Forschung

Treetank - a native versioned XML Storage:

XML underlies the same constant modification scenarios like any other resource especially in flexible environments like the WWW. Therefore intelligent handlings of versioned XML are mandatory. Due to the structural nature of XML, the efficient storage of changes in the data and therefore in the tree needs new paradigms regarding efficient storage and effective retrieval operations. Within Treetank, different layers have the ability to satisfy specific aspects of a node-granular versioning storage.

Get more information from Sebastian Graf or from here…

DTN - Reliable Routing in Disruption Tolerant Networks:

The aim of the DTN-project is to develop a store and forward protocol, that may ensure the delivery of messages in acceptable timely manner.

Get more information from Arshad Islam or from here…

Concluded Projects:

Java Libraries:

• Perfidix, a Java Benchmarking Tool (2004-)
• jSCSI, iSCSI over Ethernet (2004-)

Operating Systems:

• Memory Optimizations. (2000-2001):Optimizations of virtual memory performance when memory is tight or large datasets are used. Resulted in additional functionality in GNU malloc and speed improvements for GNU awk.

• Crossbow. (1996-1999):Toolkit for Integrated Services over Cell Switched IPv6.

• ENskip. (1996): Free implementation of the IPsec-based SKIP protocol for several OS platforms. As ISAKMP/Oaklay (later IKE) was chosen to prevail as the key management for IPsec, the source has not been maintained. Recently, the project web site was also closed. Sun Microsystems still offers a SKIP product and documentation. Even though the product is still called SKIP, it seems to also support non-SKIP IPsec.

Networks:

• TERP. (2001-2002): Traffic Engineering Reference Platform for the IBM PowerNP.

• Hardware Packet Processing/FPX. (2000-2001): Fast packet processing on FPGAs; transfer of Operating Systems design methodology to hardware packet processing.

• Forwarding. (1996-2001): Fast forwarding and packet classification algorithms.

Distributed Systems:

• P2P. (2001-): Efficient, stateless Peer-to-peer data distribution.

• Fuzzycast. (2000-): Achieving scalable and efficient video-on-demand over multicast.

• Multicast. (1999-2001): Scalability for multicast mechanisms and applications; includes our ALMI application-layer multicast mechanism.

• VersaKey. (1997-1999): Versatile key management for large and dynamic groups.

• Da CaPo++. (1996-1999): Flexible middleware for multimedia communications.

Other Projects:

• Maintainer of the TIK PGP Keyserver, the swiss contribution to the world-wide PGP Key Server Network. (1996-1999)