By Dwaine R. Snow, Thomas Xuan Phan
Now, there is a definitive advisor to complex DB2 UDB database management that still gives you the entire intensity and perception you must organize for the harsh new IBM examination. immediately from the DB2 specialists at IBM, this ebook bargains systematic and authoritative assurance of each examination aim and may function a reference once you have handed the test.For the 1st time, this ebook brings jointly IBM most sensible practices, innovations, counsel, instructions, and principles of thumb for nearly each point of complex DB2 UDB v8 database administration-including all this and more:Ability to layout, create, and deal with desk spacesAbility to layout, create, and deal with buffer poolsWhen and the way to use parallelism in DB2 UDBConfiguring federated database accessDesigning and imposing a backup and restoration strategyAbility to enforce a standby databaseMonitoring and tuning DB2Using and coping with tables with multidimensional clusteringDesigning and configuring a number of database partitionsImplementing authentication and encryption on a wide scaleLeveraging parallelism and symmetric multiprocessingPreparing for and executing restoration in an company environmentRapid restoration within the occasion of desk area or desk point disastersEffective tracking and challenge determinationMaximizing functionality and scalability
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Extra info for Advanced DBA Certification Guide and Reference for DB2 UDB v8 for Linux, Unix and Windows
There are no partition group design considerations if you are using a nonpartitioned database. If the database is partitioned, the function and data can then be distributed among all of the database partitions in the DB2 instance. 12. cfg. cfg). 59 60 Partition Group Classes There are two classes of partition groups: one is based on the number of database partitions in the partition group and another based on how the partition group is created. Single- and Multi-Partition Partition Groups There are two types of partition groups, depending on the number of database partitions that the partition group contains.
10, the high water mark is at page 70; however, there are 20 pages (two extents) of empty space below the high water mark. The table space high water mark could be lowered by reorganizing an existing table or by exporting an existing table, dropping it, recreating the table, then importing or loading the data into the new table. However, in both of these cases, it is important to know which object is holding the high water mark so that it can be reorganized or unloaded/dropped/loaded. This information can be found using DB2DART with the /DHWM option.
Before the rebalance process starts, DB2 must first build a new table space map to reflect the changes made to the table space. ) The current table space map is the original table space map as it existed prior to making the container changes with the ALTER TABLESPACE statement. The rebalancer will move extents from their location in the current table space map to the location in the new table space map. For a forward rebalance, the rebalancer will start at the first extent for the table space (Extent 0) and will move the data one extent at a time until the extent holding the high water mark for the table space has been moved.