
430 Big Data Computing
Interconnection between blocks is obtained by specifying the block port
(block id + port id) from which the connection starts and by selecting the
specic block port in which the connection ends. The input and output ports
of a chain are assigned a unique id (mnemonic) and mapped to the input and
output ports of selected blocks, identied by their ids.
Architecture
The spChains logic architecture is deployed along three main tiers (see Figure
14.14): (a) the eld-data sources, for example, energy meters, item counters,
pressure, position sensors, etc.; (b) the spChains processing framework; and
(c) the data-centric appl