Re: [Xen-users] Clean deleted space in linux diks?

[Simon Hobson <linux@xxxxxxxxxxxxxxxx>]

I have to admit, I've always wondered why FS tools don't have a "wipe 
free space" function. While it's easy to do it with the techniques 
mentioned, I can't help wondering if it has any knock on effects on 
the filesystem.
Does it, for example, have any impact on the number of size of free 
extents at the end of it ? Does it make some files (eg log files) 
that would otherwise be contiguous (or nearly so) get split when free 
space is almost non-existant ?
I'm guessing the answer is probably "yes, but insignificant in the 
grand scheme of things".

Oh yes, if a single big file is OK, then a simpler command is :
  cat /dev/zero >bigfile ; rm bigfile

--
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

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