<html dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style id="owaParaStyle" type="text/css">
<!--
p
{margin-top:0;
margin-bottom:0}
-->
P {margin-top:0;margin-bottom:0;}</style>
</head>
<body ocsi="0" fpstyle="1">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">All,<br>
<br>
I just wanted to ping the community one more time to see if anyone has any suggestions on this issue. I have not received any feedback yet but I have received emails from some other users with this issue.
<br>
<br>
Thanks for any help you can provide. <br>
<br>
- Jacob<br>
<div style="font-family: Times New Roman; color: #000000; font-size: 16px">
<hr tabindex="-1">
<div style="direction: ltr;" id="divRpF925082"><font color="#000000" face="Tahoma" size="2"><b>From:</b> flash-users-bounces@flash.uchicago.edu [flash-users-bounces@flash.uchicago.edu] on behalf of McFarland, Jacob A.<br>
<b>Sent:</b> Tuesday, July 05, 2016 9:00 AM<br>
<b>To:</b> flash-users@flash.uchicago.edu<br>
<b>Subject:</b> [FLASH-USERS] larger FLASH hdf5 files in visit<br>
</font><br>
</div>
<div></div>
<div>
<div style="direction:ltr; font-family:Tahoma; color:#000000; font-size:10pt">Hello all,<br>
<br>
I emailed the visit users group with this issue but I have not received any info back yet. As this is a problem many of you may have encountered with FLASH data I thought the FLASH users group might have some advice as well.
<br>
<br>
I am having a problem with Visit consuming a lot of memory when opening FLASH hdf5 files. I have simulations with about 50E6 nodes on the fluid mesh and about 20k particles. The hdf5 files are written with parallel hdf5 (I ran the setup with +hdf5TypeIO). The
chk files are 5-16gb or so in size, getting larger in time as there are more nodes at later times.
<br>
<br>
When I open the files with Visit each processor seems to consume enough memory to open the whole chk file no matter how many processor I throw at it. This means I end up memory limited and have to rune with very few processor on each computer node.
<br>
<br>
I expected visit would be able to break up the hdf5 files so that each processor would not need the whole file in memory. This is the behavior I have seen when using other codes with data in the silo format.
<br>
<br>
Is this the normal behavior for visit with large FLASH data files? <br>
<br>
If not, any suggestions on what I am doing wrong?<br>
<br>
If so, any suggestions on how to mitigate this memory problem?<br>
<br>
Thanks,<br>
Jacob<br>
<br>
<br>
</div>
</div>
</div>
</div>
</body>
</html>