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Remote TopicSpaces Server

Remote TopicSpaces Server. Installation and Use Jack Park. Latest: 201000405. Description. Remote Server is an instance of an RDF Store that can be scaled out to multi-platform installations It is not a secure server It must live on a local network not available for direct web access.

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Remote TopicSpaces Server

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  1. Remote TopicSpaces Server Installation and Use Jack Park Latest: 201000405

  2. Description • Remote Server is an instance of an RDF Store that can be scaled out to multi-platform installations • It is not a secure server • It must live on a local network not available for direct web access. • Indirect web access is provided through webservices from web-visible TopicSpaces servers • Server responds to • SPARQL queries • SERQL queries

  3. Architecture TopicSpaces Fed Server Remote Triplestore Local Net Internet

  4. Installation Big Picture • Remote Triplestore builds two databases • A Sesame Native database • Automatic when the Sesame SDK Console is used • A Bigdata TopicSpaces database • Must be created according to instructions • The Tomcat server is running • Sesame SDK Console is used to create the database • Requires certain configuration files adjusted per following instructions which are explained at: • http://sourceforge.net/apps/mediawiki/bigdata/index.php?title=Using_Bigdata_with_the_OpenRDF_Sesame_HTTP_Server • Our instructions are simpler because most of the work is done already

  5. Installation Steps • Install RemoteTSServer at INSTALL_HOME somewhere on an off-line server • Configure triplestore properties • Create a triplestore • Boot tomcat ready to serve • Configure TopicSpaces to use RemoteTSServer

  6. Remote Server INSTALL_HOME • bin: where Tomcat scripts are found • conf: where all important configuration files are found • sesame: used to create the triplestore • templates: used in the triplestore creation phase

  7. Configure Triplestore Properties • Locate and open for editing: • INSTALL_HOME/conf/bigdata.properties • Locate and edit this property: • com.bigdata.journal.AbstractJournal.file= • That determines where your triplestore will sit on the hard disk (note ‘/’ instead of ‘\’) • Locate and edit this property: • com.bigdata.rdf.store.AbstractTripleStore.quads= • It must be set to true • Make a copy of the absolute address of that file, e.g. • c:/RemoteTSserver/conf/bigdata.properties • That will be used in the following steps when it is copied into a console during creation of the triplestore

  8. Create a Triplestore—1 • Use INSTALL_HOME/sesame/openrdf-sesame-2.3.1/bin/console(bat/sh) to boot a console and create a base sesame database on the hard disk in the user’s home directory (different on different operating sytems) • <user_home>/<some directory structure>/Aduna/OpenRDF Sesame console • Exit the console • Copy INSTALL_HOME/templates (the entire directory and its content) to the Aduna console directory • That grants sesame a new template to use in the following steps: • bigdata.ttl

  9. Create a Triplestore—2 • Start Tomcat • INSTALL_HOME/bin/startup(bat/sh) • Start the sesame console again • This begins the process of: • Connecting sesame to the running tomcat server • Creating a bigdata triplestore • This relies on information related to the location of the configuration properties edited in a previous step

  10. Create a Triplestore—3 • In the open console, complete these steps: • create bigdata. <enter> • <enter> to default the next step. • When properties are requested, enter the precise location of the bigdata.propertiesfile from an earlier step, then hit <enter> • That’s it. The triplestore will be created there the first time it is requested. • At this time, Tomcat is running and ready to converse with TopicSpaces

  11. Configure TopicSpaces • Those instructions are included in the TopicSpaces Installation document

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