http://wiki.apache.org/solr/SolrCloud#Distributed_Requests
- Mark On Jun 27, 2013, at 2:34 PM, Otis Gospodnetic <otis.gospodne...@gmail.com> wrote: > Hi, > > This "search across multiple collections" question has come up a few > times recently: > > http://search-lucene.com/m/2Q1BE0IT4Y/&subj=Search+across+multiple+collections > http://search-lucene.com/m/5JQrXIyhQQ1/&subj=Querying+multiple+collections+in+SolrCloud > > One important variation of this Q is - can one search across MULTIPLE > IDENTICAL collections. > > The use case is that you need to index/archive a lot of data, but > because your searches have a time range filter, instead of having 1 > massive Collection you have to search, you really want to have N > smaller Collection, say weekly, so you can search smaller > Collection(s). > > For example: > A query that limits matches to docs from only the last 48 hours can be > routed only to the Collection for the latest/current week. > If the time range filter needs data from multiple Collections (e.g. > it's for the last 10 days and we have weekly collections), then > IDEALLY, you want to be able to send ONE request to Solr and specify 2 > Collections to search and have Solr handle calling each Collection and > merging. > > Yes, in case of full-text search global IDF would ideally be used, but > Solr is increasingly used for analytical queries and not just > full-text queries, and one doesn't need global IDF for that. > > So: Can one query *multiple identical* Collections with one request > from the client? > If not: should I open a new JIRA issue? > > I see https://issues.apache.org/jira/browse/SOLR-4497 allows aliasing > multiple Collections, which covers the use-case where you know which > Collections might be queried. But in some cases you don't know that > ahead of time, so you can't prepare all the aliases. In that case you > wold want to be able to list all Collections to search in the request > and that's it. > > Maybe this is already doable? > > Thanks, > Otis > -- > Solr & ElasticSearch Support -- http://sematext.com/ > Performance Monitoring -- http://sematext.com/spm
