User Guide

36 Traditional File Services Administration Guide
Traditional File Services Administration Guide
103-000180-001
August 30, 2001
Novell Confidential
Manual 99a38 July 17, 2001
To avoid the overhead of uncompressing files that do not compress well, the
system calculates the compressed size of a file before actually compressing it.
If no disk space will be saved by compression, or if the size difference does
not meet the value specified by the SET parameter named Minimum
Percentage Compression Gain, the file is not compressed. For a general
description of the SET command, see SET in Utilities Reference.
For a file to be uncompressed, there must be enough free space on the volume
to accommodate the uncompressed file size.
For instructions on setting file compression for volumes, directories, and files,
see “Setting File Compression Attributes” on page 36.
For instructions on enabling or file compression, see Creating a Traditional
Vo l u m e in the Novell Storage Services Administration Guide.
Disabling File Compression
File compression is enabled and disabled at the volume level.
If you do not enable file compression when you create a volume, you can
subsequently enable it using the SET utility. Once enabled, however, file
compression cannot be disabled on the volume unless you re-create the
volume.
You can temporarily suspend file compression using the SET command’s
Enable File Compression parameter. For a general description of the SET
command, see SET in Utilities Reference.
Setting File Compression Attributes
To set file compression attributes for a volume (including enabling
compression), use SET for instructions on using SET for the file compression
attributes, see “Using SET to Set File Compression Attributes for Volumes”
on page 36.
Using SET to Set File Compression Attributes for Volumes
Use SET to set file compression attributes for an entire volume. File
compression SET parameters do not affect the volumes file compression is
disabled on.
IMPORTANT: Do not use file compression on a CD-ROM volume.