Re: Disk cache

On Apr 9, 2006, at 19:02, MooPolice@xxxxxxxxxxxxxx wrote:

> > There has been some discussion on the IRC channel about benefits and
> > possible cache algorithms for a disk cache in libtorrent. I'm posting
> > this hoping that somebody could comment on some of the techniques or
> > assumptions.
>
> One thing that we did not discuss in irc channel is the open file  
> limit. I can imagine that it
> has a bad effect on the os's caching if the files get often opened  
> and closed because the
> torrent(s) have to many files. (i.e. 40 isn't much for scanlations)

I don't think the OS' cache is flushed just because the file is  
closed. At least my experience on windows XP and OSX 10.4 suggests  
that there is no measurable speed difference between opening and  
closing the file for each piece that is read, or just leaving the  
file open. Except when you have (crappy?) anti virus software that  
hooks on file close and scans the file's content.

--
Arvid Norberg




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