Netsplit

In computer networking, mainly Internet Relay Chat (IRC), netsplit is the event when two servers disconnect. Because how IRC networks are built, a disconnection between two servers splits the entire network into two parts. This makes it look like people on the other half of the network have quit from IRC.

A normally functioning network: Bob, Joe and Sara can all see each other.
A network on which a netsplit has occurred: Bob sees Joe quitting, Joe sees Sara and Bob quitting.

Appearance of netsplits

Below is an example of typical netsplit. When two servers split, a user sees this as large number of users quitting. After the servers are reconnected, a user sees the other users rejoining.

A typical netsplit in the X-Chat aqua IRC client.
On GUI IRC clients
* usera has quit (a.irc.net b.irc.net)
* userb has quit (a.irc.net b.irc.net)
* userc has quit (a.irc.net b.irc.net)
* usera has joined #channel
* userb has joined #channel
* userc has joined #channel
On command-line client irssi
00:00 -!- Netsplit a.irc.net <-> b.irc.net quits: usera, userb, userc
00:00 -!- Netsplit over, joins: usera, userb, userc
To a user on a private network
* usera has quit (*.net *.split)
* userb has quit (*.net *.split)
* userc has quit (*.net *.split)
* usera has joined #channel
* userb has joined #channel
* userc has joined #channel

References
  • Bidgoli, Hossein (2004). The Internet Encyclopedia. John Wiley & Sons. ISBN 978-0-471-22204-0.

Other websites
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