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 Extent attributes.
See VxFS I/O interface.
See the setext
(1) and getext
(1) manual pages.
The vxtunefs
command allows the administrator to set or view the default indirect data extent size.
See the vxtunefs
(1M) manual page.
See VxFS performance: creating, mounting, and tuning File Systems.