Project Roseline

Accurate and reliable knowledge of time is fundamental to cyber-physical systems for sensing, control, performance, and energy efficient integration of computing and communications. This simple statement underlies the RoseLine project.  Emerging CPS [Cyber Physical Systems – vy]  applications depend on

Cassandra

Cassandra is quite interesting – and time sync seems increasingly critical to correct operation. Here are some resources: A paper on the storage model from developers at Facebook. A reasonably clear introduction from IBM Developer Works. A big difficulty for

Time Maps in Action

This shows a time map for a client (center) that is getting NTP time from a variety of standard internet NTP servers and via a customer site (to the left). A TimeKeeper Pocket GrandMaster (bottom left) is serving multiple Stratum