By Dean Meltz, Rick Long, Mark Harrington, Robert Hain, Geoff Nicholls
IMS serves greater than ninety five percentage of Fortune a thousand businesses, manages 15,000,000 gigabytes of construction information, and helps greater than 2 hundred million clients in keeping with day. The brand-new IBM IMS model nine isn't just the world's number 1 platform for extraordinarily huge on-line transaction processing: it integrates with internet software server know-how to let tomorrow's strongest Web-based functions. Now, for the 1st time in lots of years, there is a thoroughly up to date advisor to figuring out IMS on your enterprise environment.An creation to IMS covers * fitting and configuring IMS model nine * realizing and enforcing the IMS hierarchical database version * figuring out and dealing with the IMS Transaction supervisor * gaining knowledge of middle software programming techniques, together with software constitution and IMS keep an eye on blocks * making the most of IMS nine Java programming improvements * operating with the IMS grasp Terminal * Administering IMS: approach definition, customization, logging, safeguard, operations, and extra * working IMS in a Parallel Sysplex(r) environmentWhether you might have spent a profession operating IMS otherwise you are encountering IMS for the 1st time, this e-book supplies the insights and talents you must be triumphant - as an software dressmaker, developer, or administrator.
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Additional info for An Introduction to IMS (TM): Your Complete Guide to IBM's Information Management System
In the event of a program failure, it might be necessary to take manual action (for example, submit jobs to run IMS utilities) to recover the databases to a consistent point. With online dependent application regions, this is done automatically by the IMS control region. You can also use DBRC to track the IMS logs and ensure that correct recovery action is taken in the event of a failure. An application can be written so that it can run in both a batch address space and a BMP address space without change.
The DLISAS allocates full-function database data sets and also contains some of the control blocks associated with database access and some database buffers. For a DBCTL environment, the DLISAS is required and always present. For a DB/DC environment, you have the option of having IMS database accesses performed by the control region or having the DB/DC region start DLISAS. For performance and capacity reasons, use DLISAS. DLISAS is not present for a DCCTL environment because the Database Manager functions are not present.
By midyear, IMS Version 7 surpassed IMS Version 6 as the most popular version, measured by number of licenses. Overall, the growth of net new IMS licenses remained positive, fueled largely by expansions required because of mergers and acquisitions among existing customers (in the Americas and Europe) and the selection of IMS for new zSeries® footprints (predominantly by emerging opportunities in Asia). It is noteworthy that customers showed continued confidence in the future of IMS during the years 20012003, when much of the rest of the IT industry was showing a downturn and retrenchment.
An Introduction to IMS (TM): Your Complete Guide to IBM's Information Management System by Dean Meltz, Rick Long, Mark Harrington, Robert Hain, Geoff Nicholls