yes at 100GB it would be unrealistic, but if every entry is only 100kb it would be only 10 gigabytes, and as the bits set to one are random each server would only need to XOR 5 gigabytes of data per request with a database of 100,000 items. If entries are limited to 10kb, each server would need to XOR about 500 megabytes per request with a database of 100,000 items.