Thanks a lot Otis! I will definitely look into Lucene for more information on Searchers.
WIth respect to Solr, I have a quick question - If I restart Solr server, and search, then definitely a new Searcher would be initialized. As per my understanding, stopping the server should close the Searchers as well. Is it correct assumption? Thanks, Manu Otis Gospodnetic wrote: > > Manu, > > If you truly want to get a better feeling for the notion of a Searcher, my > advice is to play with Lucene a little bit first. Do you have a copy of > Lucene in Action? You get get a cheaper version online on > manning.com/hatcher2 if you want and quickly read a bit about Searcher in > one of the early chapters. In short, the searcher is the object/the thing > that performs searches against an index. > > More answers to your questions below. > > >> We use Data Import feature of Solr to index database tables. Now, I send >> a >> query(*:*) through Solr Admin console for searching. And I get back >> search >> result. In this whole process, I have following questions - >> 1. What is the significance of Searcher in this case? > > The searcher is the thing that performed the search. It took your query > string, opened an index, ran the search, and got results. > >> 2. When is Searcher invoked? > > When you run a search request. > >> 3. Who invokes Searher? > > You do, when you call one of the SearchComponents or RequestHandlers, when > you run a search request. > >> 4. Where it is Stored? > > Searcher is not really "stored". It's a piece of code that runs inside > Solr, which runs inside a servlet container, which runs inside a JVM, and > so on. > >> 5. When I send another query (manu:abc), will a new Searcher created? > > No, the same searcher will be used unless you told Solr to open a new > Searcher. > >> 6. How is searcher auto-warmed in this case? > > http://wiki.apache.org/solr/?action=fullsearch&context=180&value=autowarm&fullsearch=Text > > Otis > -- > Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch > > > > ----- Original Message ---- >> From: Manupriya <manupriya.si...@gmail.com> >> To: solr-user@lucene.apache.org >> Sent: Tuesday, January 13, 2009 9:25:02 AM >> Subject: What do we mean by Searcher? >> >> >> Hi, >> >> I am somehow new to Solr. While reading through documents/resources, I >> have >> come across 'Searcher' term many times. I am able to roughly undestand, >> that >> whenever we fire any query, we are actually invoking a searcher. This >> searcher searches through the index and returns results. >> >> But I am not able to fully grasp its meaning. I refered a previous post >> as >> well - http://www.nabble.com/what-is-searcher-td15448682.html#a15448682. >> >> I have also read through - >> http://lucene.apache.org/java/2_3_0/api/org/apache/lucene/search/Searcher.html#Searcher() >> >> >> But I am not able fully appreciate it. >> >> I want to understand Searcher in a practical scenario - >> >> We use Data Import feature of Solr to index database tables. Now, I send >> a >> query(*:*) through Solr Admin console for searching. And I get back >> search >> result. In this whole process, I have following questions - >> 1. What is the significance of Searcher in this case? >> 2. When is Searcher invoked? >> 3. Who invokes Searher? >> 4. Where it is Stored? >> 5. When I send another query (manu:abc), will a new Searcher created? >> 6. How is searcher auto-warmed in this case? >> >> Can anyone please direct me to some tutorial/resource for this? >> >> Thanks, >> Manu >> -- >> View this message in context: >> http://www.nabble.com/What-do-we-mean-by-Searcher--tp21436737p21436737.html >> Sent from the Solr - User mailing list archive at Nabble.com. > > > -- View this message in context: http://www.nabble.com/What-do-we-mean-by-Searcher--tp21436737p21453784.html Sent from the Solr - User mailing list archive at Nabble.com.
