Clustering of Exchnage server
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Clustering of Exchnage server

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Clustering of Exchnage server

Clustering of Exchnage server

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Clustering of Exchnage server Clustering of Exchnage server Presentation Transcript

  • INSTALLING MICROSOFT EXCHANGE SERVER 2003 CLUSTERS AND FRONT-END AND BACK‑END SERVERS
  • OVERVIEW
    • Clustering Exchange Server 2003 servers
    • Installing Exchange Server 2003 on a Microsoft Windows Server 2003 cluster
    • Managing an Exchange Server 2003 cluster
    • Configuring Exchange Server 2003 in a front-end and back-end configuration
  • CLUSTERING EXCHANGE SERVER 2003 SERVERS
    • Supported clustering types
    • Network load balancing
    • Microsoft Cluster service
    • Cluster service configurations
    • Failover configurations
    • Active/active and active/passive
    • Clustering components
  • SUPPORTED CLUSTERING TYPES
    • Network load balancing
    • Microsoft Cluster service
  • NETWORK LOAD BALANCING
    • Configured through the Network Load Balancing Manager
    • Runs as a driver in Microsoft Windows
    • Distributes incoming requests across each node in the cluster
    • Can contain as few as 2 nodes and as many as 32 nodes
  • NETWORK LOAD BALANCING (CONT.)
    • Distributes TCP/IP traffic between the cluster nodes
    • Only works with TCP/IP
    • No special hardware is required
    • Servers are not required to be members of a domain
  • THE LOAD BALANCED CLUSTER
    • Seen as a single resource
    • Operates by default in Unicast mode
    • Addressed by a single IP address
    • Each node also retains its own unique IP address
    • Applications are installed individually on each node
  • NETWORK LOAD BALANCING ON MULTIHOMED SERVERS
    • Advantages to using two network cards:
      • Increases the fault tolerance of the individual server
      • Enables communication between cluster nodes
  • HEARTBEATS
    • Network packets emitted every second by each node in a cluster
    • When a node goes offline, its heartbeats stop
    • After five seconds the remaining nodes in the cluster begin to remove the unresponsive server
    • This process is called convergence
    • Convergence also redirects incoming client requests to other nodes for handling
  • MICROSOFT CLUSTER SERVICE
    • A cluster appears as a single network resource to client computers
    • Application and service aware
    • Full failover protection for both servers and applications
    • Does not load balance
    • Requires a cluster storage device
  • MICROSOFT CLUSTER SERVICE FEATURES
    • Requires Windows Server 2003 Enterprise Edition or Datacenter Edition
    • Up to eight-node clusters supported
    • Each cluster node must be running the same operating system version
    • Restrictions relaxed for a two-node cluster
    • Servers must all be members of the same domain
  • CLUSTER SERVICE CONFIGURATIONS
    • Single node server clusters
    • Single quorum device server clusters
    • Majority node set server clusters
  • CLUSTER STORAGE DEVICE REQUIREMENTS
    • The cluster storage device cannot use:
      • Integrated Device Electronics (IDE) disks
      • Software RAID
      • Dynamic volumes
      • Mount points or mounted volumes
      • Encrypting File System
      • Remote storage
  • Cluster Hardware Configuration
    • Shared Small Computer System Interface (SCSI) bus
    • Fast, reliable network card to the local area network (LAN)
    • Network card to the private area network
  • ACTIVE/ACTIVE AND ACTIVE/PASSIVE CLUSTERS
    • Active/active clusters limited to two nodes
    • Active/active clusters support up to 1900 concurrent client connections
    • Active/passive clusters can consist of up to eight nodes
    • Active/passive clusters scale to significantly higher numbers
    • Active/passive clusters generally more reliable
    • Message transfer agent (MTA) always active/passive
  • Two-Node Hardware Configuration
  • The Small Computer System Interface (SCSI) Reserve Command
  • Active/Active Clustering
  • Failover and Failback Procedures
  • Clustering Support in Exchange 2003 Server
    • Server installation
    • Resource groups
    • Virtual servers
  • INSTALLING EXCHANGE SERVER 2003 ON A WINDOWS SERVER 2003 CLUSTER
    • Similar to a normal installation
    • First prepare the Windows Server 2003 cluster servers
    • Cluster service automatically installed on Windows Server 2003
    • Need to configure the Cluster service using Cluster Administrator
  • NEW SERVER CLUSTER WIZARD
  • THE NEW CLUSTER
  • INSTALLING EXCHANGE 2003
    • Install Microsoft Distributed Transaction Coordinator (MSDTC)
    • Run ForestPrep
    • Run DomainPrep
    • Install Exchange Server 2003 on each node of the cluster
    • Use the Cluster Administrator console to configure the Exchange Server 2003 virtual servers
    • Assign the Cluster service account the Exchange Full Administrator role
  • MANAGING AN EXCHANGE SERVER 2003 CLUSTER
    • Creating an Exchange Server 2003 virtual server
    • Managing Exchange Server 2003 Clustered services
  • CREATING AN EXCHANGE SERVER 2003 VIRTUAL SERVER
    • Two-node active/passive Exchange Server 2003 cluster
      • One Exchange Server 2003 virtual server
    • Two-node active/active Exchange Server 2003 cluster
      • Two Exchange Server 2003 virtual servers
  • EXCHANGE SERVER 2003 VIRTUAL SERVER RESOURCE REQUIREMENTS
    • Static IP address
    • Unique network name
    • Shared physical disk
    • Exchange System Attendant resource
  • RESOURCES CREATED BY EXCHANGE SYSTEM ATTENDANT
  • MANAGING EXCHANGE SERVER 2003 CLUSTERED SERVICES
    • Managed in Cluster Administrator
    • Most default settings are adequate
    • Might want to reconfigure failover and failback
  • CONFIGURING INDIVIDUAL RESOURCE PROPERTIES
  • TESTING POLICIES
    • Test the restart, failover, and failback policies
    • Right-click a resource and select Initiate Failure
    • Manually stop the Cluster service on a server node
    • Start the service again and test the failback policy
  • CONFIGURING EXCHANGE SERVER 2003 IN A FRONT-END AND BACK-END CONFIGURATION
    • Configuring Exchange Server 2003 as a front-end server
    • Front-end and back-end servers and clustering
  • CONFIGURING EXCHANGE SERVER 2003 AS A FRONT-END SERVER
    • Front-end servers relay Internet traffic to back-end servers on the internal network
    • Cannot host a Recipient Update Service
    • Cannot host offline address lists
    • Mailbox Management service must be removed
    • Free and busy service must be removed
  • ADDITIONAL CONSIDERATIONS
    • If the front-end server accepts Simple Mail Transfer Protocol (SMTP) mail from Internet-based clients:
      • Start the Microsoft Exchange Information Store service
      • Mount at least one mailbox store
      • Ensure that user mailboxes are not stored in the mailbox store
    • Do not delete the First Storage Group object
    • One front-end server for every four back-end servers recommended
  • FRONT-END SERVERS AND CLUSTERING
    • Do not host user data
    • Well suited for using network load balancing
    • Up to 32 nodes in a cluster
    • Cluster service Internet-based clients connect through:
      • Outlook Web Access (OWA)
      • Post Office Protocol version 3 (POP3)
      • Internet Message Access Protocol version 4 (IMAP4)
  • FRONT-END SERVERS AND CLUSTERING (CONT.)
    • Cluster functions as a single entity to client requests
    • Cluster relays traffic between the client computer and the back-end server
  • BACK-END SERVERS AND CLUSTERING
    • Host user mailboxes and public folders
    • Well suited for the Microsoft Cluster service
    • Complete failover protection is typically required
    • Map each front-end server to all back-end server nodes
    • Communication between front-end and back-end servers goes through TCP port 80
  • SUMMARY
    • Microsoft Cluster service and network load balancing
    • Installing Exchange Server 2003 on cluster nodes
    • Managing clusters
    • Front-end and back-end servers