Hi Jeff,

I don't currently have a "small" dataset - most plotfiles are several gigs - but I'll try to come up with a simple low-res test problem, which will generate some usable data.


On Tue, Jan 4, 2011 at 5:33 PM, j s oishi <jsoishi@gmail.com> wrote:
Hi Chris,

Thanks for the Maestro bundle. I look forward to looking it over. It
would be very helpful for testing and future integration if you could
provide a simple Maestro dataset that you wouldn't mind making public.
It doesn't have to be anything fancy; as long as it's small and AMR,
we can use it for regression testing.

As for splitting based on file format, I don't think that's the right
approach in general. HDF5 is far too general, and far too small a part
of the larger frontend for it to occupy a central part of the object
hierarchy. The devil is in the AMR hierarchy, and the way binary data
is patched together to form overlapping data regions. These are
radically different between Enzo and Flash, despite the fact that they
both store the actual binary field variables in HDF5 format. However,
for the case of BoxLib derived file formats, it might make sense to
make a generic BoxLib reader, and then derive Orion, Maestro, and
Castro from that, since BoxLib provides both the binary data file
format and the AMR hierarchy. The reason our design wasn't made that
way is that Orion was the first non-Enzo code to be supported and the
original designer of the Orion frontend didn't really know much about
BoxLib. However, if there is enough support in the Maestro/Castro
community for yt, I'd be happy to talk to you further about this. I
know that Visit has a generic BoxLib reader, and my understanding from
previous conversations with other Orion users is that it worked
alright for Orion. There have been some changes to the BoxLib file
format over time, but I was able to incorporate at least one of those
into yt (for what we used to call "old BoxLib" files in the Orion
group), so I think we can handle the variates.

thanks again,


On Tue, Jan 4, 2011 at 2:10 PM, Chris Malone <chris.m.malone@gmail.com> wrote:
> Hi Matt,
>> Do you want to push your Maestro changes so that we can
>> take a look at them, see how they are implemented?
> Please find attached my first run-through of adding Maestro support as an hg
> bundle.  There were only a few things I had to change from the Orion
> frontend because they both use the BoxLib data format.  I did have to make a
> change in the OrionStaticOutput._is_valid method to distinguish between the
> two formats.
> I often wondered if it would make more sense to split the frontends based on
> file format, and then let each code subclass from a particular frontend?
> For example, have an HDF5 frontend that Flash and Enzo can subclass.  I'm
> not sure it would make things any cleaner...
> Chris
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