Have you looked at solr sharding? Best Erick
On Thu, Apr 7, 2011 at 2:24 AM, Sean Bigdatafun <sean.bigdata...@gmail.com>wrote: > Thanks, David. > > I am thinking of a scenario that billions of objects, whose indices are too > big for a single machine to serve the indexing, to serve the querying. Is > there any sharding mechanism? > > > Can you give a comparison between solr-based geospatial search and PostGIS > based geospatial search? > * scalability > * functionality richness > * incremental indexing (re-indexing) cost > * query cost > * sharding scheme support > > > > On Wed, Apr 6, 2011 at 9:42 PM, David Smiley (@MITRE.org) < > dsmi...@mitre.org > > wrote: > > > Sean, > > Geospatial search in Lucene/Solr is of course implemented based on > > Lucene's underlying index technology. That technology was originally just > > for text but it's been adapted very successfully for numerics and > querying > > ranges too. The only mature geospatial field type in Solr 3.1 is > LatLonType > > which under the hood is simply a pair of latitude & longitude numeric > > fields. There really isn't anything sophisticated (geospatially > speaking) > > in Solr 3.1. I'm not sure what sort of geospatial DB research you have in > > mind but I would expect other systems would be free to use an indexing > > strategy designed for spatial such as "R-Trees". Nevertheless, I think > > Lucene offers the underlying primitives to compete with systems using > other > > technologies. Case in point is my patch SOLR-2155 which indexes a single > > point in the form of a "geohash" at multiple resolutions (geohash lengths > > AKA spatial prefixes / grids) and uses a recursive algorithm to > efficiently > > query an arbitrary shape. It's quite fast and bests LatLonType already; > > and > > there's a lot more I can do to make it faster. > > This is definitely a field of interest and a growing one in the > > Lucene/Solr community. There are even some external spatial providers > > (JTeam, MetaCarta) and I'm partnering with other individuals to create a > > new > > one. Expect to see more in the coming months. If you're looking for > some > > specific geospatial capabilities then let us know. > > > > ~ David Smiley > > Author: http://www.packtpub.com/solr-1-4-enterprise-search-server/ > > > > ----- > > Author: https://www.packtpub.com/solr-1-4-enterprise-search-server/book > > -- > > View this message in context: > > > http://lucene.472066.n3.nabble.com/difference-between-geospatial-search-from-database-angle-and-from-solr-angle-tp2788442p2788972.html > > Sent from the Solr - User mailing list archive at Nabble.com. > > > > > > -- > --Sean >
