Connection/Network status

Network connectivity

checkAddr command will create a TCP socket (basic connection) to specified ip/port destination (or to defaults)

alien.py checkAddr -h
checkAddr [reference] fqdn/ip port
defaults are: alice-jcentral.cern.ch 8097
reference arg will check connection to google dns and www.cern.ch

Tip

reference argument will add checking of google dns and www.cern.ch

Network latency

ping command will time the ping/pong dialogue of the websocket connection to ALICE central services.

alien.py ping <count> # where count is the number of samples

Tip

this return network RTT and the server answer latency
it requires a succesful authorization so, it is also a check for SSL websocket connection