Extent attributes

VxFS allocates disk space to files in groups of one or more extents. VxFS also allows applications to control some aspects of the extent allocation. Extent attributes are the extent allocation policies associated with a file.

The setext and getext commands allow the administrator to set or view extent attributes associated with a file, as well as to preallocate space for a file.

See the setext(1) and getext(1) manual pages.