Advanced Audit for DFHSM - FIXAUDIT volume too much for default HSM ODS Allocation

When there is a sizable amount of commands being issued to DFHSM by a FIXAUDIT process, the DFHSM ODS file quickly exhausts its default space allocation which leads to DFHSM receiving an S878-10 abend and shutting down.

In this example, once the ODS is exhausted, DFHSM is flooded with the following messages:

IEC030I B37-04,IFG0554A,DFHSM,DFHSM,SYS03182,657C,DCTW34

R0TTRA8.FIXAUDIT.F2111WB,

RC=X'00000000',RSN=X'00000000' .....................

One solution is to patch the DFHSM ODS allocation to a larger primary and secondary space values. This approach makes the allocation a one size fits all. We find this approach somewhat impracticable for a number of reasons.

Another solution would be to pre-allocate the ODS file with a size anticipatory of the record count to be processed.

Pre-allocation example of F2111WB with 11556 records expected:

//ALLOC EXEC PGM=IEFBR14

//DEFDSN DD DSN=R0TTRA8.FIXAUDIT.F2111WB,

// DISP=(NEW,CATLG,DELETE),UNIT=SYSDA,

// SPACE=(121,(11556,11556)),AVGREC=U,

// RECFM=FBA,LRECL=121,BLKSIZE=0,

// DSNTYPE=EXTPREF or LARGE

The main objective is to avoid DFHSM experiencing and abend and shutdown due to the ODS space being exhausted. It gets noticed when DFHSM shutdown outside of automation and outside of availability hours. Plus, its not a good look on Advanced Audit either.

It would be nice if the FIXAUDIT process would include an allocation step after the delete step in the generated FIX job. And that the space values be automatically included base on expected record count.