This is an interesting paper, but Telecom has not yet come to grips with the problems and advantages of fast shared commodity ethernet interconnect. North American service providers are in the process of upgrading their radio access networks with next
What happens when you do not use enterprise quality technology.
News from last year. Aug. 26, 2013 11:52 a.m. ET A glitch in time synchronization caused German exchange operator Deutsche BoerseAG DB1.XE -0.16% ‘s Eurex Exchange arm to halt trading for slightly more than an hour early Monday, the latest
Measuring Clock Synchronization in the Cloud- NTPd versus TimeKeeper
Measured on Amazon EC2. Standard deviation from reference time over 20 hours TimeKeeper: 23 microseconds NTPd: 6000 microseconds (6 milliseconds)
Cassandra Cluster Synchronization
Cassandra is a highly-distributable NoSQL database with tunable consistency. What makes it highly distributable makes it also, in part, vulnerable: the whole deployment must run on synchronized clocks. It’s quite surprising that, given how crucial this is, it is not covered
NTPd DOS attacks
Miscreants who earlier this week took down servers for League of Legends, EA.com, and other online game services used a never-before-seen technique that vastly amplified the amount of junk traffic directed at denial-of-service targets. Rather than directly flooding the targeted services with
Challenges upgrading time synchronization in a global financial company
The real-world challenges of trying to upgrade time-synchronization without TimeKeeper are described in an excellent 2012 technical paper about a project at the company IMC Global Finance [IMC]. The article documents a two year, highly resourced project run by an
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
Time Synchronization in the Cloud
Synchronizing clocks in the cloud, especially for virtual machines, is way beyond the capabilities of ordinary synchronization methods. Tests show that virtual machines in the cloud relying on NTPd can fall off the reference time by tens of minutes over
The business case for being time protocol agnostic.
Time Synchronization and Distribution is a business critical issue but it is easy to become bogged down in arcane technology/marketing controversies. One of those controversies is over the choice between low level network protocols used to deliver time to application
Challenges deploying PTPv2 in a Global Financial company
Interesting article – most of these problems and more were solved in TimeKeeper years ago. But the most interesting part is the enormous engineering effort required to kind of get PTP to work.