The IBM Information on Demand (IOD, for short) conference is rapidly approaching. The conference will be held in Las Vegas, Nevada the week of October 25 – 30, 2009 at the Mandalay Bay casino and hotel.The IOD conference is IBM’s signature event for their data and information management product lines. By attending IOD 2009 you can gain unique perspectives from IBM experts, technical leaders and visionaries as well as peers in your industry. Many of the developers of IBM’s offerings, such as DB2, Informix, and IMS, will be delivering educational...
Thursday, 30 July 2009
Friday, 24 July 2009
Monday, 6 July 2009
The "Dirty" Read (AKA Uncommitted Read)
Posted on 07:57 by Unknown
Anyone accustomed to application programming when access to a database is required understands the potential for concurrency problems. When one application program attempts to read data that is in the process of being changed by another, the DBMS must forbid access until the modification is complete in order to ensure data integrity. Most DBMS products, DB2 included, use a locking mechanism for all data items being changed. Therefore, when one task is updating data on a page, another task can not access data (read or update) on that same page...
Subscribe to:
Posts (Atom)
