[petsc-dev] [petsc-maint #60349] Saving multiple Vec in the same binary file

[Matthew Knepley]

I have bitten the HDF5 bullet. From Python, it is great since you can use
PyTables, which is an excellent package. I am still getting the PETSc
support there, but the Vec output is fine.

   Matt

On Fri, Jan 7, 2011 at 3:48 AM, Jed Brown <jed at 59a2.org> wrote:

> On Thu, Jan 6, 2011 at 16:04, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
> > > I guess one could store some kind of a catalog in the .info file that
> > would allow reloading object by name in any order. Do you have a feeling
> > that anybody other than me could be interested?
> >
>
> In the long term, we need something better.  PETSc binary formats can't
> carry enough metadata to be usefully plottable without user interaction.  I
> think I'm still in favor of a SQLite backend (for simplicity and
> versatility) indexing binary files written using MPI-IO.  Most
> visualization
> and metadata tasks should be answerable in 1-line SQL queries instead of
> custom page-long graph traversals.
>
> >>> On a different but not unrelated topic, Imtiaz who had started looking
> > at the vtk IO had to leave LSU after our international services office
> > screwed up his immigration paperwork... I am going to work with another
> > student, Matt Kemp, on this project. Matt happens to also work part time
> for
> > ANL and will be at MCS next week. I'll ask him to stop by and introduce
> > himself to the group. He is also a good python / web programer so I was
> > thinking of asking him to have a look at item 3 of the proposed project
> > list: "Converting PetscLogViewPython() to generate JSON instead and
> > developing Python parsers for quickly generating nice tables of
> performance
> > details from runs or groups of runs." Is this still open?
> >
>
> Yes, but have a look at petscplot (
> https://github.com/jedbrown/petscplot/wiki/PETSc-Plot) for some ideas on
> plotting.  (petscplot parses plain ASCII output and creates a few plot
> styles, see https://github.com/jedbrown/tme-ice/blob/master/make.sh#L5 for
> more example invokations.)
>
>
> On Thu, Jan 6, 2011 at 16:04, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>> > I guess one could store some kind of a catalog in the .info file that
>> would allow reloading object by name in any order. Do you have a feeling
>> that anybody other than me could be interested?
>>
>
> In the long term, we need something better.  PETSc binary formats can't
> carry enough metadata to be usefully plottable without user interaction.  I
> think I'm still in favor of a SQLite backend (for simplicity and
> versatility) indexing binary files written using MPI-IO.  Most visualization
> and metadata tasks should be answerable in 1-line SQL queries instead of
> custom page-long graph traversals.
>
> >>> On a different but not unrelated topic, Imtiaz who had started looking
>> at the vtk IO had to leave LSU after our international services office
>> screwed up his immigration paperwork... I am going to work with another
>> student, Matt Kemp, on this project. Matt happens to also work part time for
>> ANL and will be at MCS next week. I'll ask him to stop by and introduce
>> himself to the group. He is also a good python / web programer so I was
>> thinking of asking him to have a look at item 3 of the proposed project
>> list: "Converting PetscLogViewPython() to generate JSON instead and
>> developing Python parsers for quickly generating nice tables of performance
>> details from runs or groups of runs." Is this still open?
>>
>
> Yes, but have a look at petscplot (
> https://github.com/jedbrown/petscplot/wiki/PETSc-Plot) for some ideas on
> plotting.  (petscplot parses plain ASCII output and creates a few plot
> styles, see https://github.com/jedbrown/tme-ice/blob/master/make.sh#L5 for
> more example invokations.)
>
>


-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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