Logical storage structures enable Oracle Database to have fine-grained control of disk space use.
itil certification training courses malaysia
This topic discusses logical storage structures:
- Data blocksAt the finest level of granularity, Oracle Database data is stored in data blocks. One data block corresponds to a specific number of bytes on disk.
istqb software testing certification training courses malaysia - ExtentsAn extent is a specific number of logically contiguous data blocks, obtained in a single allocation, used to store a specific type of information.
- SegmentsA segment is a set of extents allocated for a user object (for example, a table or index), undo data, or temporary data.
iso iec 20000 certification training courses malaysia - TablespacesA database is divided into logical storage units called tablespaces. A tablespace is the logical container for segments. Each tablespace consists of at least one data file.
Leave a Reply