CQELS (Continuous Query Evaluation over Linked Data)

This repository is a fork of https://github.com/KMax/cqels for the purpose of testing CQELS performance with SRBench on lightweight computers. It was originally forked from the CQELS respository on Google Code.

Running SRBench

1. git clone https://github.com/eugenesiow/cqels.git
2. You need to have maven installed.
3. cd cqels
4. mvn dependency:copy-dependencies package
5. cd target
6. chmod 775 run.sh
7. Download station ALPHA's data here and place it in the ../knoesis_observations_ike_csv/ or edit the run.sh accordingly if you place it in a different directory.
8. ./run.sh 1 10 1000 where the first 2 parameters are the queries to run from (e.g. q1 to q10) and the 3rd parameter is the delay (in ms) between events.
9. Results will be output as output/q1.txt and so on. Each line in the output is the time taken from the event being sent to the stream to the result being received through the callable.
10. You can also run ./run_count.sh 1 10 1000 which will export time_taken:results_count instead.
11. You can also run ./run_smarthome.sh 1 2 1000 which run the smarthome analytics benchmark. Note: only queries 1 and 2 are fully supported. For query 3 the FILTER doesn't work with CQELS and has been removed (you can execute the version without). This will require the smarthome data in csv to stream.

Other Projects

• LSD-ETL
• sparql2sql
• sparql2stream
• sparql2sql-server
• Linked Data Analytics