D.5.2. FMS Matrix File Parameter LENSDF

Data Type

Integer

Units

REAL*8 (8-byte) words

Default Value

0 = determined by FMS in subroutine RSDI, RNDI, CHDI, CSDI, CNDI
PROFILE matrixes only (MFMAT=1).

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) for Profile matrices.

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 CPU processing cores 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 change the default value of 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.