Charlie, thank you for replying and for the link to the blog about XJoin. I am still concerned about performance and caching. Our environment is distributed and the external service would not be running on localhost. In our still experimental set-up, at least, the call to the service is much too slow to be a viable option without caching. I am new to Solr caching, hence all the questions in my original post.
Thanks again, Jitka On Mon, Mar 14, 2016 at 2:07 AM, Charlie Hull-3 [via Lucene] < ml-node+s472066n4263572...@n3.nabble.com> wrote: > On 11/03/2016 17:36, Jitka wrote: > > Hello. Our company uses Solr-4.10 in a distributed environment. We are > > considering how best to customize results based on user preferences, > > information about which is obtained from an external service. At > present > > the preferences can be expressed as filters, but eventually we might > want to > > introduce boosts as well. > > You might want to consider XJoin as well: here's a blog post we wrote on > filtering using price discount data from an external source > > http://www.flax.co.uk/blog/2016/01/25/xjoin-solr-part-1-filtering-using-price-discount-data/ > > > > Cheers > > Charlie > > > > > The options we are considering are > > > > (1) a value source whose FunctionValues() function would make use of > data > > from the external service, and > > > > (2) a separate core containing docs whose primary key is user_id and > whose > > other fields represent data from the service. We would create filter > > queries based on joins with this core. > > > > Any suggestions would be most welcome. Are we missing an obvious > > alternative? > > > > I assume that we would want to cache data from the service (in option > (1)) > > or the join (in option (2)), and possibly also the values of the value > > source's FunctionValues() function in option (1). Would it make > > sense to use SolrCaches for this purpose and register them in > > solrconfig.xml? If so, or if not, how would we ensure that these > caches > > could be updated whenever the service is updated? How about ensuring > that > > the built-in caches don't prevent Solr from even looking at the custom > > caches? We could use the 'cache=false' option for the filterCache; > would we > > have to worry about other ones? > > > > I see how how a join on a second core could support a filter, but how > could > > we use a second core to support boosts? I suppose that if worse came to > > worst we could forgo the join and simply make a call to the second core > on > > localhost to retrieve data to be used in a value source. Is that a > > practical solution? > > > > Thanks in advance for your time and advice. > > > > Jitka > > > > > > > > > > > > -- > > View this message in context: > http://lucene.472066.n3.nabble.com/using-data-from-external-service-in-Solr-value-source-or-auxiliary-core-tp4263334.html > > Sent from the Solr - User mailing list archive at Nabble.com. > > > > > -- > Charlie Hull > Flax - Open Source Enterprise Search > > tel/fax: +44 (0)8700 118334 > mobile: +44 (0)7767 825828 > web: www.flax.co.uk > > > ------------------------------ > If you reply to this email, your message will be added to the discussion > below: > > http://lucene.472066.n3.nabble.com/using-data-from-external-service-in-Solr-value-source-or-auxiliary-core-tp4263334p4263572.html > To unsubscribe from using data from external service in Solr: value source > or auxiliary core?, click here > <http://lucene.472066.n3.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=4263334&code=aml0a2ExOEBnbWFpbC5jb218NDI2MzMzNHwyMTIwMTk5NzA1> > . > NAML > <http://lucene.472066.n3.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> > -- View this message in context: http://lucene.472066.n3.nabble.com/using-data-from-external-service-in-Solr-value-source-or-auxiliary-core-tp4263334p4263924.html Sent from the Solr - User mailing list archive at Nabble.com.
