[yt-users] Problems using Rockstar in yt

[Sam Skillman]

Hi Cameron,

Are you running in MPI?  You need to run with at least 3 MPI tasks for
Rockstar to work properly.

Sam


On Mon, Aug 11, 2014 at 6:41 PM, Cameron Hummels <chummels at gmail.com> wrote:

> Hello,
>
> I'm trying to use Rockstar with the new HaloCatalog functionality in yt
> 3.0, but I'm encountering some problems.  For reference, this is an OS X
> box with the "yt" branch.  I've tested it on two OS X systems to the same
> result.
>
> I modified my install_script.py to have it install Rockstar as described
> here:
>
>
> http://yt-project.org/docs/dev/analyzing/analysis_modules/halo_finders.html#rockstar-installation
>
> Then, after rerunning my install script for the `yt` branch (ie yt-3.1
> dev) I tried to run the script provided here in order to generate a halo
> catalog using HOP:
>
>
> http://yt-project.org/docs/dev/analyzing/analysis_modules/halo_transition.html#getting-halo-information
>
> It can create the catalog fine with finder_method='hop', but when I change
> it to finder_method='rockstar', I get failures.  This is the traceback:
>
> http://paste.yt-project.org/show/TE2DW8gc50urchv4JnUk
>
> In the traceback, it claims that it cannot access librockstar.so, but this
> library exists in the yt-x86_64/lib directory, which is explicitly in from
> my $LD_LIBRARY_PATH.  I can seemingly get it to work, if I add that path to
> my $DYLD_LIBRARY_PATH environment variable, but then a bunch of other
> things break (like vi).  Not sure what to do here.
>
> But assuming there is no vi problem here, even then, when I run the script
> above, I get failures.  Here is the traceback:
>
> http://paste.yt-project.org/show/rCOT1eVT1szR1T6DEUDb
>
> I'm not sure what to do here.  I've also tried running rockstar external
> to yt on an enzo dataset, but it doesn't appear that the version we install
> as part of yt allows it to work on HDF5 datasets.
>
> Has anyone run into any of these problems before?  I'm at a bit of a loss
> as to how to proceed on any of these fronts.
>
> Cameron
>
>
> --
> Cameron Hummels
> Postdoctoral Researcher
> Steward Observatory
> University of Arizona
> http://chummels.org
>
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>
>
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