Chris-
We are running into some I/O issues which I'm beginning to think could be related to the size of the .GZ files that we are using. We have about 25 of these files, each one is 600-800MB as is.

When SAS is "opening" the .GZ file, does it create a file in a temporary space on our SAS server?

We have a macro that is invoked 25 times that opens the GZ, reads in the raw flat file and creates a SAS dataset. It then moves on to the next GZ file. If we were to let this entire process run at one time, would it create 25 temporary files that would only be cleared out when we shut down SAS? Or, does it create one temp file, and then overwrite it when the next file is read in?

Thanks