The Role of atomic clocks as a backup to OCP Timing Appliances in Distributed Databases

Presented by David Chandler (Microchip) The Open Computer Project (OCP) Data Center Profile establishes a framework for maintaining 5 us error between all ordinary clocks in a distributed database. The Timing Appliance Project (OCPTAP) has created an open-source timing grandmaster that can be deployed to maintain 100 ns error between any OCPTAP as part of this framework. But when operating in a Global Navigation Satellite System (GNSS) denied environment, such as jamming and spoofing, timing between grandmasters can rapidly diverge. This presentation will look at the implications of this time divergence, known as holdover, on a globally distributed database. Solutions to minimize the impact of GNSS denial, including the new 5071B cesium primary frequency and time standard will be presented. A method for determining the impact of the timing divergence on transactions per second for the database will be presented with a goal of providing a methodical process for determining the correct holdover solution.

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