February 15, 2007, 13:10
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Memory allocation problem
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#1
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Guest
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I am trying to run Fluent in parallel and test the speedup which I get out of the parallelization. I have been able to estimate the speed up for a grid of about 64^3 cells. now I am expecting the speedup to be better for the finer grid (~122^3 cells) but my problem is that I can not estimate the run time on a serial machine for this grid as the simulation fails after one iteration because of memory problems. I also have to mention that I could not adapt the 64^3 grid to ~122^3 grid on the serial machine due to the same problem with memory, so I refined the grid on two CPU's and then read the refined grid into the serial machine but as I said it crashed right away..so the question is; is there a way of increasing the amount of memory allocated for Fluent simulation? I do not use the Sun utility (SGE) and we do not have batch scheduler..etc I saw thru few websites that some people specify the memory allocation in the batch script or thru the SGE utility.. so any input on this issue will be highly appreciated...
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