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<VOIP> スカイプの障害はスーパーノードだが詳細な原因不明!!


  スカイプには現在、124百万人が参加しています。
 2010年12月22日の水曜日に落っこちたスカイプですが、完全普及とまではいっていないようです。23日の木曜日の午後三時(米国東部時間)90-95%はノーマルに復帰ましたが(既に17.6百ー2千万人が同時通話中)、まだ問題があるそうです。原因はスーパーノードと言う各地のサーバーに問題があり、そのためIMやビデオ会議の為のサーバーで代替運用しているみたいです。スーパーノードの問題と言うことはソフトの基本的な欠陥との見方がでています。
  ★★ Skype Struggles to Restore Its Service and Reputation
http://bits.blogs.nytimes.com/2010/12/23/skype-struggles-to-restore-its-service-and-reputation/?ref=technology

Skype’s collapse started Wednesday morning. Although the company assured users it would restore service in a few hours, the problems continued through Thursday. “It took a little longer than the initial estimates from the team,” Mr. Bates said. As of around 3 p.m. E.D.T. Thursday, Mr. Bates said that Skype had 17.6 million to 20 million users simultaneously online, or around 90 to 95 percent of normal. Some users may still be having difficulties making calls, he acknowledged, but said that, if so, it is because the company is trying to restore service in a controlled manner.
Skype’s problems are with what are called “supernodes,” computers among its network of 124 million users that serve as phone directories and help connect calls. For unknown reasons, they were taken offline, leaving the network in chaos. Mr. Bates declined to reveal how many supernodes exist. Skype’s users are not told whether they host a supernode.
So given the troubles with supernodes, is Skype rethinking its reliance on them? Mr. Bates said they are fundamental to how Skype operates. In any case, Skype technicians are creating new nodes on internal servers by displacing server space normally dedicated to Skype’s instant messaging and group video conferencing. As a result, those services may not be restored to normal for a few days.

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