Thanks for the Lucene index tip! I was able to make it work by replacing MemoryModel with a DatasetTDB and calling "java -cp ./fuseki-server.jar tdb.tdbloader --tdb=$DB_CONFIG $DB_FILE" and "java -cp ./fuseki-server.jar jena.textindexer --desc=$DB_CONFIG" prior to starting the server.
Quick question: I know you can use tdb:location "--mem--" to create an in-memory tdb dataset, but is this advised for production environments? I wonder if querying an in-memory dataset will be faster than storing it on the disk. Please consider this is a read-only database and I'll be hosting it on Kubernetes, so if my application fails for some reason, it is ready to recover the file contents. Rodrigo Em sex., 28 de ago. de 2020 às 11:41, Andy Seaborne <[email protected]> escreveu: > > :memory_dataset rdf:type ja:RDFDataset ; > > ja:defaultGraph > > [ > > a ja:MemoryModel ; > > ja:content [ ja:externalContent > > <file:////path/to/file/tests.owl> ] ; > ^^^^ > > ] ; > > That loads the RDF data into the memory model directly, bypassing the > text index. To set the index, you'll need to load somehow with the same > data offline or start an empty server then push the data into it. > > BTW1 text:directory "mem" > wil create an in-mmeory Lucense index.) > > BTW2 There is an in-memory dataset implementation > > :memory_dataset rdf:type ja:MemoryDataset; > ja:data "data.trig"; > . > > Andy > > On 27/08/2020 18:00, Rodrigo Vedovato wrote: > > Hi there, > > > > I'm setting up a Fuseki server using the following configuration: > > > > @prefix : <#> . > > @prefix fuseki: <http://jena.apache.org/fuseki#> . > > @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . > > @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . > > @prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> . > > @prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> . > > @prefix text: <http://jena.apache.org/text#> . > > @prefix spatial: <http://jena.apache.org/spatial#> . > > > > [] a fuseki:Server ; > > fuseki:services ( > > :categorydb > > ) > > . > > > > :categorydb a fuseki:Service ; > > fuseki:name "db" ; > > fuseki:serviceQuery "sparql" ; > > fuseki:serviceQuery "query" ; > > fuseki:serviceUpdate "update" ; # SPARQL query > service – > > /memory/update > > fuseki:serviceUpload "upload" ; # Non-SPARQL upload > > service > > fuseki:serviceReadWriteGraphStore "data" ; > > fuseki:serviceReadGraphStore "get" ; # Graph store protocol > > (read only) –/memory/get > > fuseki:dataset :text_dataset ; > > . > > > > :text_dataset rdf:type text:TextDataset ; > > text:dataset :memory_dataset ; > > text:index :lucene-text_index ; > > . > > > > :memory_dataset rdf:type ja:RDFDataset ; > > ja:defaultGraph > > [ > > a ja:MemoryModel ; > > ja:content [ ja:externalContent > > <file:////path/to/file/tests.owl> ] ; > > ] ; > > . > > > > :lucene-text_index a text:TextIndexLucene ; > > text:directory <file:///opt/fuseki/index/ix> ; > > text:entityMap :entity_map ; > > . > > > > :entity_map a text:EntityMap ; > > text:entityField "uri" ; > > text:defaultField "text" ; > > text:map ( > > [ text:field "text" ; text:predicate rdfs:label ] > > ) > > . > > > > Server startup works fine, and the data from my owl file is loaded > > successfully. I can check it by executing: > > > > PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> > > PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> > > PREFIX ns:< > > > http://www.semanticweb.org/rodrigo/ontologies/2020/7/untitled-ontology-7#> > > PREFIX owl:<http://www.w3.org/2002/07/owl#NamedIndividual> > > PREFIX owls: <http://www.daml.org/services/owl-s/1.2/Service.owl#> > > PREFIX text: <http://jena.apache.org/text#> > > > > SELECT ?brand > > WHERE { > > ?brand rdfs:subClassOf ns:mobile-phones . > > } > > > > However, I get no result when I execute a text query: > > > > PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> > > PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> > > PREFIX ns:< > > > http://www.semanticweb.org/rodrigo/ontologies/2020/7/untitled-ontology-7#> > > PREFIX owl:<http://www.w3.org/2002/07/owl#NamedIndividual> > > PREFIX owls: <http://www.daml.org/services/owl-s/1.2/Service.owl#> > > PREFIX text: <http://jena.apache.org/text#> > > > > SELECT ?s { ?s text:query ('samsung') } > > > > This behavior, according to this thread > > <https://jena.markmail.org/thread/grni3o6ch5tfak4j> and JENA-956 > > <https://issues.apache.org/jira/browse/JENA-956>, has been fixed in > 3.0.0, > > but I can't get this to work as expected. Am I doing something wrong? > > > > $ ./fuseki-server --version > > Jena: VERSION: 3.16.0 > > Jena: BUILD_DATE: 2020-07-09T16:13:45+0000 > > TDB: VERSION: 3.16.0 > > TDB: BUILD_DATE: 2020-07-09T16:13:45+0000 > > Fuseki: VERSION: 3.16.0 > > Fuseki: BUILD_DATE: 2020-07-09T16:13:45+0000 > > > > owl file: https://www.dropbox.com/s/1r1j7alstvhakv0/tests.owl?dl=0 > > > > Regards, > > Rodrigo Vedovato > > >
