I'm looking for a UNIX equivalent to a MVS technique. In MVS a datasat can be opened as MOD so that additional records will automatically be appended to the end. I need to do the same thing in UNIX but have not found the syntax.
Note that this is not a PROC APPEND or PROC DATASETS type of action. The volume of data is too high to make hundreds of thousands of datasets and append them together. This process needs to write to a single output file as the data is derived.
Does anybody know the UNIX method for opening a file for appending records or the location of this method in SAS docs?