<div dir="ltr">Yosef<div><br></div><div>There was a small change -- we added an additional attribute that makes it easier (or possible) to reconstruct the buffer region, so that it can be excluded from visualization. I don't think VisIt makes use of this information yet. Performance wise this should make no difference at all.</div><div><br></div><div>HDF5 also allows setting parameters that influence caching. Maybe VisIt differs in its behaviour there? But now I'm just guessing; I'm hoping that others might know something for real.</div><div><br></div><div>-erik</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 4, 2018 at 3:49 PM, Yosef Zlochower <span dir="ltr"><<a href="mailto:yosef@astro.rit.edu" target="_blank">yosef@astro.rit.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Thanks.<br>
I was trying to load the same file under both versions of visit.<br>
Both version seem to use hdf5 version 9, which is the one automatically <br>
downloaded and installed by the build_visit script. The output file was <br>
created using the ET_2015_11 branch. Has the carpet output format <br>
changed since then?<br>
<span class=""><br>
On 06/04/2018 03:36 PM, Erik Schnetter wrote:<br>
> Yosef<br>
> <br>
> Without knowing any details: Newer HDF5 versions (1.10 and later) are <br>
> supposed to be more efficient in handling metadata. I do not know <br>
> whether this applies to writing as well as to reading. It might be that <br>
> your VisIt versions are linked against different HDF5 library versions. <br>
> (I assume that you are testing against the same HDF5 file.)<br>
> <br>
> -erik<br>
> <br>
> <br>
> On Mon, Jun 4, 2018 at 2:43 PM, Yosef Zlochower <<a href="mailto:yosef@astro.rit.edu">yosef@astro.rit.edu</a> <br>
</span><span class="">> <mailto:<a href="mailto:yosef@astro.rit.edu">yosef@astro.rit.edu</a>>> wrote:<br>
> <br>
> Hi,<br>
> I was trying to load CarpetIOHDF5 2D data with visit 2.10 and<br>
> 2.13. I<br>
> compiled both using the build_visit scripts with the --hdf5 option. The<br>
> 2.13 takes much longer to load.<br>
> <br>
> For example, with a file containing 3 timelevels, 2.10 takes under a<br>
> second to load, and 2.13 takes about 7 seconds. This gets much worse as<br>
> the number of time levels is increased. It took 2 minutes to open a<br>
> file<br>
> with 10 timelevels in 2.13, but under a second with 2.10<br>
> <br>
> Has anyone else seen this? Is there a workaround?<br>
> <br>
> <br>
> -- <br>
> Dr. Yosef Zlochower<br>
> Center for Computational Relativity and Gravitation<br>
> Associate Professor<br>
> School of Mathematical Sciences<br>
> Rochester Institute of Technology<br>
> 85 Lomb Memorial Drive<br>
> Rochester, NY 14623<br>
> <br>
> Office:74-2067<br>
> Phone: +1 585-475-6103<br>
> <br>
</span>> <a href="mailto:yosef@astro.rit.edu">yosef@astro.rit.edu</a> <mailto:<a href="mailto:yosef@astro.rit.edu">yosef@astro.rit.edu</a>><br>
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<span class="HOEnZb"><font color="#888888">> <br>
> -- <br>
> Erik Schnetter <<a href="mailto:schnetter@cct.lsu.edu">schnetter@cct.lsu.edu</a> <mailto:<a href="mailto:schnetter@cct.lsu.edu">schnetter@cct.lsu.edu</a>><wbr>><br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Erik Schnetter <<a href="mailto:schnetter@cct.lsu.edu" target="_blank">schnetter@cct.lsu.edu</a>><br><a href="http://www.perimeterinstitute.ca/personal/eschnetter/" target="_blank">http://www.perimeterinstitute.ca/personal/eschnetter/</a></div><div><br></div></div></div>
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