HP-UX Reference (11i v1 00/12) - 1M System Administration Commands N-Z (vol 4)

__________________________________________________________________________________________________________________________________________________________________________________________________
__________________________________________________________________________________________________________________________________________________________________________________________________
STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man1m/naaagt.1m
________________________________________________________________
___ ___
s
setext(1M) setext(1M)
NAME
setext (vxfs) - set extent attributes
SYNOPSIS
/usr/sbin/setext [-F vxfs][-e extent_size][-f flag][-r reservation][-V] file
DESCRIPTION
setext specifies a fixed extent size for a file, and reserves space for a file. The file must already exist.
Options
-e extent_size Specify a fixed extent size. extent_size is the number of file system blocks to allocate
for the extent. An extent_size of zero cancels previous fixed-size extents for the file
and uses the default extent allocation policy. See vxtunefs(1M) for information on
extent size parameters.
-F vxfs Specify the VxFS file system type.
-f flags The available allocation flags are
align
Specify that all extents must be aligned on extent_size boundaries relative to the
start of allocation units.
chgsize
Immediately incorporate the reservation into the file and update the file’s on-disk
inode with size and block count information that is increased to include the
reserved space. The space added to the file is not initialized. Only users with
appropriate privileges can use the
chgsize option.
contig
Specify that the reservation must be allocated contiguously.
noextend
Specify that the file may not be extended after the preallocated space is used.
noreserve
Specify that the reservation is not a persistent attribute of the file. Instead, the
space is allocated until the final close of the file, when any space not used by the
file is freed. The temporary reservation is not visible to the user (via getext(1M)
or the
VX_GETEXT ioctl, for example).
trim
Specify that the reservation is reduced to the current file size after the last close
by all processes that have the file open.
-r reservation Preallocate space for file. reservation is specified in file system blocks.
-V Echo the completed command line, but do not execute the command. The command
line is generated by incorporating the user-specified options and other information
derived from /etc/fstab . This option allows the user to verify the command line.
NOTES
setext is available only with the HP OnLineJFS product.
You can specify multiple flags by entering multiple instances of -f on the command line.
You must specify the allocation flags with either the
-e or -r
option.
Only the
align and noextend allocation flags are persistent attributes of the file and therefore visible
via getext(1M) or the VX_GETEXT ioctl. Other allocation flags may have persistent effects, but are not
visible as allocation flags.
In some cases, fsadm may reorganize the extent map of a file in such a way as to make it less contiguous.
However, it will not change the geometry of a file that has a fixed extent size.
SEE ALSO
getext(1M), fsadm_vxfs(1M), vxtunefs(1M), vxfsio(7) (particularly the section on
VX_SETEXT).
Section 1M−−786 − 1 − HP-UX Release 11i: December 2000
___
___