Des services web 2.0 qui sont inaccessibles

Dans un Twitt récent, je m’offusquais des problèmes d’accessibilités de Twitter, de Facebook ou même de blogger. C’est certainement un alignement exceptionnel des astres qui fait que tous ces services disparaissent du Web pour quelques minutes, voire quelques heures? Michael Arrington s’en inquiète aussi et questionne Twitter :

• Is it true that you only have a single master MySQL server running replication to two slaves, and the architecture doesn’t auto-switch to a hot backup when the master goes down?
• Do you really have a grand total of three physical database machines that are POWERING ALL OF TWITTER?
• Is it true that the only way you can keep Twitter alive is to have somebody sit there and watch it constantly, and then manually switch databases over and re-build when one of the slaves fail?
• Is that why most of your major outages can be traced to periods of time when former Chief Architect/server watcher Blaine Cook  wasn’t there to sit and monitor the system?
• Given the record-beating outages Twitter saw in May after Cook was dismissed, is anyone there capable of keeping Twitter live?
• How long will it be until you are able to undo the damage  Cook has caused to Twitter and the community?

Mais c’est probablement Geekandpoke qui a la réponse