Scott Hess wrote:
> > That wouldn't make a difference, because the NetApp Filer would still
> > schedule mtime updates for evey write access to the file that has been
> > vnconfiged on the client.
> 
> Probably talking through my hat, here, but doesn't NetApp use a LFS
> (log-structured file system) variant?

Almost.  It's called WAFL, for "Write Anywhere File Layout".

> In any case, assuming that I got the analysis right, that means the mtime
> update should be essentially free, since it's already going to be writing
> a new inode for the file to capture any new blocks written.

Nope.  The cost is not free.


> http://www.netapp.com/tech_library/3001.html#I4, also note the Ousterhout
> reference in the bibliography.  An even stronger indicator is at
> http://www.netapp.com/tech_library/3002.html#I35.

Heh.  You need to read your own references.  8-).

-- Terry

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