accelerating computational speed

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi,

 

I'm trying to solve a big modell with a 64bit windows laptop, 2* i7 cpu and 8gb ram in radioss bulkdata. I have 20 loadcases but 10 of them are buckling analysis and therefore the calculation is running for approx. 4 days now. In the task manager, I've seen that ony 2% of the cpu is in use but 5GB of RAM because before starting the calculation, I've entered 5000 for the memory options-upper limit.

My question is know, if it is possible to accelerate the calculation by using more cpu or ram or both?

Btw. sind a few days, always the same .rs~ files are created and delated (something_s53.rs~ and something_s57.rs~ )

 


 

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Answers

  • tinh
    tinh Altair Community Member
    edited August 2013

    Hi Musti

    run option for CPUs is -ncpu

    run option for RAM is  -len (MB)

    Just looking for in OptiStruct Help

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2013
    Altair Forum User said:

    Hi Musti

    run option for CPUs is -ncpu

    run option for RAM is  -len (MB)

    Just looking for in OptiStruct Help

    oh tnx, just found it image/emoticons/default_smile.png' alt=':)' srcset='/emoticons/smile@2x.png 2x' width='20' height='20'>

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2013

    Hi,

     

    You should learn a bit about solution logic of the model. There are 3 options:

     

    1. Incore Processing

    2. Outcore Processing

    3. Mincore Processing

     

    If your ram level is enough, incore is the best, no extra swap space usage. Outcore uses both ram and swap space in a balanced way. Mincore uses mostly the swap space and leastly the ram.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017
    Altair Forum User said:

    Hi Musti

     

    run option for CPUs is -ncpu

     

     

    run option for RAM is  -len (MB)

     

     

    Just looking for in OptiStruct Help

     

    hi,

    I am not able to find the len (MB) option. Is it in radioss solvere run manager or has to be set in the hyperworks interface before starting the simulation?

  • Q.Nguyen-Dai
    Q.Nguyen-Dai Altair Community Member
    edited November 2017

    8G ram is just for .... playstation! Don't expect something serious with this hardware :D/emoticons/default_biggrin.png' srcset='/emoticons/biggrin@2x.png 2x' title=':D' width='20' />

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020

    Hi Suryanshu,

     -len  option is available for OptiStruct solver. 

    I'm attaching a document on 'Increase Computation Speed and Maintain Accuracy' for RADIOSS solver from the Help Menu. 

    Unable to find an attachment - read this blog

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