Let us know what you find out. I would guess that the gains are not
going to be that spectacular. Creating and deleting files should be
"cheap" operations in a modern OS. Mainly when you compare these to the
costs of openning a new index and populating various caches.
But let us know what you find.
Regards,
Dror
On Mon, Dec 01, 2003 at 02:40:36PM -0800, Kevin A. Burton wrote:
> Dror Matalon wrote:
>
> >>I would assume that removing this lock could increase performance
> >>especially to allow multiple concurrent searches on the same data.
> >>
> >>
> >
> >There was talk about providing that in an upcoming version. Until then
> >you can try RODirectory:
> > http://www.csita.unige.it/software/free/lucene/
> >
> >
> Looking at the source of FSDirectory it seem easy enough to add a
> property to disable indexes.
>
> This way if you wanted to search a directory and you new it was 100%
> necessary to search it readonly you could go ahead and do it without
> having to write lock files.
>
> I will write some unit tests to see what the performance is here. It
> should be trivial to create an index of a few hundred megs and then run
> about 200k queries across it with 30 threads or so... then disable locks
> and see what the total time spent was...
>
> If it's substantial I think it makes sense to make this contribution :)
>
> Kevin
>
> --
> NewsMonster - http://www.newsmonster.org/
>
> Kevin A. Burton, Location - San Francisco, CA, Cell - 415.595.9965
> AIM - sfburtonator, Web - http://www.peerfear.org/
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> IRC - freenode.net #infoanarchy | #p2p-hackers | #newsmonster
>
--
Dror Matalon
Zapatec Inc
1700 MLK Way
Berkeley, CA 94709
http://www.fastbuzz.com
http://www.zapatec.com
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