From knarf@cct.lsu.edu Tue Jun 14 07:27:55 2016
From: knarf@cct.lsu.edu
To: commits@lists.einsteintoolkit.org
Subject: [Commits] [svn:einsteintoolkit] www/about/releases/ (Rev. 1573)
Date: Tue, 14 Jun 2016 12:27:55 +0000
Message-ID: <20160614122755.645912C62A6@mail.einsteintoolkit.org>
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User: knarf
Date: 2016/06/14 07:27 AM

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+<?php $title=3D'Release Announcement';
+include_once($_SERVER['DOCUMENT_ROOT'].'/global/header.php');?>
+
+<p>We are pleased to announce the twelfth release (code name
+"<a href=3D"https://en.wikipedia.org/wiki/Tycho_Brahe">Brahe</a>") of the
+Einstein Toolkit, an open, community developed software infrastructure for
+relativistic astrophysics. This release includes, among other things,
+
+...
+
+In addition, bug fixes accumulated since the previous
+release in November 2015 have been included.</p>
+
+<p>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 including
+CactusEinstein, the Carpet AMR infrastructure and the relativistic
+magneto-hydrodynamics code GRHydro. The Cactus Framework is used as the unde=
rlying
+computational infrastructure providing large-scale parallelization, general
+computational components, and a model for collaborative, portable code
+development. The toolkit includes modules to build complete codes for
+simulating black hole spacetimes as well as systems governed by relativistic
+magneto-hydrodynamics.</p>
+
+<p>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
+provided by external groups, the Einstein Toolkit Maintainers provide quality
+control for modules for inclusion in the toolkit and help coordinate support.
+The Einstein Toolkit Maintainers currently involve postdocs and faculty from
+six different institutions, and host weekly meetings that are open for anyone
+to join in.</p>
+
+<p>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
+infrastructure; provision of complete working production code; training and
+education for a new generation of researchers.</p>
+
+<p>For more information about using or contributing to the Einstein Toolkit,=
 or to
+join the Einstein Toolkit Consortium, please visit our web pages at
+&lt;<a href=3D"http://einsteintoolkit.org">http://einsteintoolkit.org</a>&gt=
;.</p>
+
+<p>The Einstein Toolkit is primarily supported by NSF
+1212401/1212426/1212433/1212460 (Einstein Toolkit), and also by 0905046/0941=
653
+(PetaCactus) and 0710874 (LONI Grid).</p>
+
+<p>The Einstein Toolkit contains about 200 regression test cases.  On a large
+portion of the tested machines, almost all of these test suites pass, using =
both
+MPI and OpenMP parallelization.</p>
+
+<h4>The changes between this and the previous release include:</h4>
+
+<ul><li><b>Larger changes since last release</b></li></ul>
+
+<ul>
+  <li>
+  Almost all repositories moved from the Einstein Toolkit subversion server
+  to bitbucket, with the ExternalLibraries being the only exception. Taking
+  this move as opportunity, some already existing thorns were moved to more
+  appropriate arrangements.</li>
+
+  <li>
+  Cactus Flesh
+  <ul>
+  <li>While not a particular user-visible change, the Cactus version number =
was
+    bumped to 4.3.0, as a new version of Cactus was released at the same time
+    as this Einstein Toolkit release.
+  <li>Thorns can specify versions for capabilities they provide, and thorns
+    using them can depend on specific versions of those.
+  <li>pthread support got moved into a thorn (ExternalLibraries/pthreads)
+  </ul>
+  <li>
+  McLachlan
+  <ul>
+  <li>re-write of the BSSN thorns: some parameter names changed. Backwards
+    compatible parameter names exist, but the old are deprecated now. Please
+    switch to the new, more consistent, parameter names.
+  </ul>
+
+  <li>
+  New thorns or tools
+  <ul>
+  <li>IllinoisGRMHD (and connected thorns): a new GRMHD code within the Eins=
tein
+    Toolkit. This isn't a drop-in replacement for GRHydro (as a lot of the
+    functionality, and parameters are different), but should be seen as
+    alternative. They are placed in the WVUThorns arrangement.
+  <li>CTThorns: Elliptic solver for Cactus/Carpet. This is a multi-grid solv=
er,
+    and so far has mostly been used for cosmology-type simulations.
+  <li>AH2xdmf.py script (new utility within the AHFinderDirect thorn):
+    reads ASCII AHFinderDirect output files and combines data into hdf5 file
+    that can easily be visualized as time-series within tools like VisIt
+  <li>PITTNullCode/SphericalHarmonicReconGen: generic version of SphericalHa=
rmonicRecon
+ </ul>
+</ul>
+
+<ul><li><b>How to upgrade from Somerville (ET_2015_11)</b></li></ul>
+
+<p>To upgrade from the previous release, use GetComponents with the new thor=
nlist to check out the new version. Switching to the new branch is not possib=
le for most repositories due to repository moves.</p>
+
+<p>See the <a href=3D"http://einsteintoolkit.org/download/">Download</a> pag=
e on the Einstein Toolkit website for download instructions.</p>
+
+<ul><li><b>Remaining issues with this release</b></li></ul>
+
+<ul>
+ <li> Certain machines need to be configured specially in Simfactory because=
 the remote directories cannot be determined automatically just from the user=
 name.  See the Machine notes below.</li>
+ <li> Recovering with Carpet: Carpet stores metadata (such as the simulation=
 time) only for Carpet::max_timelevels time levels, although it is possible t=
o allocate more time levels. These additional time levels then cannot be reco=
vered; the symptom is an assertion failure during recovery. The solution is t=
o either increase Carpet::max_timelevels, or to decrease the number of active=
 time levels.</li>
+</ul>
+
+<ul><li><b>Machine notes</b></li></ul>
+
+<p>Supported (tested) machines include:</p>
+
+<ul>
+ <li> Default Debian, Ubuntu, Fedora and MacOS installations</li>
+ <li> Bethe</li>
+ <li> Bluewaters *</li>
+ <li> Carver</li>
+ <li> Comet</li>
+ <li> Datura</li>
+ <li> Edison</li>
+ <li> Fermi</li>
+ <li> Galileo</li>
+ <li> Gordon</li>
+ <li> Gullimin</li>
+ <li> Hopper</li>
+ <li> Nvidia</li>
+ <li> Philip</li>
+ <li> Queenbee 2</li>
+ <li> Shelob</li>
+ <li> Supermike II</li>
+ <li> Stampede (CPU) *</li>
+ <li> Zwicky</li>
+</ul>
+<p>A * means that a small number of tests fail on that machine. Almost all t=
ests pass on the other machines.</p>
+<ul>
+ <li> Stampede: defs.local.ini needs to have sourcebasedir =3D $WORK and bas=
edir =3D $SCRATCH/simulations configured for this machine.  You need to deter=
mine $WORK and $SCRATCH by logging in to the machine.</li>
+</ul>
+
+<p>All repositories participating in this release carry a branch ET_2016_05
+marking this release.  These release branches will be updated if severe
+errors are found.</p>
+
+<p>The "Somerville" Release Team on behalf of the Einstein Toolkit Consortiu=
m (2016-06-15)</p>
+
+<p>
+&nbsp;&nbsp;&nbsp;Steven R. Brandt<br />
+&nbsp;&nbsp;&nbsp;Peter Diener<br />
+&nbsp;&nbsp;&nbsp;Roland Haas<br />
+&nbsp;&nbsp;&nbsp;Ian Hinder<br />
+&nbsp;&nbsp;&nbsp;Frank L=C3=83=C2=B6ffler<br />
+&nbsp;&nbsp;&nbsp;Bruno C. Mundim<br />
+&nbsp;&nbsp;&nbsp;Erik Schnetter<br />
+&nbsp;&nbsp;&nbsp;Barry Wardell<br />
+</p>
+
+<p>June 15, 2016</p>
+
+<?php include_once($_SERVER['DOCUMENT_ROOT'].'/global/footer.php');?>


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