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Customising the script

    If you wish to modify the data reduction process more than can be done by editing the parameter block at the head of the ccdbig script, the body of the script can be modified directly, for instance to insert different applications or to run them with different options. To insert new applications no special care needs to be taken, but in order to perform the resource logging, prior to each major process run from the script there must be inserted a line of the form
log_start label
where label should be an identifier of not more than 11 characters, and is typically the name of the application about to be executed. For instance to log resource usage of the KAPPA application COMPAVE, the following could be inserted after the invocations of MAKEMOS:
#  Average pixels to produce a smaller image.
      log_start compave
      compave mosaic shrunk-mosaic 2
Examples of this can easily be seen by examining the ccdbig script as distributed.

In the case that more complex modifications are to be made however, e.g. running more than one command between invocations of log_start, it would be wise to consult the inline comments at the head of the reslog script to gain a better understanding of how the resource logging works.



next up previous
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CCDBIG: assessing CCDPACK resource usage for large data sets
Starlink System Note 69
Mark Taylor
6 July 1998
E-mail:ussc@star.rl.ac.uk