[aspect-devel] Aspect Parallel Initialization

Eric Heien emheien at ucdavis.edu
Tue Nov 27 09:44:22 PST 2012

While running some tests on TACC Ranger I noticed that Aspect can take a long time to initialize.  This appears to be a function of the number of nodes rather than model size, and becomes quite significant for large scale runs.  When using 16 nodes (256 cores) initialization takes 30 minutes - extrapolating from the trend it appears using 10,000 cores would require a day to initialize.  Before I delve into the reasons for this, has anyone encountered this and know why it is taking so long?


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