lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Cheng <zhoucheng2...@gmail.com>
Subject Re: Seem contradictive -- indexwriter in handling multiple threads
Date Wed, 11 Jan 2012 20:09:49 GMT
Can I create a RAMDirectory based writer and have it work cross all
threads? In the sense, I would like to use RAMDirectory every where and
have the RAMDirectory written to FSDirectory in the end.

I suppose that should work, right?


On Wed, Jan 11, 2012 at 2:31 PM, Michael McCandless <
lucene@mikemccandless.com> wrote:

> On Wed, Jan 11, 2012 at 1:32 PM, dyzc2010 <zhoucheng2008@gmail.com> wrote:
>
> > Mike, do you mean if I create a FSDirectory based writer in first place,
> then the writer should be used in every thread rather than create a new
> RAMDirectory based writer in that thread?
>
> Right.
>
> > What about I do want to use RAMDirectory to speed up the index and
> search processes?
>
> IndexWriter is very efficient in using RAM across multiple threads
> now... so this isn't worth it at indexing time.
>
> At search time... MMapDirectory is a good way to let the OS use
> currently free RAM for caching.
>
> Mike McCandless
>
> http://blog.mikemccandless.com
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message