LIGO's mission critical timing system has enabled gravitational wave and multi-messenger astrophysical discoveries as well the rich science extracted. Achieving optimal detector sensitivity, detecting transient waves, especially localizing sources, underpinning of astrophysics, all require proper data time-stamping. Measurements relative arrival times waves between different detectors allow for...

The rapid decrease in the cost of computing and networks has made fault tolerance much cheaper. The gradual increase in the IQ of system designers is leading to a switch from programming hacks to provably fault-tolerant algorithms. These developments have motivated the resumption of archaeological research on Paxos. Some lower-bound theorems have recently been dug up, along with algorithms that...