Thanks Eric for the response. Will lucene/solr provide me aggregations ( of field vaues ) satisying a query criteria ? e.g. SELECT SUM(price) WHERE item=fruits
Or I need to use hitCollector to achieve that ? Any sample solr/lucene query to compte aggregates ( like SUM ) will be great. -Thanks, Prasenjit On Thu, Jan 5, 2012 at 7:10 PM, Erick Erickson <erickerick...@gmail.com> wrote: > the time interval is just a RangeQuery in the Lucene > world. The rest is pretty standard search stuff. > > You probably want to have a look at the NRT > (near real time) stuff in trunk. > > Your reads/writes are pretty high, so you'll need > some experimentation to size your site > correctly. > > Best > Erick > > On Wed, Jan 4, 2012 at 12:17 AM, prasenjit mukherjee > <prasen....@gmail.com> wrote: >> I have a requirement where reads and writes are quite high ( @ 100-500 >> per-sec ). A document has the following fields : timestamp, >> unique-docid, content-text, keyword. Average content-text length is ~ >> 20 bytes, there is only 1 keyword for a given docid. >> >> At runtime, given a query-term ( which could be null ) and a >> time-interval, I need to find out top-k frequent keywords which >> contains the query-term ( optional if its null ) in its context-text >> field within that time-interval. I can purge the data every day, hence >> no need for me to have more than a days data. >> >> I have quite a few options here : Starting with MySQL, NoSQLs ( >> Cassandra, Mongo, Couch, Riak, Redis ) , Search-Engine based ( >> lucene/solr ) each having its own pros/cons. >> >> In MySQL we can achieve this via : GROUP-BY/COUNT clause >> In NoSQL I can probably write a map/reduce task to query these >> numbers. Although I am not very sure about the query response time. >> Not sure of we can achieve it via lucene/solr OOB. >> >> Any suggestions on what would be a good choice for this use case ? >> >> -Thanks, >> prasenjit >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >> For additional commands, e-mail: java-user-h...@lucene.apache.org >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
