Exchange High availability

High availability consideration

Business continuity impact

Impact time-highly available

Data impact-disaster recovery

Hardware redundancy (highly available)

Application redundancy (Exchange) client connections: Exchange 2016 cancels support for NLB using HLB solution DNS polling solution for Exchange 2016 (not recommended) HLB solution: load balancing High availability https : / / docs.microsoft.com/zh-cn/SkypeForBusiness/certification/infra-load-balancers efficient commercial HLB vendors open source HLB http://louwrentius.com/overview-of-open-source-load-balancers. Html Zen Load Balancer http://c-nergy.be/blog/?p=1485 Transport Service Hub Transport Service (HUB): high availability databases are automatically configured in Exchange 2016 with the high availability of mail servers Exchange database high availability group (DAG): server and database dual high availability server: when the server fails Implementation of failover database through Exchange DAG: high availability of multiple database replicas each database will have more than one database copy, the same data will be achieved through replica synchronization, one database copy will be active, and the other database copies will be passive. When the active database fails, Database copies in other passive states can be activated automatically High availability can also be planned: cross-site DAG DAG status check DAG planning and configuration DAG planning hardware: Network card: Exchange server configures dual network card One of them is dedicated to DAG network-database replica synchronous storage: add separate LUN database fragmentation for each Exchange server: multiple user mailbox databases Consider when a failover occurs The hardware (CPU and memory) of the server where other database copies reside can support the number of users that can be supported. Configure DAG AD configuration to create a security group with the same name as the DAG group-add the Exchange server to the group Members-create a virtual computer with the same name as the DAG group after you "belong" to the-Exchange Trusted Subsystem group-add the DAG security group to the computer's security For full control permissions-disable the creation of DAG group shared folders for this computer account: create shared folders on servers other than Exchange servers for DAG cluster witness-this folder permissions-DAG groups have full control Create DAG groups in ExchangeEAC-define the network of DAG groups-add group member servers add replicas add database replicas in database