of DB2, not only enhances and introduces new features of pureXML, but it also brings improvements in installation, manageability, administration, scalability and performance, workload management and monitoring, regulatory compliance, problem determination, support for application development, and support for business partner applications.

    DB2 is available for many platforms including System z (DB2 for z/OS) and System i (DB2 for i5/OS). Unless otherwise noted, when we use the term DB2, we are referring to DB2 version 9.5 running on Linux, UNIX, or Windows.

    DB2 is part of the IBM information management (IM) portfolio. Table 1.1 shows the different IM products available.

    Table 1.1. Information Management Products

    Information Management Products

    Description

    Product Offerings

    Data Servers

    Provide software services for the secure and efficient management of data and enable the sharing of information across multiple platforms.

    IBM DB2

    IBM IMS

    IBM Informix

    IBM U2

    Data Warehousing and Business Intelligence

    Help customers collect, prepare, manage, analyze, and extract valuable information from all data types to help them make faster, more insightful business decisions.

    DB2 Alphablox

    DB2 Cube Views

    DB2 Warehouse Edition

    DB2 Query Management Facility

    Enterprise Content Management & Discovery

    Manage content, process, and connectivity. The content includes both structured and unstructured data, such as e-mails, electronic forms, images, digital media, word processing documents, and Web content. Perform enterprise search and discovery of information.

    DB2 Content Manager

    DB2 Common Store

    DB2 CM OnDemand

    DB2 Records Manager

    FileNet P8 and its add-on suites

    OmniFind

    Information Integration

    Bring together distributed information from heterogeneous environments. Companies view their information as if it were all residing in one place.

    IBM Information Server integration software platform, consisting of:

  • - WebSphere Federation Server
  • - WebSphere Replication Server
  • - WebSphere DataStage
  • - WebSphere ProfileStage
  • - WebSphere QualityStage
  • - WebSphere Information Services Director
  • - WebSphere Metadata Server
  • - WebSphere Business Glossary
  • - WebSphere Data Event Publisher

  • Understanding IBM DB2: Product history and strategy | killexams.com real questions and Pass4sure dumps

    The following is an excerpt from Understanding DB2: Learning visually with examples, 2nd edition, by Raul Chong,...

    Xiaomei Wang, Michael Dang and Dwaine Snow. It is reprinted here with permission from International Business Machines Corporation; Copyright 2008. Read the book excerpt below or download a free .pdf of the chapter: "Understanding IBM DB2: Product history and strategy."

    Database 2 (DB2) for Linux, UNIX, and Windows is a data server developed by IBM. Version 9.5, available since October 2007, is the most current version of the product, and the one on which we focus in this book.

    In this chapter you will learn about the following:

  • The history of DB2
  • The information management portfolio of products
  • How DB2 is developed
  • DB2 server editions and clients
  • How DB2 is packaged for developers
  • Syntax diagram conventions
  • 1.1 Brief history of DB2

    Since the 1970s, when IBM Research invented the Relational Model and the Structured Query Language (SQL), IBM has developed a complete family of data servers. Development started on mainframe platforms such as Virtual Machine (VM), Virtual Storage Extended (VSE), and Multiple Virtual Storage (MVS). In 1983, DB2 for MVS Version 1 was born. "DB2" was used to indicate a shift from hierarchical databases—such as the Information Management System (IMS) popular at the time—to the new relational databases. DB2 development continued on mainframe platforms as well as on distributed platforms.1 Figure 1.1 shows some of the highlights of DB2 history.

    Figure 1.1 DB2 timeline

    In 1996, IBM announced DB2 Universal Database (UDB) Version 5 for distributed platforms. With this version, DB2 was able to store all kinds of electronic data, including traditional relational data, as well as audio, video, and text documents. It was the first version optimized for the Web, and it supported a range of distributed platforms—for example, OS/2, Windows, AIX, HP-UX, and Solaris—from multiple vendors. Moreover, this universal database was able to run on a variety of hardware, from uniprocessor systems and symmetric multiprocessor (SMP) systems to massively parallel processing (MPP) systems and clusters of SMP systems.

    Even though the relational model to store data is the most prevalent in the industry today, the hierarchical model never lost its importance. In the past few years, due to the popularity of eXtensible Markup Language (XML), a resurgence in the use of the hierarchical model has taken place. XML, a flexible, self-describing language, relies on the hierarchical model to store data. With the emergence of new Web technologies, the need to store unstructured types of data, and to share and exchange information between businesses, XML proves to be the best language to meet these needs. Today we see an exponential growth of XML documents usage.

    IBM recognized early on the importance of XML, and large investments were made to deliver pureXML technology; a technology that provides for better support to store XML documents in DB2. After five years of development, the effort of 750 developers, architects, and engineers paid off with the release of the first hybrid data server in the market: DB2 9. DB2 9, available since July 2006, is a hybrid (also known as multi-structured) data server because it allows for storing relational data, as well as hierarchical data, natively. While other data servers in the market, and previous versions of DB2 could store XML documents, the storage method used was not ideal for performance and flexibility. With DB2 9's pureXML technology, XML documents are stored internally in a parsed hierarchical manner, as a tree; therefore, working with XML documents is greatly enhanced. In 2007, IBM has gone even further in its support for pureXML, with the release of DB2 9.5. DB2 9.5, the latest version of DB2, not only enhances and introduces new features of pureXML, but it also brings improvements in installation, manageability, administration, scalability and performance, workload management and monitoring, regulatory compliance, problem determination, support for application development, and support for business partner applications.

    DB2 is available for many platforms including System z (DB2 for z/OS) and System i (DB2 for i5/OS). Unless otherwise noted, when we use the term DB2, we are referring to DB2 version 9.5 running on Linux, UNIX, or Windows.

    DB2 is part of the IBM information management (IM) portfolio. Table 1.1 shows the different IM products available.

    Table 1.1 Information Management Products

    Information management products Description Product offerings Data servers Provide software services for the secure and efficient management of data and enable the sharing of information across multiple platforms IBM DB2IBM IMSIBM InformixIBM U2 Data warehousing and business intelligence Help customers collect, prepare, manage, analyze, and extract valuable information from all data types to help them make faster, more insightful business decisions. DB2 AlphabloxDB2 Cube ViewsDB2 Warehouse EditionDB2 Query Management Facility Enterprise content management & discovery Manage content, process, and connectivity. The content includes both structured and unstructured data, such as e-mails, electronic forms, images, digital media, word processing documents, and Web content. Perform enterprise search and discovery of information. DB2 Content ManagerDB2 Common StoreDB2 CM OnDemandDB2 Records ManagerFileNet P8 and its add-on suitesOmniFind Information integration Bring together distributed information from heterogeneous environments. Companies view their information as if it were all residing in one place. IBM Information Server integration software platform, consisting of:- WebSphere Federation Server- WebSphere Replication Server- WebSphere DataStage- WebSphere ProfileStage- WebSphere QualityStage- WebSphere Information-Services Director- WebSphere Metadata Server- WebSphere Business Glossary- WebSphere Data Event Publisher

    1.2 The role of DB2 in the information on demand world

    IBM's direction or strategy is based on some key concepts and technologies:

    On-Demand BusinessInformation On Demand (IOD)Service-Oriented Architecture (SOA)Web ServicesXML

    In this section we describe each of these concepts, and we explain where DB2 fits in the strategy.

    1.2.1 On-Demand business

    We live in a complex world with complex computer systems where change is a constant. At the same time, customers are becoming more demanding and less tolerant of mistakes. In a challenging environment like this, businesses need to react quickly to market changes; otherwise, they will be left behind by competitors. In order to react quickly, a business needs to be integrated and flexible. In other words, a business today needs to be an on-demand business.

    An on-demand business, as defined by IBM, is "an enterprise whose business processes -- integrated end to end across the company and with key partners, suppliers and customers -- can respond with speed to any customer demand, market opportunity, or external threat."

    IBM's on-demand business model is based on this definition. To support the on-demand model, IBM uses the e-business framework shown in Figure 1.2.

    Figure 1.2 The IBM e-business framework

    In Figure 1.2 the dotted line divides the logical concepts at the top with the physical implementation at the bottom. Conceptually, the IBM e-business framework is based on the on-demand business model operating environment, which has four essential characteristics: It is integrated, open, virtualized, and autonomic. These characteristics are explained later in this section. The area below the dotted line illustrates how this environment is implemented by the suite of IBM software products.

  • Rational is the "build" software portfolio; it is used to develop software.
  • Information Management (where DB2 belongs) and WebSphere are the "run" software portfolios; they store and manipulate your data and manage your applications.
  • Tivoli is the "manage" software portfolio; it integrates, provides security, and manages your overall systems.
  • Lotus is the "collaborate" software portfolio used for integration, messaging, and collaboration across all the other software portfolios.
  • The IBM DB2 software plays a critical role in the on-demand operating environment. All elements of the Information Management portfolio, including DB2, are developed with the four essential characteristics of the on-demand business model in mind.

  • Integrated: DB2 software has built-in support for both Microsoft and Java development environments. It is also integrated into WebSphere, Tivoli, Lotus, and Rational products. In addition, the DB2 family has cross-platform capabilities and can be integrated natively with Web services and message-queuing technologies. It also provides support for heterogeneous data sources for both structured and unstructured information, including pureXML support.
  • Open: DB2 software allows for different technologies to connect and integrate by following standards. Thus, it provides strong support for the Linux operating system and for Java, XML, Web services, grid computing, and other major industry applications.
  • Virtualized: Grid computing technology, a type of distributed computing, collects and shares resources in a large network to simulate one large, virtual computer. DB2 software products support grid computing technology through federation and integration technologies. Both of these are discussed in more detail later in this chapter.
  • Autonomic: An autonomic computing system manages, repairs, and protects itself. As systems become more complex, autonomic computing systems will become essential. DB2 provides self-tuning capabilities, dynamic adjustment and tuning, simple and silent installation processes, and integration with Tivoli for system security and management.
  • The bottom of Figure 1.2 shows the operating systems in which the IBM software suite can operate: Linux, UNIX, Windows, i5/OS, and z/OS. Below that, the servers, storage, and network An on-demand business depends on having information available on demand, whenever it is needed, by people, tools, or applications. Information On Demand is discussed in the next section.

    1.2.2 Information On Demand

    Information On Demand, as its name implies, is making information available whenever people, tools, or applications demand or request it. This can be made possible by providing information as a service. IBM commonly uses the illustration in Figure 1.3 to explain what "information as a service" means. Let's use the following example to explain this concept in a more interesting way. Assume you are the general manager of a supermarket, and your main goal is to make this business profitable. To accomplish this, you must make good decisions, such as how to display items on shelves so that they sell more. In order to make good decisions, you need to have up-todate, reliable information.

    Figure 1.3 Information as a service

    As depicted at the bottom of Figure 1.3, many businesses today have a large number of heterogeneous sources of information. For this particular example let's assume your suppliers use SAP and DB2, your sales department uses an internally developed application, your smaller supermarket clients use Peoplesoft, and Oracle, and so on. Thus, you see several heterogeneous applications with semi-raw data, which will only be valuable to you if you can integrate them all. In order to integrate the data, it needs to be provided as a service, and this is possible through the use of standards such as JDBC and ODBC, and wrapping each of these applications as a Web service. Once the data are integrated, you may come up with decisions that might not have been logical otherwise, such as putting beer and diapers in the same aisle in order to sell more of both products.

    With the data integrated you can further massage it to perform some additional analysis and get insightful relationships. This further massaging of the data can be performed by other software, such as entity analytics, master data, and so on as shown on the right side of the figure. Finally, this integrated data can be passed to other processes, tools and applications, and people for further analysis.

    1.2.3 Service-Oriented Architecture

    Service-Oriented Architecture (SOA), as its name implies, is an architecture based on services -- mainly Web services. SOA is not a product, but a methodology, a way to design systems that allow for integration, flexibility, loosely coupled components, and greater code reuse. With this architecture, business activities are treated as services that can be accessed on demand through the network.

    Figure 1.4, which is also used in many IBM presentations, depicts the SOA lifecycle. It consists of four iterative steps or stages—Model, Assemble, Deploy, Manage—and a fifth step that provides guidance throughout the cycle: Governance & Processes.

    Figure 1.4 The SOA Lifecycle

    A more detailed explanation of each stage in the SOA lifecycle is provided in Table 1.2.

    SOA Stage Description IBM Tools That Can Be Used Assemble This stage is about building new services and/or reusing existing ones, and assembling them to form composite applications. WebSphere Integration DeveloperRational Application Developer Deploy In this stage your services and applications are deployed into a secure environment that integrates people, processes, and information within your business. WebSphere Process ServerWebSphere Message BrokerWebSphere Partner GatewayWebSphere PortalWebSphere Everyplace DeploymentWorkplace Collaboration ServicesWebSphere Information IntegratorWebSphere Application Server Manage In this stage, you need to manage and monitor your system, find and correct inefficiencies and problems, deal with security, quality of service, and general system administration. DB2 Content ManagerWebSphere Business MonitorTivoli Composite ApplicationManager for SOATivoli Identity Manager Governance Governance underpins all the lifecycle stages. It ensures that all the services from inside and outside the organization arecontrolled so the system does not spin out of control. Governance provides both direction and control. N/A

    1.2.4 Web Services

    A Web service, as its name implies, is a service made available through the Web. A more formal, but still simple definition states that a Web service is a way for an application to call a function over the network; however, there is no need to know

  • The location where this function will be executed
  • The platform in which the function will run (for example Linux, UNIX, Windows, the mainframe, Mac OS/X, etc.)
  • The programming language in which the function was created (for example Java, Cobol, C, etc.)
  • Web services are powerful because they allow businesses to exchange information with minimal or no human intervention. Let's go back to the supermarket example to see the power of Web services in a more realistic scenario:

    Let's say you order 100,000 cookies from a supplier, expecting all of them to be sold in one month. After the month passes only 60,000 are sold, so you are left with 40,000. Because these are cookies of a special kind, they will spoil in two weeks. You need to act fast and sell them to other smaller supermarkets or Internet companies such as Amazon.com or eBay. You can grab the phone and spend an entire morning calling each of the smaller supermarket clients, offering them as many cookies as they would want to buy from you; or you could take a more "technical" approach and develop a simple application that would do this for you automatically. Assuming each of these smaller supermarket clients provide Web services, you could develop an application (in any programming language) that allows you to SQL insert overstocked items, such as the 40,000 cookies, into a DB2 database table overstock. You could then define a trigger on this table which invokes a DB2 stored procedure (more about triggers and stored procedures in Chapter 7, Working with Database Objects) that could consume Web services provided by the Internet companies or the smaller supermarket clients. This scenario is depicted in Figure 1.5.

    Figure 1.5 Using a Web service

    As you can see from Figure 1.5, the simple act of inserting 40,000 cookies through your application into the table overstock in the DB2 server allows the systems of many smaller supermarkets and Internet companies, through the use of their Web services, to make the cookies available on their systems quickly, opening new sales channels. In Figure 1.5, DB2 is behaving as a Web service consumer, because it is using or "consuming" the Web services, while the smaller supermarket clients and Internet companies are behaving as the Web service providers, because they are making these Web services available for others to use. For simplicity purposes, we have omitted in Figure 1.5 the call to a stored procedure. This scenario shows the power of Web services: business-to-business exchange of information using applications. There is no need for human intervention. DB2 and Web services will be discussed in more detail in Chapter 10, Mastering the DB2 pureXML Support.

    1.2.5 XML

    XML stands for eXtensible Markup Language. XML's popularity and use has grown exponentially in the past few years, as it is a core component of many new technologies. The easiest way to understand how XML works is by comparing it to HTML, given that many people today are familiar with HTML. Let's take a look at the following line in an HTML document:

    RaulIn the above line, the tag indicates the way you would like to display the text, in this case, Raul in bold. Now Let's take a look at the following line in an XML document: Raul In the above line, the tag describes the text Raul. The tag is saying that Raul is in fact a name. See the difference? In HTML, tags are used to indicate how you would like to display the data; in XML, tags are used to actually describe the data. Table 1.3 describes the characteristics of XML. Table 1.3 Characteristics of XML XML Characteristic Description Flexible XML is a flexible language because it is easy to modify or adapt. XML is based on a hierarchical model, which is most appropriate to store unstructured types of information such as financial information, life sciences information (for example Genome, DNA), and so on. Easy to extend XML is easy to extend; that is, you can create your own tags. For example, in addition to the tag in the example above, you could create new tags such as , , and so on. This means you can create your own language or protocol based on XML. Describes itself XML can describe itself; another document called an XML Schema (which itself is an XML document) is used to provide rules and descriptions as to what each of the tags in a document mean and restrict the type of data the tags can contain. An older method, but still widely used today, is to use DTD documents. In the above example, an XML Schema or DTD document can indicate that the tag can only be used to store characters. Can be transformed to other formats GXML can be transformed to other formats like HTML, using Extensible Stylesheet Language Transformations (XSLT), a language used for the transformation of XML documents. Independent of the platform or vendor XML is independent of the platform or vendor; after all, XML documents can be stored in text files containing tags. Text documents are supported everywhere. Easy to share XML is easy to share with other applications, businesses, and processes given that it can be stored as a text document. Because it is easy to share, it's appropriate as the core of Web services. XML is also at the core of Web 2.0 development technologies. Web 2.0, as defined in Wikipedia. org "refers to a perceived second generation of web-based communities and hosted services -- such as social-networking sites, wikis, and folksonomies -- which facilitate collaboration and sharing between users". Wikis, blogs, mash-ups, RSS or atom feeds, and so on, which are part of Web 2.0 development technologies, are all based on or related to XML. This makes DB2 9.5 the ideal data server platform for Web 2.0 development. Table 1.4 describes the different technologies that are part of Web 2.0. (To see Table 1.4 and to read more, download the free .pdf of this chapter.)XML is discussed in more detail in Chapter 10, Mastering the DB2 pureXML Support.More informationContinue reading about IBM DB2 by downloading a free .pdf of the chapter: "Understanding IBM DB2: Product history and strategy."Read other excerpts from data management books in the Chapter Download Library.Listen to a podcast about IBM DB2 9 certifications with Roger Sanders.

    How an old Drawbridge helped Microsoft bring SQL Server to Linux | killexams.com real questions and Pass4sure dumps

    How an old Drawbridge helped Microsoft bring SQL Server to LinuxEnlarge Tom Hilton reader comments with 52 posters participating, including story author Share this story
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  • When in March this year Microsoft announced that it was bringing SQL Server to Linux the reaction was one of surprise, with the announcement prompting two big questions: why and how?

    SQL Server is one of Microsoft's major Windows applications, helping to drive Windows sales and keep people on the Windows platform. If you can run SQL Server on Linux, well, that's one less reason to use Windows.

    And while SQL Server does share heritage with Sybase SQL Server (now called SAP ASE), a Unix database server that Microsoft ported to Windows, that happened a long time ago. Since 1993, when Sybase and Microsoft went their separate ways, the products have diverged and, for the last 23 years, Microsoft SQL Server has been strictly a Windows application. That doesn't normally make for easy porting.

    Reaching the customers where they are

    Even as a Windows-exclusive offering, SQL Server has widespread adoption, taking a substantial chunk of the paid database market. But being Windows-specific has meant that, equally, there was always a proportion of the market that SQL Server couldn't reach. It doesn't much matter what the merits of the database engine really are; it was off-limits to organizations that standardized on Linux.

    Rohan Kumar, general manager of database systems at Microsoft, told us that there had long been some level of demand from customers who wanted the flexibility to pick a database without being forced onto a specific operating system but that over the past two to three years these calls had become louder. Containerization and Docker, in particular, were cited as stimulating this demand; organizations want to take advantage of these features to streamline their deployments and management, but at the same time, they want SQL Server's features and its not-as-cripplingly-expensive-as-Oracle licensing.

    (Windows Server 2016 supports Docker-compatible containers, too, but the broader point remains: companies want to be able to take advantage of platform features as they become available without tying their hands when it comes to decisions about applications.)

    In the past, Microsoft might have ignored these requests. In the past, Microsoft did ignore these requests. But the company is changing and is increasingly going after opportunities that it might once have ignored. This has taken many forms over the past few years. The release of Office for iPad, for example, cedes what might otherwise have been a unique advantage for Windows-based platforms, but the opportunity to consolidate Office's position across the industry and strengthen the Office 365 subscription value proposition has outweighed that concern.

    Reaching more customers with more features

    SQL Server is seeing two changes that we might not have expected from the Microsoft of old. One of these is already available today; with Service Pack 1 for SQL Server 2016, Microsoft radically changed the way the database's different versions and price points worked. Traditionally, the different variants of SQL Server—Express, Standard, Enterprise—have offered two kinds of variation. They have different levels of scalability—Express is limited to a certain amount of RAM and certain sizes of database—and different features. Some high-end features, such as extensive encryption support, were unavailable in the cheaper versions of the database.

    With Service Pack 1, the feature differences were substantially eliminated, leaving only the scalability differences. This means that even the free Express version, for example, has the same encryption capabilities as the expensive versions; it just can't be used to host such big databases.

    Scott Guthrie.Scott Guthrie. Microsoft

    Scott Guthrie, executive vice president for cloud and enterprise, told us that this kind of change came with some risks, but it also offered opportunities. He pointed to Visual Studio Community Edition, released in 2014, as a kind of precursor to this. Making a fully featured version of Visual Studio available for free was a decision that could have cost revenue as paying developers moved to the free version (prior to Community Edition, the Express Edition products were free, but these had certain functional constraints not found in Community Edition), but Guthrie told us that the company had actually seen Visual Studio revenue grow. Teams and companies that otherwise might not have used Visual Studio at all used the product and became drawn to it.

    Guthrie expresses a similar hope for Service Pack 1. Sure, some companies may have been paying for SQL Server solely to access features not found in the Express SKU, and they may now save that money, but the company hopes that this will be offset by developers making greater use of SQL Server in general, making greater use of SQL Server's complex features (ones previously available only in expensive versions), and seeing increased sales as these new applications need the scalability that the paid SKUs provide.

    Kumar told us that expectations for SQL Server on Linux were similar. There was some nervousness and trepidation when the decision was first made to bring SQL Server to Linux—would it simply cut Windows revenue as companies switched to the cheaper server operating system?—but as the project progressed, the team grew more confident that it would open up SQL Server to a whole set of customers who previously couldn't even contemplate it because of its OS dependency.

    Moreover, he said that without offering this kind of flexibility, there were customers using SQL Server that were likely to defect to other options anyway to reduce their platform lock-in. SQL Server for Linux carries risks, but so does keeping SQL Server restricted to Windows. The opportunity was felt to outweigh these concerns.

    The initial response has been encouraging, with 21,000 people signing up to use the Linux preview and 3,000 to 4,000 using it extensively.

    Lowering the Drawbridge

    The decision to go ahead with SQL Server for Linux was made about 18 months ago. The question then became, how to do it?

    It was seen as essential that SQL Server on Linux have identical semantics and performance to SQL Server on Windows, right down to the level of database file compatibility. This would be very difficult to do if the software were forked to have two separate versions each with their own approach to file I/O, memory management, threading, and so on.

    But SQL Server is a large application, and although its interactions with Windows are relatively narrow—things like the graphical management tools are remaining Windows-only, at least for the time being, so a large part of the Windows API surface is avoided—it still uses about 1,500 Win32 API calls. Supporting all of these on Linux would be a major undertaking.

    Drawbridge runs an almost complete operating system within a process.Drawbridge runs an almost complete operating system within a process.

    The first piece of the puzzle was a Microsoft Research Project that was completed in 2011 called Drawbridge. The Drawbridge project explored a new approach to process virtualization and isolation with two major elements: a picoprocess, which is a lightweight process that has access to a small number of about 50 low-level kernel features, and a Library OS (LibOS), which is a modified operating system stack designed to run within a picoprocess.

    An application and LibOS run within the picoprocess together, with LibOS providing all the operating system-like functionality that the application depends on, such as threading, virtual memory management, and a full set of file I/O features. LibOS talks to the underlying kernel using those 50 or so API calls.

    This approach offers much of the isolation and security that virtual machines offer—each picoprocess has its own LibOS, so even if the application is compromised and the kernel attacked, it's only the LibOS "kernel" running in user mode, rather than the real kernel running below—but with lower overheads. LibOS doesn't need to provide an entire operating system's worth of functionality; it can be restricted to only the APIs and services that a specific application needs. This cuts the per-application memory and processor overhead when compared to running each individual application within a virtual machine.

    Though the Drawbridge project ended in 2011, Microsoft has drawn inspiration from it already. The picoprocess concept is used for the Windows Subsystem for Linux. Linux processes on Windows are "empty" processes that omit the usual Windows libraries. In fact, they can't even make Windows kernel function calls. WSL doesn't use a Library OS. Instead, it uses a kernel-mode component that offers the WSL picoprocesses the ability to make Linux kernel function calls; that component offers a subset of the Linux API built on top of the Windows NT kernel.

    SQL Server's operating system on top of an operating system

    The second major element to SQL Server for Linux is a piece of work that the SQL Server team did for SQL Server 2005, called SQLOS.

    Dependent as it was on Windows, SQL Server is actually something of an anomaly when it comes to Windows programs, because it avoids using Windows as much as it can. Windows, as a general purpose OS, offers all manner of functionality. It has a filesystem, with complex data caching. It has a thread scheduler, designed for everything from single core machines up to monstrous servers with hundreds of cores; it has a memory manager that works with anything from a browser on a machine with 2GB RAM to a database on a machine with 1TB RAM. It spans a huge range of configurations and workloads, and it does so with a single kernel that works the same way (albeit with a small number of tunable options) across the board.

    SQL Server, however, is a performance-critical application that often (though not always) runs on dedicated hardware. The engineers understand its workload very well and want to optimize for that workload and that workload alone. Accordingly, they've designed SQL Server to handle many of the tasks that the operating system would normally handle.

    For example, most Windows applications use the Windows file cache to improve disk I/O performance. SQL Server, however, uses unbuffered I/O, bypassing the Windows cache entirely, and instead implements its own internal caching system. Similarly, SQL Server handles scheduling and switching between threads, another task traditionally handled by the OS.

    SQLOS also replicates much of an operating system's functionality. Enlarge / SQLOS also replicates much of an operating system's functionality.

    Thanks to SQLOS, the core SQL Server engine doesn't actually depend on Windows very much. SQLOS uses a few low-level features from the Windows kernel and then implements its own "operating system" on top of them.

    In other words, SQLOS is doing a lot of the kind of work that LibOS does.

    Not every part of SQL Server uses SQLOS. The SQL Server Agent service, used for scheduling tasks within the database, relies on regular OS handling of file I/O and process scheduling and so on. So too do elements such as SQL Server's XML support (which uses Microsoft's MSXML XML library) and SQLCLR, the .NET runtime embedded within the database. These need something closer to full Win32 to run—and again, that sounds a lot like LibOS as it provides a version of Win32, or at least a large part of it.

    Taking the best of both worlds

    Accordingly, Microsoft took these ideas and merged them. The final snapshot of the LibOS code from Drawbridge was merged with SQLOS, producing what Microsoft calls SQLPAL, the SQL Platform Abstraction Layer. Whereas the Drawbridge LibOS offered Windows-style thread scheduling, I/O management, and so on, SQLPAL took the SQL Server-optimized code from SQLOS for these features, creating a kind of cut-down version of Win32 with its performance tailored to SQL Server's needs.

    SQLPAL's Win32 support is not complete—around 1 percent (81MB) of Windows libraries are used, with SQLPAL itself being another 8MB—but it's sufficient to run MSXML, SQL Server Agent, and many of the other essential parts of SQL Server. While these components used the regular Windows scheduler, I/O, and memory management in older SQL Server, with SQLPAL even these parts now use the optimized, specialized routines.

    Drawbridge's LibraryOS combined with SQLOS gives us SQLPAL.Drawbridge's LibraryOS combined with SQLOS gives us SQLPAL.

    Beneath SQLPAL is a layer called a "host extension" (the equivalent in Drawbridge was called a Platform Abstraction Layer) that provides the bridge between the underlying platform, either Linux or Windows. Everything above the host extension is common code; the host extension has Win32 and Linux versions.

    Indeed, the things running on top of the host extension are not merely common code; they're common binaries. SQL Server on Linux is not a Linux executable in Linux's ELF format. It's a Windows executable, in Windows' PE format. You could in principle take it and run it on Windows.

    The design means that in broad strokes, the performance of SQL Server on Linux and SQL Server on Windows will be matched; the underlying OS is in many regards bypassed completely except for the set of calls that the host extension makes. However, a few pieces are performance critical, such as disk I/O. In these areas, Microsoft has cut back the amount of code between SQL Server and the underlying platform, enabling SQL Server to make more or less direct calls to the underlying operating system APIs. In some cases this requires a small amount of translation code—for example, SQL Server is built to use Windows' scatter/gather I/O, which uses different memory layouts to Linux's vectored I/O, so there must be conversion between the two—but often even this isn't needed.

    Work in progress

    In the current preview release, the merging of SQLOS and LibOS is still ongoing. Currently, SQL Server includes its own SQLOS, sitting atop the SQLPAL. Microsoft is working to remove SQLOS and make SQL Server call into SQLPAL directly. When this is done, there will be a single SQLPAL with both SQL Server and all its ancillary processes and libraries running on top of it.

    There are still parts of SQL Server that won't be in the initial stable release of SQL Server for Linux. Some of these, such as a SQL Server feature called FileTables, are tricky because they depend on specific features of the NTFS filesystem. Similarly, integrated Windows authentication depends on Windows. It's not clear how these features will be brought to Linux, if indeed they are. Other missing features, such as Full Text Search and Reporting Services, are likely to be brought over eventually; they just require additional developer time and so won't be ready in time for the initial release. The long-term goal is to have every part of SQL Server that makes sense to run on Linux running on Linux.

    Testers of the preview have even expressed a desire for this to include SQL Server's graphical management tools. Currently, SQL Server for Linux offers only command-line-based management. The graphical tools run on Windows only at the moment, though they can be used to manage the database running on both operating systems.

    To be truly credible as a Linux database, there's more work than just porting SQL Server itself. Application support is also important. Microsoft has taken some steps toward this already—for example, the JDBC driver, used to access SQL Server from Java applications, was recently open sourced—but there's much more work to do to ensure that SQL Server is on the same footing as other Linux database engines when it comes to support from management front-ends and software libraries. Kumar told us that this is an area of ongoing effort and that the importance is recognized.

    With SQL Server on Linux, the Drawbridge project has been one of Microsoft's more obviously fruitful pieces of research. Both the picoprocess concept and the LibOS concept have been used and are—albeit separately from one another—or will be, part of shipping software. Early indications suggest strong interest in SQL Server for Linux, and while the company is still a little way off, the end goal of having just "SQL Server," rather than SQL Server for Windows and SQL Server for Linux, looks attainable.



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