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From "Glen Newton" <glen.new...@gmail.com>
Subject Re: Scaling
Date Wed, 16 Jul 2008 14:01:36 GMT
A subset of your questions are answered (or at least examined) in my
postings on multi-thread queries on a multiple-core single system:
http://zzzoot.blogspot.com/2008/06/simultaneous-threaded-query-lucene.html
http://zzzoot.blogspot.com/2008/06/lucene-concurrent-search-performance.html

-Glen

2008/7/16 Karl Wettin <karl.wettin@gmail.com>:
> Is there some sort of a scaling strategies listing available? I think there
> is a Wiki page missing.
>
> What are the typical promblems I'll encounter when distributing the search
> over multiple machines?
>
> Do people split up their index per node or do they use the complete index
> and restrict what part to search in using filters? The latter would be good
> for the scores, right? Then how do I calculate the cost in speed for the
> score with better quality? I mean, splitting the index in two and searching
> on two machines using ParallelMultiSearcher probably means that I'll get
> something like 30% speed improvement and not 100%. Or?
>
> Is there something to win by using multiple threads each restricted to a
> part each of the same index on a single machine, compared to a single
> thread? Or is it all I/O? That would mean there is something to gain if the
> index was on SSD or in RAM, right?
>
>
>      karl
>
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