Dwaine R. Snow, Thomas Xuan Phan's Advanced DBA Certification Guide and Reference for DB2 UDB PDF
By Dwaine R. Snow, Thomas Xuan Phan
Now, there is a definitive consultant to complicated DB2 UDB database management that still grants all of the intensity and perception you want to organize for the harsh new IBM examination. directly from the DB2 specialists at IBM, this publication bargains systematic and authoritative insurance of each examination target and should function a reference once you have handed the test.For the 1st time, this ebook brings jointly IBM most sensible practices, options, advice, guidance, and principles of thumb for nearly each element of complicated 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 dealing 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 info for Advanced DBA Certification Guide and Reference for DB2 UDB v8 for Linux, Unix and Windows
This can adversely affect the performance of the database. To overcome this, DB2 Version 8 allows containers within a table space to be shrunk. This can be done using either the RESIZE or REDUCE options on the ALTER TABLESPACE statement. Reducing a table space container decreases the size of the container by the specified amount. Resizing a table space container changes the size of the container to the specified size, which can be larger or smaller than the original size. 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.
When a container is added to or removed from a table space, the existing data may need to be rebalanced among the new set of containers. Alter Table Space Options The following options can be used to alter a table space: ADD: Used to add one or more containers to the specified table space. When adding a container to a table space, the container can be added to the last stripe set in the table space. If the container is added to an existing stripe set, the stripe set can be explicitly specified using the ADD TO STRIPE SET option.
Otherwise, it will be added to the existing table space, based on the size of the existing containers and the size of the new container. If the BEGIN NEW STRIPE SET option is specified, the container will be added to the end of the table space in a new stripe set. This will avoid any potential data rebalance. 37 38 Consider a table space created with the following statement: create tablespace ts1 managed by database using (file 'cont0' 60, file 'cont1' 60, file 'cont2' 40) extentsize 10 Because each container will have a tag consuming one extent, the containers will then be able to hold five extents, five extents, and three extents of data, respectively, for a total of 13 extents.
Advanced DBA Certification Guide and Reference for DB2 UDB v8 for Linux, Unix and Windows by Dwaine R. Snow, Thomas Xuan Phan