Personal tools
 

Managing disk space during run time

During a successive approximation procedure, superfluous data can be erased after each run while keeping all the necessary data and status files.

For this purpose the user can provide a file named clean containing the required erase statements such as:

rm -rf d3*
rm -rf elout
rm -rf nodout
rm -rf rcforc


The clean file will be executed immediately after each simulation and will clean all the run directories except the baseline (first or 1.1) and the optimum (last) runs. Care should be taken not to delete the lowest level directories or the log files prepro, started, replace, finished, response.n or history.n (which must remain in the lowest level directories).These directories and log files indicate different levels of completion status which are essential for effective restarting. Each file response.response_number contains the extracted value for the response: response_number. E.g., the file response.2 contains the extracted value of response 2. The essential data is thus preserved even if all solver data files are deleted. The response_number starts from 0.
 

Complete histories are similarly kept in history.history_number.
 

The minimal list to ensure proper restarting is:

prepro
XPoint
replace
started
finished
response.0
response.1
.
.
history.0
history.1
.
.

 

Remarks:

  1. The clean file must be created in the work directory.
  2. If the clean file is absent, all data will be kept for all iterations.
  3. For remote simulations, the clean file will be executed on the remote machine.

 

For LS-DYNA the following additional options are available to reduce data:

  1. Compress the d3plot database. All results except displacements, velocity, and accelerations will be deleted.
  2. Write the results for a user selected set of parts. A file specifying the list of parts to be included/excluded is required. The file consists of multiple lines with a single entry per line. The syntax of the file is
    • id includes the part with id,
    • id1-id2 includes the parts from id1 to id2,
    • –id excludes the part with id. Only parts included with id or id1-id2 can be excluded.
      For example:
           5
           7-20
           -9.

 

 The LS-OPT GUI allows this to be set as an advanced solver option: