Contributors: David Austin, Prasad Bagal, Cathy Baird, Mark Bauer, Eric Belden, Bill Bridge, Allen. Brumm, Sudip Datta, Mark Dilman, Jacco Draaijer, Harvey. Oracle Database 11g Release 2 () New Features in the Administrator's Guide xxxix. Part I Basic Database Administration. 1 Getting Started with . Database 10g: 2 Day DBA. Contact Oracle University for more information. The Oracle Database. Oracle is a relational database. In a relational.
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Oracle DBA Concise Handbook. Oracle DBA Concise 2nd Edition – updated for 10g & 11g .. Word format (PDF format is also available). So, you can. Pete has also passed all the Oracle DBA Certifications (Oracle7,. Oracle8, Oracle8i, and Oracle9i) 2 Installing Oracle Database 10g and Creating a Database. 50% OFF 10g DBA Oxford 1Z Pdf Free Download [Oracle Database: SQL Fundamentals I] Oracle Guide.
Physical and logical structures[ edit ] An Oracle database system—identified by an alphanumeric system identifier or SID  —comprises at least one instance of the application, along with data storage. An instance—identified persistently by an instantiation number or activation id: SYS.
Oracle documentation can refer to an active database instance as a "shared memory realm". In addition to storage, the database consists of online redo logs or logs , which hold transactional history. Processes can in turn archive the online redo logs into archive logs offline redo logs , which provide the basis for data recovery and for the physical-standby forms of data replication using Oracle Data Guard.
In version 10g, grid computing introduced shared resources where an instance can use CPU resources from another node in the grid.
Top DBA Shell Scripts for Monitoring the Database
Information is shared between nodes through the interconnect—the virtual private network. Storage[ edit ] The Oracle RDBMS stores data logically in the form of tablespaces and physically in the form of data files " datafiles ". Segments in turn comprise one or more extents. Extents comprise groups of contiguous data blocks.
Data blocks form the basic units of data storage. A DBA can impose maximum quotas on storage per user within each tablespace. Specific partitions can then be added or dropped to help manage large data sets.
LOGICAL STORAGE STRUCTURES
Monitoring[ edit ] Oracle database management tracks its computer data storage with the help of information stored in the SYSTEM tablespace. A data dictionary consists of a special collection of tables that contains information about all user- objects in the database. Since version 8i, the Oracle RDBMS also supports "locally managed" tablespaces that store space management information in bitmaps in their own headers rather than in the SYSTEM tablespace as happens with the default "dictionary-managed" tablespaces.
DBAs can manage these files manually or leave their administration to Oracle itself. Note that a datafile has to belong to exactly one tablespace, whereas a tablespace can consist of multiple datafiles.
Redo log files, recording all changes to the database — used to recover from an instance failure. Often, a database stores these files multiple times for extra security in case of disk failure. Identical redo log files are associated in a "group".
Undo files: These special datafiles, which can only contain undo information, aid in recovery, rollbacks, and read-consistency. Archive log files: These files, copies of the redo log files, are usually stored at different locations.
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Data files can occupy pre-allocated space in the file system of a computer server, use raw disk directly, or exist within ASM logical volumes.
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