Subject RE: [ib-support] Re: Generating UniqueID [2]
Author Leyne, Sean

> If in fact the first byte of the GUID changes most frequently,
> you'll tend to have compressed key lengths > 10, meaning that
> the index will be about twice as wide.

The solution, as proposed on other IB/FB list, is the reverse the GUID.
That way the values should be very compressible.