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revenue at IBM for several decades and still make up the lion s share of its software business. Two older, nonrelational mainframe database products IMS, a hierarchical DBMS, and DL/1 (Data Language/1), a hierarchical database access method still contribute to IBM s sales, but SQL-based relational products dominate: DB2 for z/OS is IBM s flagship relational DBMS product. It is a large, complex software product that runs on IBM mainframe systems under the z operating system (successor to OS/390 and its ancestor, MVS). This product supports some of the largest transaction processing databases in the world and offers the broadest feature set of IBM s database products, spanning very high-performance transaction processing, data warehousing, and tightly integrated XML support. DB2 for Linux, UNIX, and Windows is a database management system for server systems from departmental scale up to the largest UNIX-based server clusters that power large corporate data centers. Like its mainframe counterpart, it integrates relational and XML data. For a time the product was named DB2 Universal Database (UDB) to distinguish it from the mainframe version of DB2, which was built on a different code base. The software comes in several editions. An entry-level Express Edition is available at no charge to compete with open source databases. A midrange Workgroup Edition has features tailored for departmental systems. The Enterprise Edition provides full functionality approaching that of mainframe DB2. DB2 Everywhere extends the DB2 family to support mobile devices and embedded database applications. In addition to its data management capabilities, this edition of DB2 provides support for occasionally connected environments with its data synchronization features. DB2 Everywhere competes with Sybase s SQL Anywhere, which dominates the mobile market segment. Informix was acquired by IBM in 2001 after two decades of establishing itself as one of the most innovative databases on UNIX-based systems. One of the earliest UNIXbased databases, the Informix product was rewritten to support SQL in 1985 and was among the first to fully take advantage of the SMP UNIX servers that dominated the 1990s. In 1995, Informix acquired Illustra, a pioneering object/ relational database vendor, making it the first major SQL database vendor to embrace the object/relational trend. Challenges with the Illustra acquisition and internal management problems stalled the company s growth in the late 1990s, and IBM acquired it primarily for its user base of over 100,000 customers. IBM continues to support and enhance the Informix product as a UNIX-based OLTP database. SolidDB is an in-memory relational database that IBM acquired in early 2008. At this writing, IBM offers the product in two editions. IBM SolidDB is a persistent inmemory stand-alone database that provides extremely low-latency database access for real-time transaction-processing applications. IBM SolidDB Universal Cache uses the solid technology as an in-memory cache that accelerates the performance of a range of disk-based RDBMSs. IBM s announced direction is to more tightly integrate the SolidDB into its mainstream database product family. These IBM database products are part of a much broader IBM family of infrastructure software products that has been built through a combination of IBM development and acquisition. The WebSphere family enjoys a large market share in the application server
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Part VII:
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market, and Cognos (acquired in late 2007) holds a similar position in the business intelligence market. Along with hundreds of other products, these compose a product family that allows IBM to offer one-stop shopping for key software products to the largest IT shops in the world.
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Ingres Corporation (Ingres)
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The Ingres database traces its origins to one of the earliest relational database prototypes, built at the University of California at Berkeley. The original Berkeley Ingres code was readily available at low cost, and several Berkeley students and professors formed a company, Relational Technology, Inc. (later renamed Ingres Corporation), to produce a commercial version. During the early and middle 1980s, the Ingres DBMS and its QUEL database language was a major rival to SQL, and there was a particularly strong competitive rivalry between Ingres and Oracle in the midrange DBMS market. When SQL emerged as the standard database language, Relational Technology adapted Ingres to support both QUEL and SQL. Ingres was first implemented on Digital minicomputers and enjoyed early success in the academic community, but the center of gravity moved to UNIX-based and later Linux-based platforms, where it remains today. Ultimately, Ingres created a substantial and loyal installed base, but lost the database wars to Oracle. The company was acquired by ASK, a maker of manufacturing applications software, in the early 1990s. Four years later, the combined ASK/Ingres was acquired by Computer Associates (CA), which had perfected a business model of acquiring out-of-favor software products with large installed bases. CA continued to enhance the product for the next decade, but ultimately decided to release it as an open source database product in 2004. This gave the product a new lease on life, as it now presented a powerful, very mature database product available at very low cost. CA partnered with a private equity firm to form a new company, Ingres Corporation, to provide support and services for the open source Ingres. Ingres Corporation touts the advantages of today s Ingres as high security, high availability, high scalability, and high performance. In addition to the Ingres database, the company offers an integrated Ingres+Linux software package (a software appliance ), a set of development environments, and a database middleware product that integrates across underlying Oracle SQL Server, DB2, and Ingres databases.
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Intersystems (Cach )
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Intersystems touts its Cach database as the world s fastest object database. The origins of both the company and the product go all the way back to the 1960s (before the advent of the relational database!) to a computer operating system and programming language named MUMPS (Massachusetts General Hospital Utility Multi-Programming System), developed at Massachusetts General Hospital. The system was designed for database-oriented applications, and achieved considerable popularity in the next two decades for health-care/ medical and financial information systems. The MUMPS system actually achieved the status of an ANSI standard in 1977, and Intersystems was founded as one of the leading suppliers of MUMPS software. The company eventually acquired many of its rivals and consolidated the acquired products under the Cach brand in the late 1990s. The code has, of course, undergone substantial enhancement and modification over the years. The Cach product is doubly positioned as an object-oriented database and a multidimensional data engine, and unlike most SQL-based products, it does not have a relational architecture at its foundation. However, SQL access to data plays a major role in
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Appendix B:
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