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Does MultiSearcher do anything particularly efficient to search multiple indices or does it simply search one after the other?

April 26, 2017indices particularly search

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Does MultiSearcher do anything particularly efficient to search multiple indices or does it simply search one after the other?

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MultiSearcher searches indices sequentially. Use ParallelMultiSearcher as a searcher that performs multiple searches in parallel. Please note that there’s a known bug in Lucene < 1.9 in the MultiSearcher's result ranking.