maitrejg
Mechanical
- Jul 9, 2012
- 1
Hello all,
I am running simple tension calculation on a SMA plate involving four hundred thousand nodes. It is a non linear problem but with a good convergence rate.
My problem is the following: at each equilibrium iteration, the effective CPU time is no more than 5-10% of the overall calculation time. The rest of the time is spent to write cache files such as *.esav, *.osav, *.pc6, *.full, etc on the hard drive (which is awfully slow). As I have plenty of RAM (32GB), I use direct solver with full in-core option. For example:
The conditions for direct assembly have been met. No .emat or .erot
files will be produced.
SPARSE MATRIX DIRECT SOLVER.
Number of equations = 1163391, Maximum wavefront = 129
Memory allocated for solver = 20000.000 MB
Memory required for in-core = 3950.198 MB
Optimal memory required for out-of-core = 631.825 MB
Minimum memory required for out-of-core = 622.643 MB
How can I force Ansys to not write anything on the HDD until the end of the step in order to take advantage of my 6-core i7 with HPC licence ?
Thanks in advance
Guillaume
I am running simple tension calculation on a SMA plate involving four hundred thousand nodes. It is a non linear problem but with a good convergence rate.
My problem is the following: at each equilibrium iteration, the effective CPU time is no more than 5-10% of the overall calculation time. The rest of the time is spent to write cache files such as *.esav, *.osav, *.pc6, *.full, etc on the hard drive (which is awfully slow). As I have plenty of RAM (32GB), I use direct solver with full in-core option. For example:
The conditions for direct assembly have been met. No .emat or .erot
files will be produced.
SPARSE MATRIX DIRECT SOLVER.
Number of equations = 1163391, Maximum wavefront = 129
Memory allocated for solver = 20000.000 MB
Memory required for in-core = 3950.198 MB
Optimal memory required for out-of-core = 631.825 MB
Minimum memory required for out-of-core = 622.643 MB
How can I force Ansys to not write anything on the HDD until the end of the step in order to take advantage of my 6-core i7 with HPC licence ?
Thanks in advance
Guillaume