[Users] Slow reading of Carpet data in visit 2.13

[Erik Schnetter]

Yosef

Without knowing any details: Newer HDF5 versions (1.10 and later) are
supposed to be more efficient in handling metadata. I do not know whether
this applies to writing as well as to reading. It might be that your VisIt
versions are linked against different HDF5 library versions. (I assume that
you are testing against the same HDF5 file.)

-erik


On Mon, Jun 4, 2018 at 2:43 PM, Yosef Zlochower <yosef at astro.rit.edu> wrote:

> Hi,
>    I was trying to load CarpetIOHDF5 2D data with visit 2.10 and 2.13. I
> compiled both using the build_visit scripts with the --hdf5 option. The
> 2.13 takes much longer to load.
>
> For example, with a file containing 3 timelevels, 2.10 takes under a
> second to load, and 2.13 takes about 7 seconds. This gets much worse as
> the number of time levels is increased. It took 2 minutes to open a file
> with 10 timelevels in 2.13, but under a second with  2.10
>
> Has anyone else seen this? Is there a workaround?
>
>
> --
> Dr. Yosef Zlochower
> Center for Computational Relativity and Gravitation
> Associate Professor
> School of Mathematical Sciences
> Rochester Institute of Technology
> 85 Lomb Memorial Drive
> Rochester, NY 14623
>
> Office:74-2067
> Phone: +1 585-475-6103
>
> yosef at astro.rit.edu
>
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-- 
Erik Schnetter <schnetter at cct.lsu.edu>
http://www.perimeterinstitute.ca/personal/eschnetter/
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