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Best configuration for .BAT files on local workstation

[ Edited ]

Hi all,

 

Which is the best configuration for launching .BAT files on local workstation with NX Nastran for linear static, non linear, modal and thermal analysis.

 

I am using this configuration on local worksation with .BAT files, I am not sure about bat=, mem= and parallel= variables and the usage of nastran64.exe or other nastran solver on local WS. Workstations has 64 RAM DDR 3, 3 Hard Drive main one Samsung SSD and 8 cores and windows 8.1

 

"C:\Program Files\Siemens\NX 9.0\NXNASTRAN\bin\nastran64.exe" of0277-200-001_sim1.dat bat=no mem=4 parallel=2

"C:\Program Files\Siemens\NX 9.0\NXNASTRAN\bin\nastran64.exe" of0277-200-002_sim2.dat bat=no mem=4 parallel=2

 

Thanks in advance.

3 REPLIES

Re: Best configuration for .BAT files on local workstation

You want to use nastran64.exe for LP-64 runs (memory requests less than 8GB) and nastran64L.exe for ILP-64 runs.

 

The 'bat(ch)' keyword does nothing on windows - this is a unix/Linux only parameter

 

Mem(ory) is the memory allocation in blocks a value of 4 is way too low. Nastran probably will not even start with this value. This keyword takes text describers - most commonly 'mb' and 'gb'. Specifying "mem=4gb" allocates 4 gigabytes of memory.

 

Parallel (or smp) = 2 is a good value if you have sufficient IO. If you're running on a laptop with a single mechanical SATA drive, you probably won't see much improvement with smp=2.

 

"C:\Program Files\Siemens\NX 9.0\NXNASTRAN\bin\nastran64.exe" of0277-200-001_sim1.dat mem=4gb parallel=2

 

Note: do not use nastran64w.exe or nastran64Lw.exe - the 'w' signifies 'window' - these executables will launch a small dialog that prompts the user to browse to the input file, then allows them to enter an additional keyword string.

Re: Best configuration for .BAT files on local workstation

[ Edited ]

Hi Jim,

 

So for a workstation with 32 to 64 GB RAM DDR3 and 3 Hard Drives the main one SSD and with 8 cores intel. Which is the best .BAT configuration? something like,

 

"C:\Program Files\Siemens\NX 9.0\NXNASTRAN\bin\nastran64L.exe" of0277-200-001_sim1.dat mem=24gb parallel=2 with WS at 32 GB and for WD with 64 GB, mem=48gb parallel=2

 

Thanks,

Solution
Solution
Accepted by topic author Igor
‎08-26-2015 04:32 AM

Re: Best configuration for .BAT files on local workstation

Hello,

 

  Limit the mem keyword for nastran to less than 50% of available RAM on the machine. This will give operating system enough memory for I/O cache.