what is in-core and out-of-core solutions.

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  • Last Post 08 August 2019
moeenkhurram posted this 06 August 2019

Hi

can anyone please. explain me these two terms. 

structural ansys hpc solver memory out-of-core ram solution in-core sparse-direct-solver
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peteroznewman posted this 06 August 2019

in-core means the solver can hold the entire matrix in RAM for solving.

out-of-core means the solver cannot hold the entire matrix in RAM for solving. Instead it does the solving on smaller parts of the matrix in RAM by writing the entire matrix to disk storage. That means it spends time reading and writing a lot of data to the disk to make its way through the entire matrix. This takes more time to solve.

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moeenkhurram posted this 06 August 2019

Hi peter , thank you for the reply.

How to know whether is in core or out of core ?

 

I am using 122gb ram + 170 gb virtual memory . Also why only 56gb is allocated to sover? 

 

 

peteroznewman posted this 06 August 2019

Later on in the output listing it says what method it chose to use for solving.

Don't worry about the memory allocated to the solver.

kjohnson10 posted this 08 August 2019

Please how did you get to this image?

I'm trying to figure out my memory issues, but I don't see anything like this.

 

-Kerry

moeenkhurram posted this 08 August 2019

its in solver output

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