In computer disk
terminology, fragmentation is the
process or condition of files that are composed of more
than one extent
. Fragmentation of this sort is bad,
as it will increase the amount of head
to read the file, and thus slow things down. Poorly optimized
operating systems occasionally need to be
ed to increase performance.
Alternately, in the BSD fast filesystem (also in UFS),
a fragment is a block that has been subdivided to
hold tail ends of several files that would otherwise
each take up an entire block. This kind of fragmentation
is a Good Thing.
Just to be confusing, both meanings of fragmentation
are used when refering to unix filesystems.