Hi Roberto, On Wed, Jun 19, 2013 at 12:57 PM, Roberto Ragusa <m...@robertoragusa.it> wrote: > Hi, > > I would like an expert opinion about how to optimally do concurrent > searches on the same index (let's suppose there are several threads > doing searches). Consider these options: > > a) one IndexReader, all threads use it > b) cloned IndexReader's, each thread uses a clone > c) opened IndexReader's, each thread open and keeps its own IndexReader
Best option is a), Lucene will internally clone per-thread data-structure that don't support concurrent access. > What I would like to achieve is: > z) let each thread have an atomic view of the index, i.e. do a reopen when it > wants > (and with no coordination with other threads) > > I think z) is impossible to achieve with a). The best way to achieve this is to use SearcherManager[1][2]. [1] http://lucene.apache.org/core/4_3_0/core/org/apache/lucene/search/SearcherManager.html [2] http://blog.mikemccandless.com/2011/09/lucenes-searchermanager-simplifies.html -- Adrien --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
