+We are pleased to announce the second release (code name "Curie") of the Einstein Toolkit, an op= en, community developed software infrastructure for relativistic astrophysics= . This release changed the equation of state interface from two competing (EO= S_Base and EOSG_Base, also known as the old and the general EOS interface), t= o a completely new interface called EOS_Omni, also adding support for tabulat= ed, microphysical EOSs in the process. In addition, bug fixes accumulated sin= ce the previous release in November 2010 have been included, and the testsuit= es have been checked also using OpenMP.
+ +The Einstein Toolkit is a collection of software components and tools for= simulating and analyzing general relativistic astrophysical systems that bui= lds on numerous software efforts in the numerical relativity community includ= ing CactusEinstein, the Carpet AMR infrastructure and the relativistic hydrod= ynamics code GRHydro (an updated and extended version of the public release o= f the Whisky code). The Cactus Framework is used as the underlying computatio= nal infrastructure providing large-scale parallelization, general computation= al components, and a model for collaborative, portable code development. The = toolkit includes modules to build complete codes for simulating black hole sp= acetimes as well as systems governed by relativistic hydrodynamics. Current d= evelopment in the consortium is targeted at providing additional infrastructu= re for general relativistic magnetohydrodynamics.
+ +The Einstein Toolkit uses a distributed software model and its different = modules are developed, distributed, and supported either by the core team of = Einstein Toolkit Maintainers, or by individual groups. Where modules are prov= ided by external groups, the Einstein Toolkit Maintainers provide quality con= trol for modules for inclusion in the toolkit and help coordinate support. Th= e Einstein Toolkit Maintainers currently involve postdocs and faculty from fi= ve different institutions, and host weekly meetings that are open for anyone = to join in.
+ +Guiding principles for the design and implementation of the toolkit inclu= de: open, community-driven software development; well thought out and stable = interfaces; separation of physics software from computational science infrast= ructure; provision of complete working production code; training and educatio= n for a new generation of researchers.
+ +For more information about using or contributing to the Einstein Toolkit,= or to join the Einstein Toolkit Consortium, please visit our web pages at &l= t;http://einsteintoolkit.org>.<= /p> + +
The Einstein Toolkit is primarily supported by NSF 0903973/0903782/090401= 5 (CIGR), and also by NSF 0701566/0855892 (XiRel), 0721915 (Alpaca), 0905046/= 0941653 (PetaCactus) and 0710874 (LONI Grid).
+ +This release comprises the following tools, arrangements, and thorns. Eac= h tool/arrangement/thorn may have its own licencing conditions, but all are a= vailable as open source. Green components are new in this release.
+ + Cactus Flesh
+ CactusBase Standard Cactus thorns
+ CactusConnect
+ CactusElliptic
+ CactusIO
+ CactusNumerical
+ CactusPUGH
+ CactusPUGHIO
+ CactusTest
+ CactusUtils new: NoMPI
+
+ ExternalLibraries Interfaces to external libraries, new: zlib
+
+Carpet Adaptive mesh refinement ++
EinsteinAnalysis Einstein Toolkit
+ EinsteinBase
+ EinsteinEOS new: EOS_Omni, others will be removed next release
+ EinsteinEvolve LegoExcision wi=
ll be removed next release
+ EinsteinInitialData
+ EinsteinUtils
+
+McLachlan BSSN implementation ++
TAT/TATelliptic Various thorns ++
AEIThorns Thorns hosted at AEI, new: PunctureTracker, SystemStatistics
+
+ LSUThorns Thorns hosted at LSU, new: Vectors
+
+Kranc Automated code generation ++
GetComponents Downloading tools and thorns new repository
+
+SimFactory Building code and running simulations ++ +
The Simulation Factory contains ready-to-use configuration details for mo= re than 60 systems, including most HPC systems at DOE, LONI, TeraGrid, and RZ= G.
+ +The Einstein Toolkit thorns contain over 130 regression test cases. On a = large portion of the tested machines, all of these testsuites pass, using bot= h MPI and OpenMP.
+ +The changes between this and the previous release include:
+All repositories participating in this release carry a branch +ET_2011_05 marking this release. These release branches will +be updated if severe errors are found.
+ +This release has been tested on the following systems and +architectures:
+ +The Simulation +Factory contains ready-to-use configuration details for more than +40 additional systems, including most HPC systems +at LONI, +NERSC, +RZG, +and TeraGrid.
+ +The Einstein Toolkit web site contains online documentation for its +thorns, and pointers for using it to build your own code. There is +also a tutorial that explains how to download, build, and run the code +for a simple binary black hole evolution. We invite you to join our +mailing list +<users(a)einsteintoolkit.org>.
+ +On behalf of the Einstein Toolkit Consortium: the "Curie" Release Team
+ +
+ Gabrielle Allen
+ Eloisa Bentivegna
+ Tanja Bode
+ Peter Diener
+ Roland Haas
+ Ian Hinder
+ Frank Löffler
+ Bruno Mundim
+ Christian D. Ott
+ Erik Schnetter
+ Eric Seidel
+ Michael Thomas
+
April 21, 2011
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