D05.02. FMS Matrix File Parameter LENSDF

FMS Matrix File Parameter LENSDF

Data Type

Integer

Default Value

0, determined by FMS in subroutine RSDI, RNDI, CHDI, CSDI, CNDI.
PROFILE matrixes only.

DESCRIPTION:

This is the record size used for storing the off-diagonal matrix data in [AL] and [AU] on files LUA(1) and LUA(3). The units are REAL*8 words (8-bytes).

When FMS selects this value, the following factors are considered:

The shape of the matrix, as specified by the profile vector {LOWEQ},
The amount of memory available in the FMS memory pool,
The compute block dimension NEQBLK,
The number of processors MAXCPU,
The file location INCORE,
The minimum unit of address for the disk LSECTR,
The number of stripes per record, as specified by NUMIOQ and NUMSTP.

If you override the default value by setting LENSDF, FMS may change the value you specify if it determines that your specified value would not allow processing to complete.

If you are creating permanent matrix files in different jobs that you later want to process together, you may need to set LENSDF so all files will have compatible data storage.