On Wed, 2009-07-22 at 01:06 +0100, Andrew Gierth wrote:
> I'm prepared to give slightly more consideration to option #3: make
> the new code read the old format as well as the new one. I believe
> (though I have not yet tested) that it is possible to reliably
> distinguish the two with relatively low overhead, though the overhead
> would be nonzero, and do an in-core format conversion (which would
> result in writing out the new format if anything changed).
It might be good to have a way to ensure that all values have been
upgraded to the new format. Otherwise you have to permanently maintain
the old format even across multiple upgrades. Maybe that's not a big
deal, but I thought I'd bring it up.
Regards,Jeff Davis