Virtual Clusters for (RDF) Stream Processing
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This document outlines research on using virtual clusters and stream processing topologies for integrating sensor data streams. It describes using the Wirbelsturm tool to set up a virtual cluster on which Storm topologies can be deployed to perform real-time processing of sensor observations modeled with ontologies. A use case of integrating heterogeneous environmental sensor data from a sensor cloud is presented where the SSN and SWEET ontologies are used.
![Use case: Sensor Cloud data integration (2/3)
Sensor Cloud messages to field-named tuples
SWEET annotations for heterogeneous phenomena descriptions
<sample time=”20150528T16:30” value=”15” sensor=”bom_gov_au.94961.air.air_temp”/>
[“20150528T16:32”, “20150528T16:30”, “15”, “bom_gov_au”, “94961”, “air”, “air_temp”,
“43.3167”, “147.0075”]
network
phenomenon
platform sensorsampling time
system time
latitude longitude
SensorCloudParser
Bolt
SweetAnnotations
Bolt](https://image.slidesharecdn.com/virtualclusters4rspoct21-151022122137-lva1-app6891/85/Virtual-Clusters-for-RDF-Stream-Processing-6-320.jpg)
Virtual Clusters for (RDF) Stream Processing
- 1. Alejandro Llaves Ontology Engineering Group Universidad Politécnica de Madrid Madrid, Spain allaves@fi.upm.es Oct 21 2015 Virtual Clusters for (RDF) Stream Processing
- 2. Outline Some context: morph-streams++ Motivation Use case: Sensor Cloud data integration Topologies everywhere Setting up a virtual cluster Deploying Storm topologies Conclusion
- 4. Motivation Integrating an unbounded stream of heterogeneous sensor observations Solution: – Storm topologies for real-time processing – Semantic Sensor Network (SSN) ontology for modelling observations – SWEET ontology for environmental phenomena
- 5. Use case: Sensor Cloud data integration (1/3) Sensor Cloud Viticulture, water management, weather monitoring, oyster farming... RESTful API – JSON Network → Platform → Sensor → Phenomenon → Observation Lack of semantic descriptions, e.g. rain_trace vs Rain. Multiple HTTP requests to query various streams. Source: CSIRO
- 6. Use case: Sensor Cloud data integration (2/3) Sensor Cloud messages to field-named tuples SWEET annotations for heterogeneous phenomena descriptions <sample time=”20150528T16:30” value=”15” sensor=”bom_gov_au.94961.air.air_temp”/> [“20150528T16:32”, “20150528T16:30”, “15”, “bom_gov_au”, “94961”, “air”, “air_temp”, “43.3167”, “147.0075”] network phenomenon platform sensorsampling time system time latitude longitude SensorCloudParser Bolt SweetAnnotations Bolt
- 7. Use case: Sensor Cloud data integration (3/3) SSN mapping SSNConverter Bolt
- 8. Topologies everywhere A Storm topology “is a graph of stream transformations where each node is a spout or bolt”. https://storm.apache.org/documentation/Tutorial.html Example of simple topology
- 11. Setting up a virtual cluster (1/2) Wirbelsturm - https://github.com/miguno/wirbelsturm/ Allows deploying (local or remote) virtual clusters. Focus on Big Data technologies: Storm, Kafka, Zookeeper... Uses Vagrant for “easy to configure, reproducible, and portable work environments” - https://docs.vagrantup.com/v2/why-vagrant/index.html Uses Puppet for provisioning: installation and configuration of SW packages in the cluster nodes.
- 12. Setting up a virtual cluster (2/2) $ ./deploy Show wirbelsturm.yaml Check Storm GUI - http://localhost:28080/index.html
- 13. Deploying Storm topologies $ ./deploy Show wirbelsturm.yaml Check Storm GUI - http://localhost:28080/index.html Describe simple topology Compile & deploy Describe a topology set Configure Kafka Compile & deploy
- 15. Conclusion Conclusion Wirbelsturm allows easy configuration & deployment of virtual clusters, with focus on Big Data technologies. SSN and SWEET ontologies to model and integrate environmental sensor observations. Parallelization of bottleneck tasks reduces the average message processing latency (up to some extent). More about Storm parallelization: http://bit.ly/1NVyjU2 Delaying RDF conversion does not speed up the processing of Sensor Cloud messages in the tested environment. Submitted paper to IJSWIS, special issue on Velocity and Variety Dimensions of Big Data – Llaves, Corcho et al. What's coming next Flying faster with Heron - https://blog.twitter.com/2015/flying-faster-with-twitter-heron
- 16. The presented research has has been funded by Ministerio de Economía y Competitividad (Spain) under the project ”4V: Volumen, Velocidad, Variedad y Validez en la Gestión Innovadora de Datos” (TIN2013-46238-C4-2-R), by the EU Marie Curie IRSES project SemData (612551), and supported by an AWS in Education Research Grant award. Alejandro Llaves allaves@fi.upm.es Thanks!