[Exchange 2010] 12 Gestion de la haute disponibilité

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Publié le : 15/08/2011 vers 2h
Mise à jour le : 08/10/2011 vers 0h
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Loïc THOBOIS (Membre depuis le 04/09/2007)
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12.1 Composants de la haute disponibilité Exchange

Afin de réduire les risque d’indisponibilité de service, il est important d’éviter le point de cassure unique dans l’infrastructure de messagerie (SPOF – Single Point Of Failure).

Ainsi, la fiabilité réseau, matériel, logiciel doit être surveillée et une redondance doit permettre la perte de n‘importe lequel des composants de l’infrastructure sans perte d’accès au service.

Pour la partie système, deux technologies permettent la haute disponibilité des machines et des logiciels :

Le Network Load Balancing (NLB – Répartition de charges réseau)

Indépendant de l’application, il permet la répartition de charges des clients sur la ferme de serveur en plus de la haute disponibilité.

Le Failover clustering (WSFC - Cluster de basculement)

Lié à l’application, il permet de maintenir l’intégrité des données utilisé par le logiciel en garantissant que l’accès aux disques stockant les fichiers ne se fait que par une machine à la fois.

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