[Info-vax] VMS defragmenters

[Alan Winston - SSRL Central Computing]

In article <002d666f$0$19613$c3e8da3 at news.astraweb.com>, JF Mezei <jfmezei.spamnot at vaxination.ca> writes:
>This is worth its own topic.
>
>There was a fragmentation analyser on a decus tape last millenia.
>
>And there has been COPY/CONTIGUOUS for many eons which allowed
>individual files to be defragmented.
>
>But with more recent VMS versions, wasn't there a "built-in"
>defragmenter ? If not, what is the SET FILE/MOVE/NOMOVE used for ?

There was/is a layered-product vendor-provided defragmenter, DFO (Disk/File
Optimizer).  I use it; it works.

(I have some trouble comprehending what is the impact of disk fragmentation on
a disk that's an imaginary construct based on arbitrary slices of physical
disks in a SAN is, potentially automatically resizing.  I mostly don't worry
about it much anymore.)

-- Alan