See https://dbs.uni-leipzig.de/study/ss_2018/bigdprak

• Hyeon Ung Kim (LastMinuteHero)
• Tim Niehoff (regexpr)

• J. Zschache

• Maven
• MongoDB
• Neo4J
• Mongo Connector + Neo4j doc manager

You can install mongo connector and neo4j doc manger with

pip install -r utils/pip-requirements.txt   

Please visit our Wiki to find out which Versions of the requiremental software we have used: https://github.com/regexpr/polyglot-db/wiki/

git clone https://github.com/regexpr/polyglot-db
cd polyglot-db/PolyG-DBP/
mvn install

1. Run one Neo4j database in the background:

neo4j/bin/neo4j console

2.a Run one mongod replica set in the background

mongod --replSet exSet 

2.b For the first time, initialize the replica set

mongo
rs.initiate()

3. Run PolyG-DBP

cd polyglot-db/PolyG-DBP/target
java -jar PolyG-DBP-0.1.jar

• java -jar PolyG-DBP-0.1.jar help: Displays this help;
• java -jar PolyG-DBP-0.1.jar list: lists all queries provided by PolyG-DBP.;
• java -jar PolyG-DBP-0.1.jar QUERY [Options] Benchmark with the given query. Example

  java -jar PolyG-DBP-0.1.jar q1

• java -jar PolyG-DBP-0.1.jar custom [Options] Benchmark with a custom query from PolyG-DBP. You will be asked to specify your queries for Mongo and Neo4j afterwards. Example: java -jar PolyG-DBP-0.1.jar custom.

• -i, --inputPath to the directory with JSON file(s). Example:

java -jar PolyG-DBP-0.1.jar q1 -i yelp

• -nb, --neo4jAddressBolt1Adress of the neo4j instance with the bolt address. Example:

java -jar PolyG-DBP-0.1.jar q1 -nb localhost:7687

• -nr, --neo4jAddressRemoteAdress of the neo4j instance with the remote address. Example:

java -jar PolyG-DBP-0.1.jar q1 -nr localhost:7474

• -m, --mongoAddressAdress of the mongodb instance. Example:

java -jar PolyG-DBP-0.1.jar q1 -m localhost:27017

• -md, --mongoDatabaseName of the mongodb database. Example:

java -jar PolyG-DBP-0.1.jar q1 -md yelp

• -r, --reduceImport just a certain amount of lines of each input JSON. Example:

java -jar PolyG-DBP-0.1.jar q1 -r 300

• q1: Output all business names and ids a rated with minumum of
• q2: Output the average stars of all businesses
• q3: Output the average stars of all businesses that grouped by category
• q4: Output the average stars of all businesses grouped by category descending order
• q5: Output all businesses that are in the category Cannabis Tours and return the average of all stars grouped by all the categories that they are in
• q6: Output all businesses that were reviewed more than 700 times
• q7: The same query as above, but this time we count the reviews in the reviews collection
• qa: Run all queries above.

• Why not testing the efficiency of the neo4j data model created by mongo-connector + neo4j doc manager? You can import the YELP dataset into the Neo4j directly by inserting the commands given in utils/Neo4jImportYelpJsons.txt into a cypher shell.