You are designing a highly available virtual environment running on Windows Server 2008 R2.
The design must meet the following requirements:
. Provide high availability within the Production site to ensure that a failure of a node in the production site does not stop the cluster from running.
. Provide the ability to withstand a failure of the Disaster Recovery (DR) site.
. Minimize the number of nodes and votes in the cluster.
You need to design the virtual environment to meet the requirements.
What should you do?
To answer, drag the appropriate nodes and quorum configuration to the correct location or locations in the answer area.
Select and Place:
Correct Answer:
Explanation/Reference:
HIGH AVAILABILITY OF APPLICATION/SERVICE
A client/server application is an application that uses a central place (server) to store its data but is accessed from one or more client computers, e.g. SQL, Outlook/Microsoft Exchange, dynamic web-based applications.
Failover clustering provides high availability for client/server applications, DFS Namespace Server, DHCP Server, Distributed Transaction Coordinator (DTC), File Server, Internet Storage Name Service (iSNS) Server, Message Queuing, Print Server, Remote Desktop Connection Broker (formerly TS Session Broker), Virtual Machine and WINS Server.
Failover clustering is configured according to quorum. Quorum for a cluster is determined by the number of voting elements (active cluster members) for that cluster to start properly or continue running. Cluster configuration is stored in the nodes, disk witness and/or file share witness. There are 4 quorum configurations:
1. Node Majority (recommended for clusters with an odd number of nodes)
2. Node and Disk Majority (recommended for clusters with an even number of nodes)
3. Node and File Share Majority: An alternative to Node and Disk Majority by using a file share witness instead of a disk witness.
4. No Majority: Disk Only (not recommended by Microsoft): Can sustain failures of all nodes except one (if the disk is online). However, this configuration is not recommended because the disk might be a single point of failure.
** Comment: But how about providing high availability for the disk witness, e.g. RAID 1/5 with MPIO? Such a configuration maximizes the availability of the nodes!
http://technet.microsoft.com/en-us/library/cc731960.aspx
http://technet.microsoft.com/en-us/library/cc731739.aspx