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A tablespace is a storage location where the actual data underlying database objects can be kept. It provides a layer of abstraction between physical and logical data, [ 1 ] and serves to allocate storage for all DBMS managed segments.
However, Oracle databases store schema objects logically within a tablespace of the database. The data of each object is physically contained in one or more of the tablespace's datafiles . For some objects (such as tables, indexes, and clusters) a database administrator can specify how much disk space the Oracle RDBMS allocates for the object ...
Tablespace, storage space for tables in a database; Tables, a set of values organized into rows and columns; Indexes, a data structure providing faster queries (at the expense of slower writing and storage to maintain the index structure) Views, a virtual table that is made as it is queried
A database management system (DBMS) is a computer program (or more typically, a suite of them) designed to manage a database, a large set of structured data, and run operations on the data requested by numerous users.
Database tables and indexes may be stored on disk in one of a number of forms, including ordered/unordered flat files, ISAM, heap files, hash buckets, or B+ trees.Each form has its own particular advantages and disadvantages.
The system thus re-creates committed transactions by applying the “after image” records in the redo log files to the database, and undoes incomplete transactions by using the "before image" records in the undo tablespace. Change data capture can read the redo logs.
It utilizes the MySQL client library API as a data transport, treating the remote data source the same way other storage engines treat local data sources whether they be MYD files (MyISAM), memory (Cluster, Heap), or tablespace (InnoDB). NDB Cluster – storage engine for storing tables of rows. NDB Cluster can concurrently support access from ...
The Oracle database tablespace CWMLITE stores OLAPSYS schema objects and integrates Oracle Database OLAP Option with the Oracle Warehouse Builder (OWB). [2] The CWMLITE name reflects the use of CWM — the Common Warehouse Metamodel, which Oracle Corporation refers to as "Common Warehouse Metadata".