On Apr 11, 2011, at 2:41 PM, Otis Gospodnetic wrote: > I think what's being described here is a lot like what I *think* > ElasticSearch > does, where there is no single master and index changed made to any node get > propagated to N-1 other nodes (N=number of index replicas). I'm not sure how > it > deals with situations where "incompatible" index changes are made to the same > index via 2 different nodes at the same time. Is that what vector clocks are > about?
Right - you have to have some sort of conflict detection/resolution - Amazon Dynamo uses vector clocks for this. > > Otis > ---- > Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch > Lucene ecosystem search :: http://search-lucene.com/ > > > > ----- Original Message ---- >> From: Mark Miller <markrmil...@gmail.com> >> To: java-user@lucene.apache.org >> Sent: Mon, April 11, 2011 11:52:05 AM >> Subject: Re: NRT consistency >> >> >> On Apr 10, 2011, at 4:34 AM, Em wrote: >> >>> Hello list, >>> >>> I am currently trying to understand Lucene's Near-Real-Time-Feature which >>> was covered in "Lucene in Action, Second Edition". >>> >>> Let's say I got a distributed system with a master and a slave. >>> >>> In Solr replication is solved by checking for any differences in the >>> index-directory and to consume those differences to keep indices > consistent. >>> >>> How is this possible within a NRT-System? Is there any possibility to >>> consume snapshots of the internal buffer of the index writer to send them > to >>> the slave? >> >> I think for near real time, Solr index replication may not be appropriate. >> Though I think it would be cool to use Andrzej's mythical single pass index >> splitter to create a single+ doc segment that could be shipped around. >> >> Most likely, a system that just sends each doc to each replica is probably >> going to work a lot better. Introduces other issues of course - some of >> which >> we hope to alleviate with further SolrCloud work. >> >>> >>> Regards, >>> Em >>> >>> -- >>> View this message in context: >> http://lucene.472066.n3.nabble.com/NRT-consistency-tp2801878p2801878.html >>> Sent from the Lucene - Java Users mailing list archive at Nabble.com. >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >>> For additional commands, e-mail: java-user-h...@lucene.apache.org >>> >> >> - Mark Miller >> lucidimagination.com >> >> Lucene/Solr User Conference >> May 25-26, San Francisco >> www.lucenerevolution.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 > - Mark Miller lucidimagination.com Lucene/Solr User Conference May 25-26, San Francisco www.lucenerevolution.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
