By Dwaine R. Snow, Thomas Xuan Phan
Now, there is a definitive advisor to complicated DB2 UDB database management that still grants the entire intensity and perception you want to organize for the harsh new IBM examination. instantly from the DB2 specialists at IBM, this e-book deals systematic and authoritative insurance of each examination goal and should function a reference upon getting handed the test.For the 1st time, this booklet brings jointly IBM most sensible practices, thoughts, suggestions, instructions, and principles of thumb for almost 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 take advantage of parallelism in DB2 UDBConfiguring federated database accessDesigning and imposing a backup and restoration strategyAbility to enforce a standby databaseMonitoring and tuning DB2Using and handling 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
Single- and multi-partition groups. NOTE Database partitions can be in more than one partition group. For example, database partition 3 is found in all three partition groups, pg123, pg3, and pg1234. 60 61 User-Defined and System-Defined Partition Groups Partition groups are also be classified by the way they were created: 1. User-defined partition groups: These partition groups are created after the database has been created using the CREATE DATABASE PARTITION GROUP statement. The user must have either SYSADM or SYSCTRL authority within the database instance to create a database partition group.
The /RHWM option of DB2DART can be used to remove space map extents within a table space that are no longer required. Within a DMS table space, DB2 places a space map extent at regular intervals in the table space to record the extent usage for a set of extents within the table space. If a table space has had a lot of data deleted from it, there may be space map pages that no longer point to used pages in the table space; however, they are not removed when the data is deleted. The /RHWM option of DB2DART will look for any unneeded space map pages and remove them from the table space to potentially reduce the high water mark.
TABLESPACES View This view contains a row for each table space defined in the database. TABLES catalog view also contains columns that indicate which table spaces are used to store the different table objects. The columns of interest are: TBSPACEID: The internal identifier of the table space where the table's data object is stored TBSPACE: The name of the table space where the table's data object is stored 33 34 INDEX_TBSPACE: The name of the table space that holds all indexes for the table. If this is NULL, the indexes are stored in the TBSPACE table space.