US Patent 9106663 Latency-based routing and load balancing in a network

Aspects of the disclosure relate to routing queries to a network repository and load balancing in a network. For a network repository having a plurality of content storage sites, relative replication latency of data among a pair of content storages sites can be monitored. Data indicative of such replication latency can be distributed among the content storage sites and can be provided, for example, to a network node in a system layer. A traffic and control manager can determine routing pathways for queries based at least in part on the relative replication latency data and performance conditions of network nodes.