On Sat, 28 March 2009 21:18:51 -0400, Jeff Garzik wrote:
quoted text
> 
> Was the BSD soft-updates idea of FS data-before-metadata a good one? 
> Yes.  Obviously.
> 
> It is the cornerstone of every SANE journalling-esque database or 
> filesystem out there -- don't leave a window where your metadata is 
> inconsistent.  "Duh" :)

Your idea of 'consistent' seems a bit fuzzy.  Soft updates, afaiu, leave
plenty of windows and reasons to run fsck.  They only guarantee that all
those windows result in lost space - data allocations without any
references.  It certainly prevents the worst problems, but I would use a
different word for it. :)

Jörn

-- 
Don't worry about people stealing your ideas. If your ideas are any good,
you'll have to ram them down people's throats.
-- Howard Aiken quoted by Ken Iverson quoted by Jim Horning quoted by
   Raph Levien, 1979
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