tableBASE library definition considerations

You can increase library blocksize to gain efficiencies in DASD utilization and reduce I/O access, in moving directory and table data between DASD and memory. You can also reduce DASD space requirements if the total data for each table in the library is significantly more than the current blocksize.

First, consider space utilization from the consideration of physical blocksize on 3390-style DASD (the current standard).