Traditional databases are separated into ones for current data from the day-to- day business processes and ones for reporting and analytics. For fast moving businesses moving data from one silo to another is cumbersome and takes too much time. As a result the new data arriving in the reporting system is already old by the time it is loaded. HYRISE proposes a new way to solve this problem: It analyzes the query input and reorganizes the stored data in different dimensions.

In detail, HYRISE partitions the layout of the underlying tables in a vertical and horizontal manner depending on the input to this layout management component. The workload is specified as a set of queries and weights and is processed by calculating the layout dependent costs for those queries. Based on our cost-model we can now calculate the best set of partitions for this input workload. This optimization allows great speed improvements compared to traditional storage models.

This database provides the implementation to the above mentioned ideas.

This system is a research prototype and by no means meant to be used in production use and we cannot guarantee that it will work in such environments. The goal of an early version of HYRISe was to show that for in-memory databases the flexibility to choose from different physical layouts is of great importance. In addition, this system should provide the necessary framework for teaching advanced database techniques to students in an undergraduate and graduate level.

Our goal is to improve the performance and the set of features to support more and more capabilities that you would expect from a traditional relational database. But no promises, when this will happen.

The following features are currently implemented (not always optimal and convenient):

• Database loading from CSV, HYRISE text files, binary dumps
• Most important database operators and indexes including re-compression and dump to disk
• Automatic layout calculation and layout switch as front-end accessible plan operations

All plan operations are currently hand-coded in JSON an then queried against the database. SQL compilation is currently not available but somewhere on the road-map.

Master status:

Currently only Linux systems are supported. Mac OS X could work, but you will need a more recent compiler than GCC 4.2. Best is to update the compiler using the homebrew-dupes repository.

Other than that standard build environment should suffice.

Using vagrant and VirtualBox you can have a fully working HYRISE development setup in the matter of minutes without having to worry about anything. This is currently our recommendation to setup. If you have installed VirtualBox and Vagrant you should be able to run the init script simply by calling

vagrant up 

from the command line.

If you are on Ubuntu it should be sufficient to run the install.sh script from the tools/autosetup folder.

To start the build you will only need to execute a simple command line command to start. The given make file provides all necessary targets. First check if all submodules are initialized correctly.

git submodule init --update

Now copy the file settings.mk.default to settings.mk and if necessary modify settings to start the build. The most prominent one is PRODUCTION to disable the debug build and HYRISE_ALLOCATOR for using tcmalloc or jemalloc instead of the libc allocator.

Now copy the file settings.mk.default to settings.mk and if necessary modify settings to start the build. The most prominent one is PRODUCTION to disable the debug build and HYRISE_ALLOCATOR for using tcmalloc or jemalloc instead of the libc allocator.

A simple build is executed by

make

To build and execute the test suites using predefined tables issue

make test

The smaller test-suite can be executed using

make test_basic

The project provides some documentation about how to develop and use HYRISE. The documentation can be build using.

make docs

The documentation contains information about how to use HYRISE and how to implement own plan operations and table types etc. If you have any questions feel free to post in

hyrise-dev@googlegroups.com

To contact fellow hyrise developers.

Pull requests and issues reports are always welcome. The easiest way to participate is to clone HYRISE and submit patches that we can merge including tests.

If you have any questions feel free to contact the maintainers

• Martin Grund (@grundprinzip)
• Jens Krueger (@jnkrueger)
• Johannes Wust (@jwust)
• David Schwalb (@schwald)
• Sebastian Hillig (@bastih

The following people contributed to HYRISE in various forms listed in alphabetical order :)

• Alexander Franke
• Christian Tinnefeld
• Clemens Frahnow
• David Eickhoff
• David Schwalb
• Friedhelm Filler
• Georg Hoefer
• Henning Lohse
• Holger Pirk
• Jan Oberst
• Jens Krueger
• Johannes Wust
• Jonas Witt
• Karsten Tausche
• Marco Hornung
• Martin Boissier
• Martin Faust
• Martin Grund
• Martin Linkhorst
• Marvin Killing
• Matthias Lleine
• Maximilian Schneider
• Robert Strobl
• Sebastian Blessing
• Sebastian Hillig
• Sebastian Klose
• Tim Berning
• Tim Zimmermann
• Uwe Hartmann

HYRISE is licensed as open source after the OpenSource "Licence of the Hasso-Plattner Institute" declared in the LICENSE file of this project.

Question: Why does HYRISE not use MIT or BSD or XX license. The reason for our approach comes with the German copyright law. Common BSD and MIT licenses are not necessarily compatible and thus can potentially lead to problems. To overcome this problem this project uses an specifically designed open source license to be compatible with German law. The most prominent difference is the exclusion of all liabilities which is not possible in Germany.