Not sure about SolrJ, but generally in multi core Solr your core has a name and a data dir which don't have to be the same. In your case, you could have 2 cores called "live" and "rebuild" which reside on 2 data dirs called "core0" and "core1". You would always access the cores by their names, and when you swap them your "rebuild" would become your "live". Whenever you swap them a different one will point to the same data dir "core0", but you won't really care which one points where.
Ephraim Ofir -----Original Message----- From: Shaun Campbell [mailto:campbell.sh...@gmail.com] Sent: Friday, September 03, 2010 2:41 PM To: solr-user@lucene.apache.org Subject: Re: SolrJ and Multi Core Set up Thanks Chantal I hadn't spotted that that's a big help. Thank you. Shaun On 3 September 2010 12:31, Chantal Ackermann < chantal.ackerm...@btelligent.de> wrote: > Hi Shaun, > > you create the SolrServer using multicore by just adding the core to the > URL. You don't need to add anything with SolrQuery. > > URL url = new URL(new URL(solrBaseUrl), coreName); > CommonsHttpSolrServer server = new CommonsHttpSolrServer(url); > > Concerning the "default" core thing - I wouldn't know about that. > > > Cheers, > Chantal > > On Fri, 2010-09-03 at 12:03 +0200, Shaun Campbell wrote: > > I'm writing a client using SolrJ and was wondering how to handle a multi > > core installation. We want to use the facility to rebuild the index on > one > > of the cores at a scheduled time and then use the SWAP facility to switch > > the "live" core to the newly rebuilt core. I think I can do the SWAP > with > > CoreAdminRequest.setAction() with a suitable parameter. > > > > First of all, does Solr have some concept of a default core? If I have > core0 > > as my "live" core and core1 which I rebuild, then after the swap I expect > > core0 to now contain my rebuilt index and core1 to contain the old live > core > > data. My application should then need to keep referring to core0 as > normal > > with no change. Does I have to refer to core0 programmatically? I've > > currently got working client code to index and to query my Solr data but > I > > was wondering whether or how I set the core when I move to multi core? > > There's examples showing it set as part of the URL so my guess it's done > by > > using something like setParam on SolrQuery. > > > > Has anyone got any advice or examples of using SolrJ in a multi core > > installation? > > > > Regards > > Shaun > > > >
