1. A node for use in a multi-node system, the node comprising: a plurality of active devices; an interface to an inter-node network coupling nodes in the multi-node system; and an address network configured to convey address packets between the interface and the plurality of active devices; wherein an active device of the plurality of active devices is configured to send an address packet on the address network to initiate a transaction to gain an access right to a coherency unit; wherein in response to the address packet, the interface is configured to send data corresponding to the coherency unit to the active device if no other active device in the node has an ownership responsibility for the coherency unit and the coherency unit is in a modified global access state in the node.