Re: [Monotone-devel] slow update/status on NFS

[Benoît Dejean]

Le mercredi 23 mai 2007 à 10:26 +0200, Markus Schiltknecht a écrit :
> Hi,
> 
> Richard Levitte wrote:
> > I just looked at the patch, and although I can see that it fixes
> > things for status, I think it could be taken one step further (and
> > thereby generalising the solution) by modifying the file_path class to
> > have a status cache.
> 
> Shouldn't the OS do that sort of caching? 

Oh, and yes, it should and tries to, but on a network filesystem, cache
issues are big. I work in a big company, with a really huge intranet
(worldwide). The filer i use is 1000km away, so the RTT is ~15ms. There
are some NFS/CIFS/etc accelerators, but even with them, a stat call can
take up to 1ms. And of course, worst case is ~15ms.
-- 
Benoît Dejean
GNOME http://www.gnomefr.org/
LibGTop http://directory.fsf.org/libgtop.html

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