[daip] Test of VBMRG

[Eric Greisen]

Jon Romney writes:
 > 
 > --  Load all three passes sequentially using FITLD, with
 > concatenation ON and compression OFF.  This seemed to
 > work.  Output dataset: STNSUBTEST.UVDATA.1.
 > 
 > --  Sort into BT order using MSORT.  It notes a "Truely
 > brute force disk copy to be done", but also "Appears to
 > have ended successfully".  Output dataset:
 > STNSUBTSRT.UVDATA.1.

      UVSRT is probably better than MSORT for such sorts.

 > 
 > --  Run VBMRG on the sorted dataset.  This failed, with
 > error message: "RECORD LENGTH=  6154 GREATER THAN  2060 /
 > VMRGUV: VMERGE ERROR  8".

       Corrected the issue of a small internal buffer.

 > 
 > The datasets mentioned above are on 'thuban' disk 2,
 > user #1891.

I have also made it work on compressed data.  But you should note that
the results on a compressed data set are not the same as on an
uncompressed data set.  I have added to the help file an attempt to
explain why this is so.

The task should be available Tuesday via the MNJ.

Eric Greisen