By Dwaine R. Snow, Thomas Xuan Phan
Now, there is a definitive advisor to complicated DB2 UDB database management that still promises the entire intensity and perception you want to organize for the harsh new IBM examination. immediately from the DB2 specialists at IBM, this e-book bargains systematic and authoritative insurance of each examination target and may function a reference upon getting handed the test.For the 1st time, this e-book brings jointly IBM most sensible practices, thoughts, suggestions, instructions, and principles of thumb for nearly each element 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 enforcing 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 house or desk point disastersEffective tracking and challenge determinationMaximizing functionality and scalability
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Extra resources for Advanced DBA Certification Guide and Reference for DB2 UDB v8 for Linux, Unix and Windows
For the table space created using: CREATE TABLESPACE tblspc MANAGED BY DATABASE USING (FILE '/tblspcs/cont1' 50, FILE '/tblspcs/cont2' 40, FILE '/tblspcs/cont3' 40) EXTENTSIZE 10 The extent map would look like the following: The table space map would look like the following: Range Number   Stripe Set   Stripe Offset 0 0 Max Extent 8 9 Max Page 89 99 Start Stripe 0 3 End Stripe 2 3 Adj. Containers 0 0 3 (0, 1, 2) 1 (0) To free up disk space back to the file system, the third container in the table space could be dropped with the following command: ALTER TABLESPACE tblspc DROP (FILE '/tblspcs/cont3') This would remove the container from the existing stripe set and would produce an extent map as shown below.
Drop table T1. • Extents 3 and 4 will be freed up for reuse. • There will be four extents in use, which means that the total number of pages used by the tables would be 40. • The highest allocated page number in this table space is 69, which means that the high water mark is 70 (69 + 1). 10 illustrates the example above and shows the high water mark for the table space. As shown, Extents 3 and 4 are empty because the table (T1) was dropped and its extents freed up to be reused within the table space.
Cfg file can contain up to four columns on UNIX and Linux, and five columns on Windows. The first column identifies the partition number used to identify the partition within DB2. The second column is the TCP/IP hostname of the server where the instance is created. The third column is optional but must be used if there are multiple partitions on the same server. This column specifies the logical port for the partitions within the server. The fourth column is also optional and is used to identify the network interface to use for interpartition communication.