  The current BDII model relies on information gathering from agents that run
on each core node of a Grid. This information is then published into a Grid
wide information resource known as Top BDII. The Top level BDIIs are updated
typically in cycles of a few minutes each. A new BDDI architecture is proposed
and described in this paper based on the hypothesis that only a few attribute
values change in each BDDI information cycle and consequently it may not be
necessary to update each parameter in a cycle. It has been demonstrated that
significant performance gains can be achieved by exchanging only the
information about records that changed during a cycle. Our investigations have
led us to implement a low latency and fault tolerant BDII system that involves
only minimal data transfer and facilitates secure transactions in a Grid
environment.
