AIX Storage Management

If we now use compression, our disk space requirements are halved, since we

now only require 4 x 512 = 2048 bytes to store the /compress/2560bytefile file.

However, this is still using a full fragment or less in /compress which has a

fragment size of 2048 bytes. So when we check the space used by

/compress512/2560bytefile, we can see that the LZ compression algorithm has

actually shrunk the file to 20% (512 / 2560) or less of its original size. This is not

too surprising since we know that the shell script

mkfile (as given in 8.5.2, “How

to Use Fragments for Disk Usage Efficiency” on page 272) just creates a file that

has the word yes repeated on each ...