Progress
Database Administration
Guide and Reference


Extents

Extents make it possible for a Progress Version 9 database to extend across more than one file system or physical volume. Extents are disk files or UNIX raw partitions that store physical blocks of database objects.

There are two types of extents: fixed-length and variable-length. With fixed-length extents you control how much disk space each extent uses by defining in the .st file the size of the extent in kilobytes. Variable-length extents do not have a predefined length and can continue to grow until they use all available space on a disk.

See "Creating and Deleting Databases," for information on defining both fixed- and variable-length extents in the .st file.


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