CamCASP/Programming/6

From CUC3
Revision as of 16:29, 20 April 2010 by import>Am592
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

CamCASP => Programming => Direct Access Files

CamCASP uses objects (matrices and vectors) that can be stored as direct access files. This allows the code to free memory on demand in a dynamic manner. At present, the files I/O is handled by record_handler.F90. This module is now about 6 years old and is unnecessarily complicated and probably slow (no tests were ever done). Also, recent versions of gfortran seem to be unable to handle the module correctly with the result that we cannot access files larger than about 512MB. I'm not sure what's causing this. It could very well be a genuine bug in the module, or elsewhere, but it is proving rather hard to find. The main reason for this is the complexity of record_handler.F90. So I feel like the time has come for us to retire this module.

Retrieved from "http://wikis.ch.cam.ac.uk/cuc3/wiki/index.php?title=CamCASP/Programming/6&oldid=4048"