
systems using a large fragment size can cause much wasted space particularly
when the files being stored are smaller than 4096 bytes.
8.5.3 How to Use JFS Compression and Check its Consequences
This example shows you how to create a compressed journaled file system, and
then how to use some simple commands to investigate the effects of
compression on both AIX Version 4 performance and disk space usage.
To investigate compression, let′s use the availvg volume group. The example
was done
after
the migratepv example discussed in 8.8.1, “How to Use the
migratepv Command” on page 312. This means that we have three physical
volumes available, each with 287 ...