NTP leap second data

This page describes the data used in the paper The Leap Second Behaviour of NTP Servers." presented at the 8th Traffic Monitoring and Analysis Workshop (TMA 2016).

The data is available as a large .tar.xz file. The file is approximately 1GB in size and contains approximately 19 million files, with md5 checksum 161a1608230805cc00765062df9d91b2. There are three subdirectories contained within this file.

• out: This contains a subdirectory for each year. Each subdirectory contains a files called listXXX.leap.YYYYMMDDHH, which indicate a parsing of the leap second indicator from the detailed requests sent. XXX is either 1, 2 or Pool, depending on if the list of results is from the public stratum 1 list, the public stratum 2 list or my subset of the Pool list. The format of the files is server result where, server is the IP or name of the server and result is leap=BB or blank.
• details: This contains a subdirectory for each YY/MMDDHH. Each subdirectory contains a files named after each queried server that responded, which includes the raw output of ntpq or ntpdate.
• err: This contains a subdirectory for each YYYY/MMDDHH. Each subdirectory contains a files named after each queried server that responded, which includes the raw stderr of the script running the test.