News

CUSP Paper at IEEE Infocom 2010

The paper "Channel-based Unidirectional Stream Protocol (CUSP)" by Wesley Terpstra, Christof Leng, Max Lehn, and Alejandro Buchmann is accepted for the IEEE Infocom 2010 Mini Conference. CUSP is a novel transport protocol for complex network applications and was specifically designed to replace TCP and UDP in peer-to-peer scenarios. The paper is available online as PDF.

DVS Paper accepted at BenchmarX'10

The paper "Benchmarking Publish/Subscribe-based Messaging Systems" by K.Sachs, S. Appel, S. Kounev, and A. Buchmann is accepted for the 2nd International Workshop on Benchmarking of Database Management Systems and Data-Oriented Web Technologies (BenchmarX'10). BenchmarX'10 will be held in conjunction with DASFAA'10 conference in Tsukuba, Japan

DVS/TU Darmstadt sets new SPECjms2007 benchmark record using HornetQ

Coinciding with the release of HornetQ 2.0.0.GA the Databases and Distributed Systems (DVS) group of the TU Darmstadt (www.dvs.tu-darmstadt.de) announced a new benchmark record for the SPECjms2007 industry standard benchmark. Using the new HornetQ 2.0.0.GA, six results were submitted to the SPEC (www.spec.org) and accepted for publication. The results cover horizontal as well as vertical topologies to analyse the scalability of HornetQ in two dimensions.

More details are available here.

SPEC® and the benchmark name SPECjms® are registered trademarks of the Standard Performance Evaluation Corporation. For the latest SPECjms2007 results visit http://www.spec.org/osg/jms2007.

New Working Group on Benchmarking Research Established at SPEC

The Standard Performance Evaluation Corporation (SPEC) has formed a new working group with the goal to establish a new SPEC Research Committee whose mission will be to promote cutting-edge research on benchmarking methodologies and tools facilitating the development of benchmark suites and performance analysis frameworks for established and newly emerging technologies. Benchmarking in this context is understood in a broad sense covering techniques and tools related to performance measurement, load testing, profiling and workload characterization. From DVS Kai Sachs will be serving as coordinator of the group together with Samuel Kounev.

DVS Group Members Receive SPECtacular Awards

On January 27th at SPEC's annual meeting in San Jose, Kai Sachs and Samuel Kounev were awarded the SPECtacular awards for outstanding contributions to SPEC in 2009. They were honored by their SPEC colleagues - engineers and researchers in the computer industry and in academia - for excellent work and contributions to the organization.

DVS participates in new Excellence Cluster: Software Innovation for the Digital Enterprise

Europe's largest software cluster, Software Innovation for the Digital Enterprise, is one of the winners in the second round of the Excellence Cluster Competition. This cluster is considered the Silicon Valley of Europe, spanning centers located in Darmstadt, Kaiserslautern, Karlsruhe, Saarbrücken and Walldorf. Six projects will drive progress in the cluster itself (management, networking, international presence, continuing education and training, utilization) as well as the methodologies and technologies for research and development of software solutions for digital enterprises.

DVS Student Participation at SenSys

The Wireless Sensor Networks Lab held during the winter term 08-09 produced excellent results. The outcome of the final project was featured in hoch3 and later was documented and accepted as a demo at the 7th ACM SenSys 2009, a top tier conference on sensor networks. Eugen Berlin's excellent work was rewarded with a student travel grant to attend the conference. The award is supported by the U.S. National Science Foundation. We are very pleased to have our students attend such a great scientific conference!

Performance and Scaling in E-Commerce Systems Lecture on Thursday, 05.11.09, canceled

The Performance and Scaling in E-Commerce Systems Lecture scheduled for Thursday, 05.11.09, is canceled.

Talk by Prof. Krithi Ramamritham (Indian Institute of Technology, Bombay) on Friday

Date:	Friday, November 6th, 15:00
Location:	Robert Piloty Building (S2|02), Room: A102
Speaker:	Prof. Krithi Ramamritham, Dept of Computer Science & Engineering, Indian Institute of Technology Bombay
Topic:	Tracking Dynamics Using Sensor Networks: Some Recurring Themes

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Abstract:
Much of the data consumed today is dynamic, typically gathered from distributed sources including sensors, and used in real-time monitoring and decision making applications. Large scale sensor networks are being deployed for applications such as detecting leakage of hazardous material, tracking forest fires or environmental monitoring. Many of these natural phenomena require estimation of their future states, based on the observed dynamics. Strategically deployed sensors can operate unattended and provide the ability to continuously monitor the phenomena and help respond to the changes in a timely manner. In this talk, we show that in- network aggregation, in-network prediction, and asynchronous information dissemination form sound building blocks for addressing the challenges in developing low overhead solutions to monitor changes without requiring prior knowledge about the (dynamics of) the phenomena being monitored.

About Prof. Ramamritham:
Prof. Krithi Ramamritham was full professor at U. Mass. Amherst before moving back to India in 2001, where he is now Vijay and Sita Vashee Chair Professor in the Department of Computer Sc. and Engg. at IIT Bombay. He received his PhD from the University of Utah and also holds an honorary doctorate from the University of Sydney. He is fellow of IEEE, ACM and a member of the Indian Academy of Engineering.
His research explores timeliness and consistency issues in computer systems, in particular, databases, real-time systems, and distributed applications. Recent work addresses these issues in the context of Dynamic Data in sensor networks, embedded systems, mobile environments and the web. During the last few years he has been interested in the use of Information and Communication Technologies for creating tools aimed at socio-economic development

Further Information

DVS/TU Darmstadt sets the benchmark with the worlds first SPECjms2007 submission using Apache ActiveMQ

Coinciding with the release of Apache ActiveMQ 5.3 the Databases and Distributed Systems (DVS) group of the TU Darmstadt (www.dvs.tu-darmstadt.de) announced the worlds first results for the SPECjms2007 industry standard benchmark. Using the brand-new Apache ActiveMQ 5.3, four results were submitted to the SPEC (www.spec.org) and accepted for publication. The results cover horizontal as well as vertical topologies to analyse the scalability of Apache ActiveMQ in two dimensions.

Industry standard benchmark such as SPECjms2007 allow independent analysis and comparison. Since these are the first results officially published, we hope that many more will follow and provide the basis for a fair comparison between different Java Message Service (JMS) implementations on standardized platforms.

The reviewed results are available under:

Apache ActiveMQ 5.3 on IBM x3850 (HT On): 156 SPECjms2007@Vertical Apache ActiveMQ 5.3 on IBM x3850 (HT On): 60 SPECjms2007@Horizontal Apache ActiveMQ 5.3 on IBM x3850 (HT Off): 138 SPECjms2007@Vertical Apache ActiveMQ 5.3 on IBM x3850 (HT Off): 52 SPECjms2007@Horizontal

(see also SPECjms2007 Results)

For persistence KahaDB was successfully used. KahaDB is a 100% Java file based persistence mechanism, which was introduced in Apache ActiveMQ 5.3. Members of the Apache ActiveMQ team supported DVS in configuring and tuning Apache ActiveMQ and KahaDB. The hardware was provided by IBM and Sun Microsystems.

About Apache ActiveMQ

Apache ActiveMQ is the most popular and powerful open source messaging and Integration Patterns provider. Apache ActiveMQ is fast, supports many Cross Language Clients and Protocols, comes with easy to use Enterprise Integration Patterns and many advanced features while fully supporting JMS 1.1 and J2EE 1.4. Apache ActiveMQ is released under the Apache 2.0 License

About SPECjms2007

SPECjms2007 is the first industry-standard benchmark for evaluating the performance of enterprise message-oriented middleware servers based on JMS. It provides a standard workload and performance metrics for competitive product comparisons, as well as a framework for in depth performance analysis of enterprise messaging platforms.

SPECjms2007 measures the end-to-end performance of all components that make up the application environment, including hardware, JMS server software, JVM software, database software if used for message persistence, and the system network. The benchmark provides two metrics, SPECjms2007@Horizontal for the horizontal topology and SPECjms2007@Vertical for the vertical topology.

About DVS/TU Darmstadt

The mission of the Databases and Distributed Systems Group (DVS) headed by Prof. Alejandro Buchmann Ph.D. is to develop new solutions for the integrated management of data, information and knowledge in highly distributed environments.

DVS has a long history in the area of performance evaluation and benchmarking and is active member of SPEC since 2001. Participating in the development of numerous industry standard benchmarks, DVS was also one of the main contributors to the SPECjms2007 benchmark.

Contact Person:

DVS: Kai Sachs (www.dvs.tu-darmstadt.de/staff/ksachs)

Apache ActiveMQ: Gary Tully (blog.garytully.com)

Links:

DVS Homepage: www.dvs.tu-darmstadt.de

ActiveMQ: activemq.apache.org

SPEC and the benchmark name SPECjms are registered trademarks of the Standard Performance Evaluation Corporation. For the latest SPECjms2007 results visit http://www.spec.org/osg/jms2007.

4th ACM International Conference on Distributed Event-Based Systems (DEBS 2010)

In 2010, the 4th ACM International Conference on Distributed Event-Based Systems (DEBS 2010) is taking place in Cambridge, United Kingdom. The DEBS is one of the leading conferecens in the area of event-based systems and event-processing technologies. DVS is represented by Prof. A. Buchmann as member of the Steering Committee and Kai Sachs as member of the Poster Program Committee.

Prüfungstermine

Die aktuellen Prüfungstermine für die mündlichen Prüfungen bei Prof. Buchmann für den Zeitraum 19.10.09 - 21.10.09 sind bekanntgegeben worden. Bei Fragen wenden Sie sich an Dr. Ilia Petrov.

Database Research Internship

Guillermo Gomez Alemida is doing a six month undergraduate research internship at DVS. Guillermo is working together with Dr. Ilia Petrov in the field of databases on new hardware with emphasis on Data Warehousing and Analytics. His internship is a result of an academic cooperation between faculty members of TU Darmstadt and Instituto Tecnologico de Hermosillo (his home university in Mexico).

New DVS Project Proposal DynamoPLV

DVS is part of the "DynamoPLV" project consortium invited to submit full project proposal for the LOEWE initiative.

Dynamo PLV (Dynamische und nahtlose Integration von Produktion, Logistik und Verkehr) aims at investigating and improving the interfaces among manufacturing, logistics and transport. The goal is to make the whole chain more responsive; investigate approaches supporting the decision making process and optimizing the information flow among these systems. DVS will be investigating the dynamic aspects of information flows over the complete product lifecycle; the integration of heterogeneous information and product tracking. For further information please contact Prof. Alejandro Buchmann or Dr. Ilia Petrov.

New DVS Project Proposal "Kooperative Sensorkommunikation"

DVS is part of a project consortium invited to submit a proposal for the LOEWE initiative. The proposed LOEWE cluster "Kooperative Sensorkommunikation" aims at investigating the scientific foundations of cooperative sensor communication scenarios. It targets novel applications and services that scale in terms of bandwidth and number of communicating nodes comming to life in cooperative scenarios. DVS is actively participating in application oriented middleware research. For further information please contact Prof. Alejandro Buchmann or Dr. Ilia Petrov.

Keynote by Prof. A. Buchmann at BIRTE 2009

Prof. A. Buchmann will give a keynote at the BIRTE workshop (held in conjunction with VLDB 2009 VLDB 2009 in Lyon, France). The topic of the keynote is "Complex Event Processing in the Real-Time Enterprise".

High school internship

DVS has a prospective new young member - Patrick Lerner. The remarkable thing about Patrick is that he is still high school student at the AKG Bensheim where he is developing his computer science skills under the supervision of Mrs. Karola Gose. At DVS Patrick is currently doing his summer internship developing a novel content management system.

Hoch3 article about WSN lab

Hoch3 newspaper edition 4/2009 published an article about a game based on a wireless sensor network. The game was developed by students as the final project for the WSN lab in WS 08/09.

QuaP2P research group extended

The research group QuaP2P has been evaluated and extended for another three years by the DFG. Our research focus in the project will include benchmarking peer-to-peer mechanisms and peer-to-peer online gaming.

Date for Lecture Datawarehouse

Please insert your prefered dates for the addtional Data Warehouse lecture here.

Keynote by Prof. A. Buchmann at DEBS 2009

Prof. A. Buchmann will give a keynote at the 3rd ACM International Conference on Distributed Event-Based Systems (DEBS 2009) in Nashville about "Event-Based Applications and Enabling Technologies". The corresponding paper can be found here.

DVS Poster accepted at DEBS 2009

The poster paper "Benchmarking of Message-Oriented Middleware" by K.Sachs, S. Kounev, S. Appel, and A. Buchmann is accepted for the 3rd ACM International Conference on Distributed Event-Based Systems (DEBS 2009).

New DVS Journal Paper

The paper "Benchmarking and Performance Modeling of Event-Based Systems" by Samuel Kounev and Kai Sachs is accepted for publication at the special issue of the journal it - Information Technology on complex event processing.

Professional Activities

Two of our group members, Khalid Nawaz and Ilia Petrov, are serving as reviewer of the Second International Conference on the Applications of Digital Information and Web Technologies (ICADIWT 2009).

DVS Demo Proposal accepted at SIGMETRICS/Performance 2009

The proposal "A Performance Test Harness For Publish/Subscribe Middleware" by K.Sachs, S. Kounev, S. Appel, and A. Buchmann is accepted for the SIGMETRICS/Performance 2009 Demo Competition.

Datawarehouse lecture on 8.5. cancelled!!!!

Datawarehouse lecture on 8.5. (this Friday) cancelled!!!!

Research Internship on Scopes concluded

Jose Ignacio Isaia Brasca concluded his undergraduate research internship at DVS. "Nacho" Brasca worked on extending the Scopes framework for sensor networks by decoupling the automatic maintenance mechanism from the base station nodes, making it a more autonomous system. His trip to Darmstadt was a result of the academic activities of TU Darmstadt members at the Universidad Nacional de Córdoba (his home university in Argentina), which we intend to continue in the future.

Start of Project ADiWa

With the Kick-Off Meeting on April 28th at SAP Headquarters in Walldorf the project ADiWa (Allianz Digitaler Warenfluss) has officially started its operative phase. The project is funded by the Federal Ministry of Education and Research with an amount of 17.7 million Euros and involves various partners from industry. The Databases and Distributed Systems Group works under the administration of SAP Research Dresden on the topic of quality characteristics in event based systems. Contact at DVS is Stefan Appel.

DKE Klausureinsicht

When?	24. Apr. 2009, 10:00 - 11:00
Where?	Raum E202

Registration for the "Performance Engineering in Practice: Benchmarks and other concepts" Seminar for the Summer Term 09 is online

All students interested in participating in the seminar are requested to register by following the information here. Further info can be found here. As part of the seminar we will visit the Sun Benchmark Center and the Sun Museum. We will have several (external) talks on Performance and Benchmarking:

Registration for the "Wireless Sensor Networks Seminar" for the Summer Term 09 is online

All students interested in participating in the seminar are requested to register by following the information here. Further info can be found here.

Talk by Bryan Ford in the Informatik-Kolloquium series

Bryan Ford, Max Planck Institute for Software Systems, Saarbrücken
"Breaking Up the Transport Logjam"

Thursday 12.03.2009, 16:00
Room S2 02 / B002 (Robert-Piloty-Building)

Abstract:

Current Internet transports conflate transport semantics with endpoint addressing and flow regulation, creating roadblocks to Internet evolution that we propose to address with a new layering model. Factoring endpoint addressing (port numbers) into a separate Endpoint Layer permits incremental rollout of new or improved transports at OS or application level, enables transport-oblivious firewall/NAT traversal, improves transport negotiation efficiency, and simplifies endpoint address space administration. Factoring congestion control into a separate Flow Layer cleanly enables in-path performance optimizations such as on satellite or wireless links, permits incremental rollout of new congestion control schemes within administrative domains, frees congestion control evolution from the yoke of "TCP-friendliness," and facilitates multihoming and multipath communication. Though this architecture is ambitious, existing protocols can act as starting points for the new layers-UDP or UDP-Lite for the Endpoint Layer, and Congestion Manager or DCCP for the Flow Layer-providing both immediate deployability and a sound basis for long-term evolution.

Prüfungstermine

Die aktuellen Prüfungstermine für die mündlichen Prüfungen bei Prof. Buchmann sind hier zu finden.

DKE Written Exam

When? 09.03.09 10:00 to 12:30
Where? Hexagon (S311/08)
You can find information about the exam here (in german).

New DVS Project - CASED

DVS is actively involved in CASED - a LOEWE initiative project for IT security research based in Darmstadt. The CASED research centre involves three big research institutions in Darmstadt under leadership of TU Darmstadt. 60 professors and researchers as well as numerous partners from academia and industry will develop new approaches to security of data, services and embedded systems. DVS is coordinating the area of "Secure Service Availability". The major research topics addressed by us in this context involve secure Pub/Sub, Scopes, and Wireless Sensor Networks. Involved are Prof. Alejandro Buchmann and Dr. Ilia Petrov. PhD positions / scholarships in this area are available. For further questions please contact Prof. Alejandro Buchmann.

New DVS Project - ADiWa

DVS is an active partner in a new multi-institution Project - "Allianz Digitaler Warenfluss" short ADiWa; ADiWA is a step towards making the Internet of Things a reality. Major software companies (SAP, Software AG, IDS Scheer, Sopera, B2M, ubigrate) are teaming with major research organizations (Fraunhofer Institutes SIT and IESE, TU Darmstadt, TU Dresden, DFKI, INI-Graphics Net) and logistics companies, producers and retailers (ABB, Schenker, Globus) to integrate the flow of goods and information in the Internet of things. The project is sponsored by the German Federal Ministry of Education and Research (BMBF) with 17.7 million Euro over 3 years and total investment including industrial commitments will amount to more than 40 million Euro. DVS is targeting the area of Quality of Service (QoS) in event based systems. Involved are: Prof. Alejandro Buchmann and Stefan Appel.