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From "David Lee" <davidt...@gmail.com>
Subject Re: Clarification about segments
Date Mon, 25 Aug 2008 17:39:53 GMT
ok, thanks. I knew that the documents were buffered in memory until they
were flushed, but I thought that in memory, they were still separate
documents/segments until they were merged together at the appropriate time
(dependent on the mergeFactor).

Do you mean that when the IndexWriter flushes the documents in memory to the
disk, it will merge all the documents in that flush to one segment?

Thanks!
David

On Sat, Aug 23, 2008 at 2:40 AM, Karsten F.
<karsten-lucene@fiz-technik.de>wrote:

>
> Hi David,
>
> this is not true, please take a look to
> IndexWriter#setRAMBufferSizeMB
> and
> IndexWriter#setMaxBufferedDocs
>
> But you can produce 9 segments (each with only one document), if you call
> IndexWriter#flush
> or
> IndexWriter#commit
> after each addDocument
>
> so from my knowledge about lucene there is no difference between
> #flush
> and
> #optimize(getMergeFactor())
> (btw #optimize() is equal to optimize(1) ).
>
>
> Best regards
>  Karsten
>
> p.s. and yes, searching goes through every segment.
>
>
> David Lee-26 wrote:
> >
> > So from what I understand, is it true that if mergeFactor is 10, then
> when
> > I
> > index my first 9 documents, I have 9 separate segments, each containing 1
> > document? And when searching, it will search through every segment?
> >
> > Thanks!
> > David
> >
> >
>
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>
>
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