I believe this is largely an address space issue. In the mid-90's I worked for a growing telecom which had the largest Oracle 7 database in North America ( close to 10 terabytes as I recall.) The peculiar thing (to me as a POSIX engineer) was Oracle was running on an IBM 3090 MVS sled. No other platform (at that time) could provide the address space needed. (Note that in the later 90's we moved to an HP T500 system with robotic cart library to meet the required archival requirements... Moores law in action.) -R
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