Pinger and IEPM-BW activity at FNAL By Frank Nagy FTP/CCF Computing Division Fermilab
Ping. ER deployment • Measurements from – 37 monitors (Beacons) in 15 countries –Over 790 remote hosts – 79+ countries –Over 10000 monitor-remote site pairs Countries monitored –Contain 78% of world population – 99% of online users of Internet –Mainly A&R sites –Measurements go back to Jan-95, FNAL’s archive started at 1997 –Reports on RTT, loss, reachability, jitter, reorders, duplicates …
Ping. ER Measurement Methodology • Measurement host admin choose remote hosts of interest –sends 21 pings each 30 mins to each chosen remote host –Records RTT, loss, jitter, unreachable, out of order … –Records data in local cache • Archive host gathers data from measurements hosts regularly (at least daily) –Archives, analyzes and generates reports from data –Make reports and data publicly available via the web • Requirements: –Remote host: need a host accessible to pings, and a contact in case host does not respond (almost no effort) –Monitoring host: a low end host to make measurements, file space for cache, admin to install toolkit, choose remote hosts, build configuration file, respond to archives in case unable to get data & keep it running (<<10% FTE) –Archive site: probably about 20% of an FTE
Measurement Architecture • Uses existing ubiquitous Internet ping infrastructure, no tools to install • Hierarchical vs. full mesh, each monitoring site chooses remote sites • Lightweight – low network impact (100 bits/s/path) – no special machines – trivial to add monitored sites WWW SLAC Ping Reports & Data Archive Cache HTTP Archive FNAL Monitoring 1 monitor host remote host pair Remote Monitoring Remote
Ping World
Countries in Ping. ER Data. Base* Albania Argentina Armenia Australia Austria Azerbaijan Bangladesh Belarus Belgium Brazil Bulgaria Canada China Chile Colombia Costa Rica Croatia Cuba CZ DK Egypt Estonia Finland France Georgia Germany Ghana Greece Guatemala Hungary Iceland India Indonesia Ireland Iran Israel Italy Japan Jordan Kazakhstan Korea, Republic Of Latvia Lithuania Macedonia Malaysia Mexico Mongolia Moldova, Republic of Netherlands Nigeria Norway New Zealand Pakistan Peru Poland Portugal Puerto Rico Romania Russia Singapore Slovakia Slovenia South Africa Spain Sweden Switzerland Taiwan Thailand Turkey * Means we monitored a host in this country at one time or another Uganda Ukraine United Kingdom US Uruguay Uzbekistan Venezuela Viet Nam Yugoslavia
45 days throughput statistics for monitoring site at UK and Canada
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