Novell NETWARE 6-DOCUMENTATION Manual page 2887

avoid suballocation problems. Suballocation does not have any server
parameters to adjust.
To view disk space usage with NetWare Remote Manager, click the
Health Monitor link in the navigation frame and then the Available Disk
Space link on the Server Health Monitoring page. Print the Volume
Information page for your records.
Compression. When using compression in the NSS file system, see the
following procedures, Other NSS Commands in the Novell Storage
Services Administration Guide.
When using compression with the Traditional file system, it is essential
to have the server patched. Because it takes processor cycles to compress
and decompress files, compression needs to be monitored carefully to
avoid utilization problems. The default SET File Parameters for the
Traditional File System for compression takes this into consideration.
For example, file compression is set by default to occur during off-hours
or periods of low server usage. Make sure that change have not been made
that are causing high utilization problems.
File decompression occurs on the fly. However, a very large file, such as
100 MB, can take a noticeable amount of time even with a Pentium*
processor.
SET Deleted Files Compression Option=2 causes the immediate
compression of files that have been deleted. This can cause high
utilization because the processor immediately compresses files upon their
deletion.
Directories that are flagged IC (Immediate Compression) can cause
excessive decompression during work hours. Users with disk space
restrictions might flag their home directories to IC in an attempt to save
disk space. This can affect server performance.
To ensure that frequently used files are not compressed, you can specify
an appropriate value for the SET Days Untouched Before Compression
parameter.
To proactively eliminate compression as a possible problem, use SET
Enable File Compression=Off parameter (Common File System
category). This will cause files to be queued for compression but the files
will not be compressed. However, accessing compressed files causes
them to be decompressed.
130 Server Operating System Administration Guide