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Selected common SQL features for developers of portable DB2 applications
Are you writing SQL applications that need to be portable across platforms? Here's the information you need to make sure your applications are portable. The tables in this article summarize the common SQL application features and make it easy for you to develop applications using SQL that is portable across the DB2 family, including DB2 for z/OS, DB2 for i, and DB2 for Linux, UNIX, and Windows.
Also available in: Chinese   Russian   Spanish  
26 Sep 2014
Achieve improved database interoperability with SQL and RDB aliases
In today's complex environments, where data is spread across numerous homogeneous and heterogeneous databases, simplification is a necessity. Three-part naming offers that simplification for database connectivity by allowing skilled data architects, programmers, and system administrators the ability to easily manage remote Distributed Relational Database Architecture (DRDA) connections within SQL applications and data centers. This article gives you insight into the options available to use DRDA more proficiently through three-part naming and RDB aliases. Understanding these concepts can enable you to improve your SQL database interoperability in your SQL applications or daily use and also gain a level of database abstraction and portability.
18 Sep 2014
Selected common SQL features for developers of portable DB2 applications
Are you writing SQL applications that need to be portable across platforms? Here's the information you need to make sure your applications are portable. The tables in this article summarize the common SQL application features and make it easy for you to develop applications using SQL that is portable across the DB2 family, including DB2 for z/OS, DB2 for i, and DB2 for Linux, UNIX, and Windows.
Also available in: Spanish  
01 Sep 2014
Selected common SQL features for developers of portable DB2 applications
Are you writing SQL applications that need to be portable across platforms? Here's the information you need to make sure your applications are portable. The tables in this article summarize the common SQL application features and make it easy for you to develop applications using SQL that is portable across the DB2 family, including DB2 for z/OS, DB2 for i, and DB2 for Linux, UNIX, and Windows.
Also available in: Spanish  
01 Sep 2014
Selected common SQL features for developers of portable DB2 applications
Are you writing SQL applications that need to be portable across platforms? Here's the information you need to make sure your applications are portable. The tables in this article summarize the common SQL application features and make it easy for you to develop applications using SQL that is portable across the DB2 family, including DB2 for z/OS, DB2 for i, and DB2 for Linux, UNIX, and Windows.
01 Sep 2014
Generate reports remotely and offline with InfoSphere Optim Performance Manager command-line utility
You can use predefined report features in the InfoSphere Optim Performance Manager for DB2 for Linux, UNIX and Windows web console to generate reports in HTML, PDF, PPT, and XLS formats. In this tutorial, learn how to extend these features with the command-line utility (CLU). With the CLU, you can generate reports in offline and batch mode without logging on to the web console, schedule reports to run at periodic intervals, and send reports as attachments to team members.
14 Aug 2014
Remove and reintegrate an auxiliary standby in an HADR setup
Starting with IBM DB2 10.1, the High Availability Disaster Recovery (HADR) feature supports multiple standbys. With multiple standbys, you can have your data in more than two sites for improved data protection with a single technology. This article provides detailed steps for removing and reintegrating the auxiliary standby in a multiple standby HADR setup.
13 Aug 2014
Gain confidence about data security in the cloud
This tutorial demystifies cloud security and arms you with the know-how to adopt the cloud with confidence. Learn how cloud security is a shared responsibility between the cloud service provider and the client. The responsibilities of each party are explored. Also walk through a data security use case involving IBM BLU Acceleration for the Cloud. When certain criteria are met, clients can achieve data security equal to or better than what they can achieve onsite.
Also available in: Chinese   Spanish  
07 Aug 2014
Use the DB2 with BLU Acceleration Pattern to easily deploy a database
The database as a service (DBaaS) 1.1.0.8 component of the IBM PureApplication System introduced many new features. This article describes some of them, including deployment of DB2 with BLU, increasing the database resources, and backup. You also will learn how the DB2 with BLU Acceleration Pattern can make it easier and faster to create and deploy BLU-enabled datasets in DBaaS 1.1.0.8.
Also available in: Chinese  
24 Jul 2014
DB2 monitoring enhancements for BLU Acceleration
BLU Acceleration is a collection of technologies for analytic queries that was introduced in IBM DB2 for Linux, UNIX and Windows (LUW) Version 10.5. BLU Acceleration can provide significant benefits in many areas including performance, storage savings, and overall time to value. This article provides an overview of the monitoring capabilities that support BLU Acceleration. These capabilities provide insight into the behavior of the database server and assist with tuning and problem determination activities. Extensive example queries help you start monitoring workloads that take advantage of BLU Acceleration.
24 Jul 2014
DB2 monitoring: Migrate from snapshot monitor interfaces to in-memory metrics monitor interfaces
This article helps you migrate from the snapshot monitor interfaces to the in-memory metrics monitor interfaces that were first introduced in DB2 for Linux, UNIX, and Windows Version 9.7.
17 Jul 2014
Increase DB2 availability
This article demonstrates how to use a cloud provider to create a reliable tie-breaking method to avoid a split brain scenario. The procedure is for two node clusters running IBM DB2 for Linux, UNIX and Windows (LUW) and the integrated high availability (HA) infrastructure. See how to automate any two-node failover for DB2 LUW 10.1 or higher.
19 Jun 2014
Integrate DB2 for z/OS with InfoSphere BigInsights, Part 1: Set up the InfoSphere BigInsights connector for DB2 for z/OS
Learn how to set up integration between IBM DB2 11 for z/OS and IBM InfoSphere BigInsights. Enable access to structured and non-structured data that is stored in the Hadoop Distributed File System and send the results back to DB2, where the data can be integrated with online transactional data. Using a scenario that is common to all DB2 for z/OS users, learn to create a big data solution that uses the user-defined functions JAQL_SUBMIT and HDFS_READ to run jobs on InfoSphere BigInsights and retrieve the results with SQL.
17 Jun 2014
Calculate storage capacity of indexes in DB2 for z/OS
With the drastic growth of data stored in IBM DB2 tables, index sizes are bound to increase. Most indexes are still uncompressed, so there's an urgent need to monitor indexes to avoid unforeseen outages related to index capacity. This article describes a process to calculate the capacity limit for various types of indexes. Once you know how to calculate the capacity of indexes in different situations, you can monitor their growth to avoid outages.
12 Jun 2014
Convert row-organized tables to column-organized tables in DB2 10.5 with BLU Acceleration
With IBM DB2 10.5 you can easily convert row-organized tables to column-organized tables by using command line utilities or IBM Optim Data Studio 4.1. This article introduces two approaches for table conversions: the db2convert command and the ADMIN_MOVE_TABLE stored procedure. We also describe a manual conversion. Learn the advantages and disadvantages of the different conversion approaches. Best practices are also discussed.
12 Jun 2014
DB2 10.1 fundamentals certification exam 610 prep, Part 2: DB2 security
This tutorial introduces authentication, authorization, privileges, and roles as they relate to IBM DB2 10.1. It also introduces granular access control and trusted contexts. This is the second in a series of six tutorials designed to help you prepare for the DB2 10.1 Fundamentals certification exam (610). It is assumed that you already have basic knowledge of database concepts and operating system security.
Also available in: Chinese  
05 Jun 2014
Measure the impact of DB2 with BLU Acceleration using IBM InfoSphere Optim Workload Replay
In this article, learn to use IBM InfoSphere Workload Replay to validate the performance improvement of InfoSphere Optim Query Workload Tuner (OQWT) driven implementation of DB2 with BLU Acceleration on your production databases. The validation is done by measuring the actual runtime change of production workloads that are replayed in an isolated pre-production environment.
Also available in: Chinese   Russian  
08 May 2014
DB2 10.1 DBA for Linux, UNIX, and Windows certification exam 611 prep, Part 6: High availability
This tutorial highlights the data integrity skills you need in order to protect your database against unexpected failures. Learn how to configure and manage the high availability (HA) features of DB2 V10.1, which introduced the HADR multiple standby setup that provides a true HA and disaster recovery (DR) solution for your mission-critical databases. Examples illustrate how to configure this feature. You also learn about the DB2 pureScale technology that provides continuous HA to your critical business operations. This is part 6 of a series of eight DB2 10.1 DBA for Linux, UNIX, and Windows certification exam 611 tutorials.
01 May 2014
XML or JSON: Guidelines for what to choose for DB2 for z/OS
IBM DB2 for z/OS offers document storage support for both JSON and XML. It is not always apparent whether JSON or XML is most suitable for a particular application. This article provides guidelines to help you select XML or JSON. It includes examples of creating, querying, updating, and managing in both JSON and XML in DB2 for z/OS.
27 Mar 2014
Parallel processing of unstructured data, Part 2: Use AWS S3 as an unstructured data repository
See how unstructured data can be processed in parallel fashion. Leverage the power of IBM DB2 for Linux, UNIX and Windows to provide efficient highly scalable access to unstructured data stored on the cloud.
Also available in: Russian  
13 Mar 2014
RUNSTATS: What's new in DB2 10 for Linux, UNIX, and Windows
DB2 10.1 provides significant usability, performance, serviceability, and database administration enhancements for database statistics. In this article, learn about the significant performance enhancements to the RUNSTATS facility. Examples show how to take advantage of new features such as new keywords, index sampling options, enhancements to automatic statistics collection, and functions to query asynchronous automatic runstats work.
Also available in: Russian  
13 Feb 2014
Using R with databases
R is not just the 18th letter of the English language alphabet, it is a very powerful open source programming language that excels at data analysis and graphics. This article explains how to use the power of R with data that's housed in relational database servers. Learn how to use R to access data stored in DB2 with BLU Acceleration and IBM BLU Acceleration for Cloud environments. Detailed examples show how R can help you explore data and perform data analysis tasks.
Also available in: Russian  
06 Feb 2014
Parallel processing of unstructured data, Part 1: With DB2 LUW and GPFS SNC
Learn how unstructured data can be processed in parallel fashion -- within a machine and across a series of machines -- by leveraging DB2 Linux, UNIX, and Windows and GPFS SNC to provide efficient highly scalable access to unstructured data, all through a standard SQL interface. Realize this capability with clusters of commodity hardware, suitable for provisioning in the cloud or directly on bare metal clusters of commodity hardware. Scalability is achieved within the framework via the principle of computation locality. Computation is performed local to the host which has direct data access, thus minimizing or eliminating network bandwidth requirements and eliminating the need for any shared compute resource.
Also available in: Russian  
30 Jan 2014
Migrating from Sybase to DB2, Part 1: Project description
This article describes the processes and techniques used to migrate trigger code from Transact SQL (Sybase) into SQL PL (DB2). Part 1 describes the intended goal and scope of the project. Part 2 talks about the considerations and challenges we had to overcome to make the database vendor transparent to the application.
Also available in: Russian  
16 Jan 2014
What's new in InfoSphere Workload Replay for DB2 for z/OS v2.1
InfoSphere Optim Workload Replay for DB2 for z/OS (Workload Replay) extends traditional database test coverage. Now you can capture production workloads and replay them in your test environment without the need to set up a complex client and middle-ware infrastructure. In October 2013, version 2.1 of Workload Replay was released, with key enhancements that we describe in this article.
19 Dec 2013
DB2 Advanced Copy Services: The scripted interface for DB2 Advanced Copy Services, Part 3
The IBM DB2 Advanced Copy Services (DB2 ACS) support taking snapshots for backup purposes in DB2 for Linux, UNIX and Windows databases. You can use the DB2 ACS API either through libraries implemented by your storage hardware vendors (wheras until now, only some do) or you can implement this API yourself which however, involve a high effort. This changes with IBM DB2 10.5.
07 Nov 2013
Licensing distributed DB2 10.5 servers in a high availability (HA) environment
Are you trying to license your IBM DB2 Version 10.5 for Linux, UNIX, and Windows servers correctly in a high availability environment? Do you need help interpreting the announcement letters and licenses? This article explains it all in plain English for the DB2 10.5 release that became generally available on June 14, 2013.
Also available in: Chinese   Japanese  
04 Nov 2013
Compare the distributed DB2 10.5 database servers
In a side-by-side comparison table, the authors make it easy to understand the basic licensing rules, functions, and feature differences among the members of the distributed DB2 10.5 for Linux, UNIX, and Windows server family as of June 14, 2013.
Also available in: Chinese   Japanese  
04 Nov 2013
DB2 editions: Which distributed edition of DB2 10.5 is right for you?
Learn the details of what makes each edition of IBM DB2 10.5 for Linux, UNIX, and Windows unique. The authors lay out the specifications for each edition, licensing considerations, historical changes throughout the DB2 release cycle, and references to some interesting things that customers are doing with DB2. This popular article will be updated during the release with any intra-version licensing changes that are announced in future fix packs.
Also available in: Chinese   Japanese  
03 Nov 2013
DB2 Linux, Unix and Windows HADR Simulator use case and troubleshooting guide
Although DB2 high availability disaster recovery (HADR) is billed as a feature that's easy to set up, customers often have problems picking the right settings for their environment. This article is a use case, and it shows how you can use the HADR simulator tool to configure and troubleshoot your HADR configuration in a real-world scenario. Using the examples and generalized guidance that this article provides, you should be able to test your own setups and pick the optimal settings.
17 Oct 2013
DB2 Advanced Copy Services: The scripted interface for DB2 Advanced Copy Services, Part 2
The DB2 Advanced Copy Services supports taking snapshots for backup purposes in DB2 for Linux, UNIX and Windows databases. Customers can use the DB2 ACS API either through libraries implemented by their storage hardware vendors or implement this API on their own. Additionally, it requires a high degree of effort for customers to implement. This changes with IBM DB2 10.5.
10 Oct 2013
Why low cardinality indexes negatively impact performance
Low cardinality indexes can be bad for performance. But, why? There are many best practices like this that DBAs hear and follow but don't always understand the reason behind. This article will empower the DBA to understand the logic behind why low cardinality indexes can be bad for performance or cause erratic performance. The topics that are covered in this article include B-tree indexes, understanding index cardinality, hypothetical examples of the effects of low cardinality indexes, a real-world example of the effects of a low cardinality index, and tips on how to identify low cardinality indexes and reduce their impact on performance.
26 Sep 2013
DB2 with BLU Acceleration: A rapid adoption guide
You have probably heard how DB2 with BLU Acceleration can provide performance improvements ranging from 10x to 25x and beyond for analytical queries with minimal tuning. You are probably eager to understand how your business can leverage this cool technology for your warehouse or data mart. The goal of this article is to provide you with a quick and easy way to get started with BLU. We present a few scenarios to illustrate the key setup requirements to start leveraging BLU technology for your workload.
19 Sep 2013
DB2 SQL development: Best practices
Most relational tuning experts agree that the majority of performance problems among applications that access a relational database are caused by poorly coded programs or improperly coded SQL. This article provides a reference for developers who need to tune an SQL statement or program. Most times, the slowness is directly related to how you design your programs or structure your SQL statements. This article gives you something to fall back on before calling DBAs or others, to try to improve the performance issue(s) at hand first.
Also available in: Chinese  
15 Aug 2013
Use Optim Data Tools to get the most out of BLU Acceleration
BLU Acceleration is an exciting new feature in IBM DB2 10.5 that can speed up complex analytic workloads tremendously. Workloads run faster without the need for tuning. At the heart of this new technology is the column-organized format for user tables. It's easy to create and load tables in the new column-organized format, as is ongoing maintenance because there is no need for indexes or tuning materialized query tables (MQTs). This article walks you through three scenarios that illustrate how to use Data Studio and IBM InfoSphere Optim Query Workload Tuner (OQWT) with the new BLU Acceleration feature.
Also available in: Chinese   Russian  
08 Aug 2013
DB2 Advanced Copy Services: The scripted interface
The DB2 Advanced Copy Services supports taking snapshots for backup purposes in DB2 for Linux, UNIX and Windows databases. Customers can use the DB2 ACS API either through libraries implemented by their storage hardware vendors or implement this API on their own. Additionally, it requires a high degree of effort for customers to implement the C-API of DB2 ACS.
Also available in: Chinese  
01 Aug 2013
Implementing disaster recovery in IBM PureData System for Transactions
Learn how to set up and execute disaster recovery for DB2 V10.5 databases on the IBM PureData System for Transactions. The solution is based on the DB2 High Availability and Disaster Recovery feature.
Also available in: Russian  
31 Jul 2013
Deploy and explore the DB2 10 pureScale Feature on WebSphere Application Server V8
The IBM DB2 pureScale Feature is designed for continuous availability and tolerance of both planned maintenance and unplanned accidental component failure. DB2 pureScale is a separately priced feature for both IBM DB2 Enterprise Server Edition and DB2 Advanced Enterprise Server Edition. This article describes how to deploy the DB2 10.1 pureScale Feature with IBM WebSphere Application Server (WAS) V8.0.0.1, and also explores the client reroute and workload balancing (WLB) capabilities by using a WAS application. We also examine how a DB2 pureScale cluster recovers from a failure and the impacts on WAS applications. You can apply the information from this article to WAS V8.5.
Also available in: Chinese  
25 Jul 2013
Load and import error checking for ETL users in DB2 for Linux, UNIX, and Windows
This article demonstrates how to check LOAD and IMPORT operations through ETL calls to SYSPROC.ADMIN_CMD in a DB2 for Linux, UNIX, and Windows database partitioning (DPF) environment. Using ETL calls, you can accomplish error checking with more control and precision than most ETL tools provide.
Also available in: Chinese   Russian  
11 Jul 2013
Optimizing RUNSTATS in DB2 for Linux, UNIX, and Windows: Troubleshooting index fragmentation
Accurate database statistics allow the DB2 query optimizer to determine efficient access plans. Whether you manage statistics collection yourself or use DB2's automatic statistics collection facility, a slow RUNSTATS can be a problem. In this article, you will learn how to assess if index fragmentation is the root cause of a slow RUNSTATS.
Also available in: Chinese   Russian  
11 Jul 2013
DB2 JSON capabilities, Part 3: Writing applications with the Java API
DB2 JSON enables developers to write applications using a popular JSON-oriented query language created by MongoDB to interact with data stored in IBM DB2 for Linux, UNIX, and Windows or IBM DB2 for z/OS. This driver-based solution embraces the flexibility of the JSON data representation within the context of a RDBMS with well-known enterprise features and quality of service. This DB2 NoSQL capability supports a command-line processor, a Java API, and a wire listener to work with JSON documents. The DB2 JSON Java API is the backbone of the command-line processor and the wire listener, and supports writing custom applications. The article introduces basic methods with a sample Java program and discusses options to optimize storing and querying JSON documents.
Also available in: Chinese   Japanese  
03 Jul 2013
DB2 JSON capabilities, Part 4: Using the IBM NoSQL Wire Listener for DB2
DB2 JSON enables developers to write applications using a popular JSON-oriented query language created by MongoDB to interact with data stored in IBM DB2 for Linux, UNIX, and Windows or IBM DB2 on z/OS. This driver-based solution embraces the flexibility of the JSON data representation within the context of a RDBMS with well-known enterprise features and quality of service. This DB2 NoSQL capability supports a command-line processor, a Java API, and a wire listener to work with JSON documents. In this article, the IBM NoSQL Wire Listener for DB2 is introduced. It parses messages based on the MongoDB wire protocol. It thus enables using MongoDB community drivers, and the skills acquired when working with these drivers, to store, update and query JSON documents with DB2 as JSON store.
Also available in: Chinese   Japanese  
27 Jun 2013
Optimize DB2 10.5 for Linux, UNIX, and Windows performance using InfoSphere Optim Query Workload Tuner with the DB2 BLU accelerator feature
The new BLU Acceleration feature in IBM DB2 10.5 for Linux, UNIX, and Windows can help improve the performance of your workload by converting row-organized tables to column-organized tables. However, the challenge is to know what tables could be converted and how much performance would improve. In this step-by-step article, you will learn how to use Optim Query Workload Tuner to perform column organization conversion, analyze what-ifs, and improve the performance of your workload.
27 Jun 2013
Performance considerations of the DB2 for Linux, UNIX, and Windows stored procedure ADMIN_MOVE_TABLE
This article describes performance considerations for IBM DB2 for Linux, UNIX, and Windows stored procedure ADMIN_MOVE_TABLE in a SAP system environment. We will examine tables with the characteristics of typical SAP systems.
27 Jun 2013
DB2 JSON capabilities, Part 1: Introduction to DB2 JSON
DB2 JSON enables developers to write applications using a popular JSON-oriented query language created by MongoDB to interact with data stored in IBM DB2 for Linux, UNIX, and Windows or in IBM DB2 for z/OS. This driver-based solution embraces the flexibility of the JSON data representation within the context of an RDBMS, which provides established enterprise features and quality of service. This DB2 JSON capability supports a command-line processor, a Java API, and a wire listener to work with JSON documents. In this article, get an introduction to the DB2 JSON technology.
Also available in: Chinese   Japanese  
20 Jun 2013
DB2 JSON capabilities, Part 2: Using the command-line processor
Rapidly changing application environments require a flexible mechanism to store and communicate data between different application tiers. JSON (Java Script Object Notation) has proven to be a key technology for mobile, interactive applications by reducing overhead for schema designs and eliminating the need for data transformations. DB2 JSON enables developers to write applications using a popular JSON-oriented query language created by MongoDB to interact with data stored in IBM DB2 for Linux, UNIX, and Windows or IBM DB2 for z/OS. This driver-based solution embraces the flexibility of the JSON data representation within the context of a RDBMS, which provides established enterprise features and quality of service. This DB2 NoSQL capability supports a command-line processor, a Java API, and a wire listener to work with JSON documents. In this article, you will set up a DB2 database to support NoSQL applications and walk through a scenario that introduces basic features of the DB2 JSON command-line processor to help you get started with your own applications.
Also available in: Chinese   Japanese  
20 Jun 2013
Snapshot monitoring administrative views on DB2 version 10.1 for Linux, UNIX, and Windows
This article demonstrates some of the important and frequently used DB2 snapshot monitoring administrative views in version 10.1. This article is for DB2 database administrators tasked with DB2 monitoring. Snapshot monitoring views are now the preferred means of accessing snapshot data, which represents a huge leap forward by giving administrator access to snapshot data via SQL. All of the information that database administrators have been used to getting from snapshots can be selected from the administrative views.
Also available in: Chinese  
13 Jun 2013
Secure Sockets Layer (SSL) support in DB2 for Linux, UNIX, and Windows
Using Secure Sockets Layer (SSL) with IBM DB2 means your data can be sent securely over the network. In this article, learn how to configure this protocol for DB2 V9.7 and newer releases.
Also available in: Chinese  
13 Jun 2013
Backup and restore procedures for the DB2 instance shared directory in a DB2 pureScale environment
In this article, learn about the recovery procedure for a DB2 pureScale instance shared directory (sqllib_shared). By following the procedures described here, you should be able to restore a pureScale instance to its last backup state in the case where some or all files or directories within it become unavailable or unusable.
06 Jun 2013
A complete connectivity guide from InfoSphere Information Server to DB2 for i
IBM Information Server supports extracting from and writing to DB2 for System i. To help you overcome any challenges in setting up the connection from Information Server to DB2 for i, this article provides clear, step-by-step instructions, from checking prerequisite information and components to connecting to DB2 for i and defining DataStage jobs.
Also available in: Vietnamese  
30 May 2013
DB2 10.x certification: Everything you need to know
Certification has long been a popular trend in the Information Technology (IT) industry. Consequently, many hardware and software vendors, including IBM, now have certification programs in place that are designed to evaluate and validate an individual's proficiency with their product offerings. But as a DB2 professional, should you become certified? Will being certified increase your ability to administer DB2 databases? Or advance your career? This article is designed to answer these and other questions; it can help you decide if DB2 certification is right for you, and it will show you the path to follow should you decide to acquire one or more of the DB2 certifications that are currently available.
30 May 2013
Online DB2 for z/OS migration
Increasingly, customers must keep their applications online and available all hours of every day, 24X7. Fortunately, the DB2 migration process has been designed specifically to allow the business application set to continue to run while you migrate. This article provides hints and tips to make your online migration successful.
Also available in: Russian  
16 May 2013
DB2 10: Run Oracle applications on DB2 10 for Linux, UNIX, and Windows
IBM DB2 10 for Linux, UNIX, and Windows has out-of-the-box support for Oracle's SQL and PL/SQL dialects. This allows many applications written against Oracle to execute against DB2 virtually unchanged. In this article, get a high-level overview of what Oracle compatibility means in DB2. Whether you want to switch your custom application to DB2 or extend your DBMS vendor support to DB2, now is your time.
Also available in: Chinese   Korean   Russian   Vietnamese   Portuguese   Spanish  
08 May 2013
Restricting database connections using the CONNECT_PROC database configuration parameter in DB2 for Linux, Unix, and Windows
System administrators are responsible for, among other things, protecting a database against unauthorized access or misuse by authorized database users (for example, inappropriate access to sensitive information within a database). A common requirement to mitigate such risks is ensuring that users are allowed to connect to the database only from a list of trusted hosts or IP addresses that are known to be secure. This article gives a practical example of how such a requirement can be put in practice by making use of the CONNECT_PROC database configuration parameter of IBM DB2 for Linux, UNIX, and Windows.
02 May 2013
Get the most out of DB2 optimizer: Leveraging statistical views to improve query execution performance
Statistical views provide the necessary sophisticated statistics to the optimizer to more accurately model complex relationships. In this article, you learn through examples how to identify these complex relationships and create statistical views to allow the optimizer to compute more accurate cardinality estimates.
Also available in: Chinese  
02 May 2013
Verify DB2 Net Search Extender indexes using the NSE Index Verification tool
DB2 Net Search Extender, here after called NSE, is an IBM DB2 extender providing full text search support in DB2. NSE searches documents stored in columns of database tables by maintaining its internal text indexes. Rather than searching sequentially through text documents stored in database columns at query time, NSE uses its text indexes to search in an efficient manner. Verification of NSE indexes are vital because the errors reported by the top layer applications on full text index can be misleading. This unnecessarily delays the problem resolution at the production system. To prevent such a situation, the NSE Index Verification tool was developed to verify the NSE index validity and consistency, and to check whether or not indexes are valid.
Also available in: Chinese  
25 Apr 2013
DB2 pureScale Feature
The DB2 pureScale Feature keeps your distributed database system available 24x7. WLB, ACR, and client affinities provide uninterrupted service during both planned and unplanned outages. If a member fails, applications are automatically rerouted to other DB2 members. When the failed member comes back online, applications are transparently routed to the restarted member. With the DB2 pureScale Feature, scaling your database solution to meet the most demanding business needs is easy.
25 Apr 2013
What's new in DB2 10.5 for Linux, UNIX, and Windows
This article outlines the key features and enhancements in IBM DB2 10.5 for Linux, UNIX, and Windows. To be released in June, this latest version delivers a wide range of new function that directly addresses your business needs in the areas of cost reduction, application performance, productivity, and reliability.
Also available in: Chinese  
23 Apr 2013
Introduction to the DB2 Continuous Data Ingest feature
IBM DB2 10.1 for Linux, Unix and Windows has introduced the Continuous Data Ingest feature. The INGEST command provides an alternative to the known methods of previous DB2 versions: IMPORT and LOAD. In this article you will understand the main Ingest concepts and find examples and situations where this tool will help you to populate your databases.
Also available in: Russian  
18 Apr 2013
Accelerating batch processing with IBM DB2 Analytics Accelerator
This article provides an overview of the benefits that a company can achieve by introducing IBM DB2 Analytics Accelerator in their batch processing systems. The example given is based on real implementations done at Swiss Re, a major re-insurance company based in Zurich, Switzerland.
Also available in: Chinese   Russian  
16 Apr 2013
Simplify backup and recovery with IBM DB2 Merge Backup for Linux, UNIX, and Windows
It is important to have an up-to-date and consistent backup available so that you can speed database recovery times. IBM DB2 Merge Backup for Linux, UNIX and Windows gives you alternative strategies to eliminate the need to take regular DB2 full backups and instead use multiple delta and incremental backups to build a new full backup copy that is fully recognized by DB2. This step-by-step article introduces you to IBM DB2 Merge Backup and teaches you how to create merge backups using the control file structure in IBM DB2 Merge Backup.
Also available in: Chinese  
28 Mar 2013
Zigzag join enablement for DB2 star schema queries
IBM DB2 10.1 Linux, UNIX, and Windows introduces a new join method called zigzag join. Zigzag join improves consistency in performance as well as reduces the execution time of queries in data warehouse or data mart environments with large volumes of potentially partitioned data, complex ad hoc queries, and where database design uses a star schema. This article provides insight into the eligibility criteria of selecting the zigzag plan, how the zigzag join method works, using a zigzag join with a gap in the fact table multi-column index, using the ZZJOIN operator, and using the index advisor for zigzag join.
Also available in: Chinese  
21 Mar 2013
DB2 Tools corner: Using IBM Tools Customizer for z/OS in a multiple-LPAR environment
Although Tools Customizer currently supports only the local LPAR, you can use several methods to customize products on multiple LPARs where Tools Customizer is not installed.
Also available in: Russian  
14 Mar 2013
Capture and store DB2 performance data in an easy way
Did you ever wonder how you can collect performance data about your DB2 system in a simple way without using extra tools? In this article, learn how to leverage the new DB2 for Linux, UNIX, and Windows monitoring framework available in V10.1 (initially introduced in version 9.7). The article also explains how to combine DB2 utilities to select, capture, and store data that you can use for analysis with plain SQL or using BI tools.
Also available in: Chinese   Russian   Vietnamese  
14 Mar 2013
A guided tour to IBM Database Patterns, Part 4: Provision and manage your database using the REST API and command-line interface
IBM Database Patterns provides solutions to easily provision and manage databases on IBM Workload Deployer (IWD) in a private cloud. IWD is a cloud management appliance that delivers a patterns-based approach to deploy and manage application environments in the cloud. The REST API and command-line interface enables you to use IBM Database Pattern in batch processing with no GUI, thereby allowing it to be mashed up into existing applications and user interfaces.
Also available in: Russian  
07 Mar 2013
Choice of SUPERASYNC mode for disaster recovery using DB2 HADR
DB2 High Availability Disaster Recovery (HADR) is an easy-to-use data replication feature of IBM DB2 for Linux, UNIX, and Windows that provides a high availability (HA) solution for both partial and complete site failures. Beginning with DB2 V9.5 Fix Pack 8 and DB2 V9.7 Fix Pack 5, a new HADR sync mode called SUPERASYNC has been introduced. This article explains the purpose of SUPERASYNC mode, the deployment of a HADR pair using this mode, as well as standby state transition in this mode. In addition, it includes use case scenarios that explain the implementation of SUPERASYNC mode for disaster recovery. It will also look at how Primary will overcome the back pressure and perform better in case of single or multiple standby, and what the benefits and drawbacks are from using this mode.
Also available in: Chinese  
14 Feb 2013
What's new in RDF application development in DB2 10.1 Fix Pack 2
Beginning with DB2 10.1 for Linux, UNIX, and Windows, DB2 has supported RDF data and SPARQL application development. In this article, learn about important enhancements for RDF application development that were added in DB2 10.1 Fix Pack 2.
07 Feb 2013
Configure Data Facility Storage Management Subsystem for DB2 10 for z/OS installation
Installation of DB2 10 requires configuring z/OS Storage Management Subsystem (SMS) for DB2 system objects, and migrating the system data sets to SMS to exploit its benefits. Since the migration to DB2 10 is possible from DB2 8, some customers, upon reaching DB2 10 new-function mode (NFM), can benefit from many features related to z/OS SMS, including those introduced in DB2 9. This article will help you in reorganizing DB2 catalog and directory objects.
07 Feb 2013
Road map to real-time monitoring in DB2 for Linux, UNIX, and Windows
Are you wondering where to find the information you need to learn about and start using the real-time monitoring information available in the DB2 for Linux, UNIX, and Windows product? This article sets out a path through the documentation that will help you deal with this question by providing direct links to the appropriate topics in the Information Center.
Also available in: Russian  
07 Feb 2013
Save energy with the DB2 10.1 for Linux, UNIX, and Windows data compression feature
The DB2 for Linux, UNIX, and Windows data compression feature allows you to store your data in a compact form. There are two known benefits of this approach: first, reduction of storage space, and second, improvement of performance. In this article we describe a case study showing the third benefit: reduction of electricity consumption per unit of work. As a result, data compression reduces the cost of database maintenance and makes your database greener.
Also available in: Russian   Spanish  
07 Feb 2013
Choosing partitioning keys in DB2 Database Partitioning Feature environments
Choosing proper partitioning keys is important for optimal query performance in IBM DB2 Enterprise Server Edition for Linux, UNIX, and Windows environments with the Database Partitioning Feature (DPF). To help with this task, this article provides new routines to estimate data skews for existing and new partitioning keys. The article also details best practices and shows how to change a partitioning key while keeping the table accessible.
Also available in: Russian  
04 Feb 2013
Using DB2 for z/OS pureXML to process SEPA transactions
Single Euro Payments Area (SEPA) is a payment integration mechanism widely used in Europe to handle standard payment messages. Each SEPA document can contain up to 100,000 credit transfer transactions and must be processed accurately in a short period of time. This article outlines the author's experience in performing a benchmark for a large European corporate and investment bank using DB2 for z/OS pureXML for SEPA (ISO 20022). Learn how the team resolves obstacles and eventually achieves their performance goal.
31 Jan 2013
DB2 pureScale disaster recovery using Storwize V7000 Metro Mirror
The DB2 pureScale feature leverages the IBM Storwize V7000 storage system synchronous remote copy function like Metro Mirror to maintain an identical copy on both the primary and secondary volumes for the disaster recovery purposes. The Metro Mirror features enable you to set up a relationship between two volumes, so that updates that are made by an application to one volume are mirrored on the other volume. The volumes can be in the same system or on two different systems. Read on to learn the steps required to deploy a Metro Mirror solution with the Storwize V7000 storage subsystem.
31 Jan 2013
Using section explain in InfoSphere Optim Query Workload Tuner for DB2 for Linux, UNIX, and Windows 3.2
Take advantage of the section explain feature in DB2 for Linux, UNIX, and Windows 9.7.1 and later when you tune SQL with InfoSphere Optim Query Workload Tuner 3.2.
24 Jan 2013
Utilizing the DB2 HADR reads on standby feature in a business intelligence environment
The DB2 High Availability and Disaster Recovery (HADR) feature is a database replication method that provides a high availability solution for both partial and complete site failures. HADR protects against data loss by replicating data changes from a source database, called the Primary, to a target database, called the Standby. The HADR reads on standby (HADR ROS) feature, allows read only applications to access either the HADR Primary or the HADR Standby database. This enables an organization to offload some of the read-only workloads running on the Primary to the Standby database. This paper shows a practical application of this HADR ROS feature in conjunction with Virtual IP addresses to ensure continued, automatic connectivity in an Business Intelligence Environment.
24 Jan 2013
Resource description framework application development in DB2 10 for Linux, UNIX, and Windows, Part 1: RDF store creation and maintenance
The Resource Description Framework (RDF) is a family of W3 specification standard that enables the exchange of data and metadata. Using DB2 10 for Linux, UNIX, and Windows Enterprise Server Edition, applications can store and query RDF data. This tutorial walks you through the steps of building and maintaining a sample RDF application. During this process you will learn hands-on how to use DB2 software in conjunction with RDF technology.
Also available in: Chinese  
23 Jan 2013
Deploying DB2 pureScale with IBM Storwize V7000 6.4.0.1
A key aspect to the DB2 pureScale solution lies around the capabilities of the underlying storage. In addition to that, DB2 pureScale takes advantage of specific storage capabilities to enhance the solution. This paper will take you through the value proposition of DB2 pureScale on IBM Storwize V7000 storage demonstrating a solution that meets the needs of even the most demanding businesses.
Also available in: Chinese  
10 Jan 2013
Tips for using SQL to query foreign key relationships
This article discusses how to write SQL queries to find foreign key relationships in IBM DB2 for Linux, UNIX, and Windows database. Given a table with a primary key, you will learn how to return the children and descendant tables, as well as the referential integrity (RI) relationship paths from the parent table to these children and descendants. Also, you will see how the query can be modified to return the results for all tables in the database.
Also available in: Chinese   Russian  
10 Jan 2013
Configuring DB2 pureScale for backup and restore using Storwize V7000 V6.4.0.1 FlashCopy
The DB2 pureScale feature leverages the IBM Storwize V7000 storage system FlashCopy services to mitigate critical requirements from the customer in an extremely efficient manner. The FlashCopy function enables you to make point-in-time, full volume copies of data, with the copies immediately available for read or write access. This article describes the steps required to deploy a FlashCopy solution with the Storwize V7000 storage subsystem.
Also available in: Chinese  
03 Jan 2013
Sybase to DB2 migration, Part 4: Issues and resolutions
Information assets are key to day-to-day business. They are also a huge source of institutional value and intellectual property that must be preserved, extended, and repurposed as the systems underpinning them change. Given the current business environment, migration has taken on strategic importance for a number of reasons. This article helps you to understand and map various features and data types of Sybase and DB2.
Also available in: Chinese  
20 Dec 2012
Manage spatial data with IBM DB2 Spatial Extender, Part 2: Implementing typical spatial use cases
This "Manage spatial data with IBM DB2 Spatial Extender" series of tutorials takes you through common tasks that work with spatial data in the DB2/reg> Spatial Extender. These tasks include importing and creating spatial data, constructing and executing spatial queries, working with IBM spatial tools, working with third-party and open source software, improving application performance, and taking special considerations in a data warehouse environment.
13 Dec 2012
Sybase to DB2 migration, Part 3: Test strategy
Information assets are key to day-to-day business. They are also a huge source of institutional value and intellectual property that must be preserved, extended, and repurposed as the systems underpinning them change. Given the current business environment, migration has taken on strategic importance for a number of reasons. This article helps you to understand various processes, verifications, and validations of post database migration.
Also available in: Chinese  
13 Dec 2012
Data mining techniques
Examine different data mining and analytics techniques and solutions. Learn how to build them using existing software and installations.
Also available in: Russian   Vietnamese  
11 Dec 2012
Configure FIPS mode for DB2 and WebSphere
Learn the necessary steps to configure an application to be compliant with the US Federal Information Processing Standard (FIPS). The application in this article uses DB2 and WebSphere in a Windows system.
11 Dec 2012
Sybase to DB2 migration, Part 2: Integrity check guidelines
Information assets are key to day-to-day business. They are also a huge source of institutional value and intellectual property that must be preserved, extended, and re-purposed as the systems underpinning them change. Given the current business environment, migration has taken on strategic importance for a number of reasons. This article helps you to understand the integrity check process for various database objects while migrating the databases to DB2.
Also available in: Chinese  
06 Dec 2012
Set up DB2 for Linux, UNIX, and Windows for high availability using Microsoft Cluster Server
IBM DB2 for Linux, UNIX, and Windows has a number of options to provide high availability for production systems such as high availability and disaster recovery (HADR), DB2 pureScale, and DB2 MSCS. This article shows you how to set up a DB2 cluster in a virtual Microsoft Windows environment, including how to quickly set up a training and testing system in a virtual environment such as the cloud. This article will also help you to learn and practice db2MSCS without special hardware. Finally, simple troubleshooting methods are introduced to help you with common issues. This article is an update of a previously published white paper on ibm.com.
06 Dec 2012
Getting Started With Fit for Purpose Architectures
We are going to revisit Fit for Purpose architectures today. It has been encouraging to see how quickly customers have picked up the Fit for Purpose concept and how many are now thinking in terms of matching the compute problem to the best underlying compute paradigm.
04 Dec 2012
Migrating Data from a Mainframe to a Distributed Environment
The Data Movement Tool is easy to install and flexible to operate. It can be run from the command line or a GUI. Importantly, the Data Movement Tool allows the selection of objects that you want to copy. You can copy individual objects, entire database, objects by authID, or schema.
04 Dec 2012
Sybase to DB2 migration, Part 1: Process and methodology
Information assets are key to day-to-day business. They are also a huge source of institutional value and intellectual property that must be preserved, extended, and re-purposed as the systems underpinning them change. Given the current business environment, migration has taken on strategic importance for a number of reasons. The benefits of rationalizing processes and systems hinges on outcomes where services and functionality are as good or better than before, while free of costly redundancies or unnecessarily diverse technologies. Poorly executed migrations diminish these returns and fail to meet the "as good as or better than before" criteria.
Also available in: Chinese  
29 Nov 2012
Maintaining DB2 Analytics Accelerator in a DB2 for z/OS data sharing environment
The IBM DB2 Analytics Accelerator (IDAA) is a workload optimized appliance that uses both System z and Netezza technologies. In this article, learn how to maintain IDAA in configurations other than the standard configuration of connecting a single IDAA to a single DB2 subsystem or to a single member of a DB2 data sharing group.
29 Nov 2012
Mining your package cache for problem SQL in DB2 for Linux, UNIX, and Windows
In both OLTP and DSS database environments, DBAs can use information stored in the package cache to find problematic SQL statements either before or after they begin to negatively impact performance. While there are many third party tools available that can be used to identify and analyze problematic SQL, by executing a few simple queries, DBAs can locate such SQL without having to use one of these tools. This article shows you how to mine package cache data using some of those queries.
Also available in: Russian   Portuguese  
21 Nov 2012
Shredding XML in DB2 with pureXML and XMLTable
DB2's XML processing capability makes it simpler to turn XML data into relational data. The built-in XMLTABLE function provides an easy-to-use and powerful mechanism to turn hierarchical XML data into parent-child relational data. Whether your tools do not support XML, or relational processing is required, XMLTABLE provides a means to bridge the gap.
Also available in: Russian  
15 Nov 2012
IBM federated database technology
In a large modern enterprise, information is almost inevitably distributed among several database management systems. Despite considerable attention from the research community, relatively few commercial systems have attempted to address this issue. This article describes the technology that enables clients of IBM's federated database engine to access and integrate the data and specialized computational capabilities of a wide range of relational and non­relational data sources.
Also available in: Russian   Japanese  
13 Nov 2012
Use IBM InfoSphere Optim Query Workload Tuner 3.1.1 to tune statements in DB2 for Linux, UNIX, and Windows, and DB2 for z/OS that reference session tables
IBM InfoSphere Optim Query Workload Tuner (OQWT) 3.1.1 can tune statements for IBM DB2 for Linux, UNIX, and Windows, and IBM DB2 for z/OS. This document describes how to use OQWT to tune a statement that accesses one or more session tables. Two methods are presented on how to set up the database environment for the session table such that OQWT 3.1.1 can tune statements using the table. Examples are provided for a script that is required to set up the environment, including example snapshots of the output and functionality of the applicable OQWT tuning features.
08 Nov 2012
Enable DB2 in OpenStack
OpenStack is a cloud operating system that controls large pools of compute, storage, and networking resources throughout a data center. All resources are managed through a dashboard that gives administrators control while empowering users to provision resources through a web interface. OpenStack supports MySQL, SQLite and PostgreSQL as its default databases. In this article, the author shows you how to quickly enable OpenStack to support DB2.
Also available in: Chinese   Russian   Japanese  
05 Nov 2012
Improve index analysis with DB2 10.1
One of the most challenging parts of index design is verifying that IBM DB2 is using a particular index in a way that was intended. Explain output for an SQL operation can show whether an index is being utilized, but it can be extremely difficult and time consuming to generate Explain data for every SQL statement found in an application. Not to mention the fact that looking for index usage in the volumes of Explain data that such an endeavor might produce would be extremely tedious. Furthermore, many applications use dynamic SQL that is generated on-the-fly, which means that one or more SQL statements coded in an application can have hundreds or even thousands of variations. And each variation can result in a different data access path, with some utilizing available indexes and others relying solely on table scans. This article is designed to introduce you to an object and a set of new table functions that can be used to analyze index usage in DB2 10.1 for Linux, UNIX, and Windows databases.
Also available in: Russian  
01 Nov 2012
Boost JDBC application performance using the IBM Data Server Driver for JDBC and SQLJ
Developing high performing JDBC applications is not an easy task. This article helps you gain a better understanding of the factors that contribute to your JDBC application performance using the IBM Data Server Driver for JDBC and SQLJ to access DB2 and Informix. Learn to identify these issues and to find and alleviate client-side bottlenecks.
01 Nov 2012
Analyze DB2 spatial data with a free geobrowser
A geobrowser for DB2, Informix and Netezza is now available as a free download. You can easily list tables containing spatial data and select the tables to be displayed as a map using a combination of points, lines and polygons. The color, symbols, linestyle and shading are user selectable. Map navigation tools allow you to zoom in and out, pan the map and select and display the alphanumeric values associated with each graphic object. The geobrowser can render the results of spatial analysis using DB2, Informix or Netezza. Application developers can use these components to construct custom spatial visualization applications. This tutorial shows you step-by-step how to use the free geobrowser to visualize data from DB2 tables.
Also available in: Chinese   Vietnamese   Portuguese  
01 Nov 2012
Adopting temporal tables in DB2, Part 2: Advanced migration scenarios for system-period temporal tables
The temporal capabilities in IBM DB2 Version 10 provide powerful tools for time-based data management. At the core of the temporal features in DB2 are three types of temporal table: system-period temporal tables, application-period temporal tables, and bitemporal tables. This articles series explains how to migrate existing tables and temporal solutions to temporal tables in DB2. Part 1 of the series has described basic scenarios for adopting system-period temporal tables in DB2. In this second part we discuss three additional and slightly more advanced scenarios for migrating to system-period temporal tables.
Also available in: Chinese  
25 Oct 2012
Virtualize the IBM DB2 pureScale Feature on Linux using Kernel-based Virtual Machine
Learn how you can improve your return on investment when you deploy the IBM DB2 pureScale Feature with Linux on IBM System x servers. Modern System x servers have an ample number of cores and amount of memory and I/O capability. By using virtualization technology, you can deploy multiple DB2 pureScale instances on a common infrastructure and achieve greater efficiency.
Also available in: Chinese   Portuguese  
25 Oct 2012

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