My guess is that you will need to take advantage of Solr 1.5's upcoming cloud/cluster renovations and use multiple indexes to comfortably achieve those numbers. Hypthetically, in that case, you won't be limited by single index docid limitations of Lucene.
> We are currently indexing 5 million books in Solr, scaling up over the > next few years to 20 million. However we are using the entire book as a > Solr document. We are evaluating the possibility of indexing individual > pages as there are some use cases where users want the most relevant pages > regardless of what book they occur in. However, we estimate that we are > talking about somewhere between 1 and 6 billion pages and have concerns > over whether Solr will scale to this level. > > Does anyone have experience using Solr with 1-6 billion Solr documents? > > The lucene file format document > (http://lucene.apache.org/java/3_0_1/fileformats.html#Limitations) > mentions a limit of about 2 billion document ids. I assume this is the > lucene internal document id and would therefore be a per index/per shard > limit. Is this correct? > > > Tom Burton-West. > > > >
