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10 May 09

GoogleTalk Architecture | High Scalability

  • Measure the right thing.

    - People ask about how many IMs do you deliver or how many active users. Turns out not to be the right engineering question.

    - Hard part of IM is how to show correct present to all connected users because growth is non-linear: ConnectedUsers * BuddyListSize * OnlineStateChanges

    - A linear user grown can mean a very non-linear server growth which requires serving many billions of presence packets per day.

    - Have a large number friends and presence explodes. The number IMs not that

    big of deal.
29 Aug 06

HOWTO: Make google talk voice calls - Ubuntu Forums

  • This post will show you how to install a program on ubuntu which can actually make voice calls to other google talk users. Unfortunately, it's not in a stable version yet so we will have to compile the source. This is a development branch of the psi jabber client, being called psi-jingle.
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