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45 Cards in this Set
- Front
- Back
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What is failover?
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In a server cluster, each computer is running the same critical applications, so that if one server fails, the others detect the failure and take over at a moment's notice.
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What is failback?
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When the failed node returns to service, the nodes take notice, and the cluster begins to use the recovered node again.
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T or F? Server Clustering is intended to provide availability for data, not applications.
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False. Server Clustering is intended to provide availability for applicaitons, not data.
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What is a stateful application?
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Server clusters designed for applications that have long-running in-memory states or large, frequently changing data sets. They include database servers such as SQL, E-mail and messing servers, and file and print services.
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How are computers (nodes) connected in a server cluster?
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Noes are connected to a common data set, such as storage devices on a SCSI bus or a storage area network (SAN)
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What is the difference between active and passive?
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Active nodes receive and process requests from clients, while a passive node remains idle and functions as a fallback should an active node fail.
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How do active and passive nodes work?
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Normally, the active node runs the database server application and receives requests from database clients and accesses the Network-Attched Storage device. When this fails, the passive node detects the failure, and becomes active.
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What is the disadvantage of using active/passive node designs? What is a better way?
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The passive nodes are normally doing nothing but functioning as a standby. Depending on the capabilities of the application, you can also design a server cluster with multiple actives nodes tht share teh processing among themselves.
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True or
False? A server cluster has its own anme and IP address separate from those individual computers in the cluster. |
True
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How many nodes in a Server cluster are supported by Enterprise Edition and Datacenter Edition of Microsoft 2003?
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They both support clusters of up to eight nodes. Standard Edition does not support clusters.
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Can you create a cluster with computers running different versions of the operating systems? (Enterprise and Datacenter, etc)
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NO
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What is Network Load Balancing?
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NLB is anohter type of clustering which adds high scalability. It is intended for applications with relatively small data sets that rarely change and do not have long-running in-memory states. These are called stateless applications.
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What is a stateless application?
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They typically include Web, File Transfer Protocol and Virtual private netowrk servers hosting state content.
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True or False?
All Nodes in a NLB are passive nodes? |
False
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How are nodes configured in an NLB?
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Instead of being connected to a single data source, as in a server cluster, the servers in an NLB cluster all have identical cloned data and all are aactive nodes.
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Why isn't NLB suitable for stateful applications such as database and e-mail servers?
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The cluster nodes do not share the same data. If one server in an NLB cluster were to receive a new record, the others would not have that record until the next database replication. Replication is an occasional event, not an ongoing occurrence.
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How about scalability in a NLB?
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When traffic increases, you simply add more servers to the cluster. Each server than has to process a smaller share of incoming requests.
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How many computers are supported by Enterprise, Datacenter Edition?
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up to 32 computers.
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What are the three types of failures that occur in clustering?
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Software failures, Hardware failures, and Site failures.
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What considerations should you take into account when planning availability requirements?
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The nature of application you are running, size, location and distribution of your user base, and the role of the application in your organization.
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How do you quantify availability?
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A Percentage reflecting the amount of time that an application is up and running.
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What does achieving a specific level of abailability involve?
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Might need fault-tolerant hardware, might need an extensive hardware and software evaluatin and testing plan, estblish opertional policies for the entire IT department. Expense is also a consideration.
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How do you scale up?
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By upgrading the computer's hardware, improving server performance
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How do you scale out?
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Add servers to an existing cluster. It is easier to add servers to an NLB cluster.
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Windows Server 2003, Standard edition has how many Server Clusters?
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A. 8
B. 16 C. 0 D. 4 |
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Windows server 2003 Enterprise Edition Supports how many clusters?
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A. 8
B. 16 C. 0 D. 4 |
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Windows Server 2003 Datacenter supports how many Server clusters?
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A. 8
B. 16 C. 2 D. 4 |
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Windows 2000 Advanced Server supports how many server clusters?
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A. 8
B. 16 C. 2 D. 4 |
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Windows 2000 Datacenter Server supports how many clusters?
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A. 8
B. 16 C. 2 D. 4 |
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Windows Server Standard Edditions NLB supports how many clusters?
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A. 16
B. 4 C. 32 D. 8 |
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How many server clusterws are supported in Windows 2003 Enterprise edition?
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A. 2
B. 8 c. 0 d. 4 |
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How many server clusters are supported in Windows Server 2003 Datacenter Edition?
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A. 8
B. 0 C. 2 D. 4 |
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How many server clusters are suppored in Windows w000 Advanced Server?
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A. 4
B. 2 C. 8 D. 0 |
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How many Server clusters are supported in Windows 2000 Datacenter Server
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A. 0
B. 8 C. 4 D. 2 |
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What is the maximum number of processors in Windows Server 2003, Standard Edition?
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A. 32
B. 8 C. 4 |
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What is the maximum number of processors in Windows Server 2003 Enterprise Edition?
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A. 8
B. 32 C. 4 |
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What is the maximum number of processors in Windows Server 2003 Datacenter Edition?
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A. 4
B. 16 C. 32 D. 8 |
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What is the maximum number of processors in Windows 2000 Advanced Server?
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a. 8
B. 16 C. 4 D. 32 |
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What is the maximum number of processors in Windows 2000 Datacenter Server?
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A. 32
B. 4 C. 16 D. 8 |
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What is the Maximum Ram in Windows Server 2003 Standard Edition?
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A. 16 GB
B. 8 GB C. 64 GB D. 4 GB |
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What is the maximum ram in Windows Server 2003 Enterprise Edition?
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A. 64 GB
B. 4 GB C. 8 GB D. 32 GB |
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What is the Maximum Ram in Windows Server 2003 Datacenter Edition?
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A. 32 GB
B. 8 GB C. 64 GB D. 4 GB |
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What is the Maximum Ram in Windows Server 2000 Advanced Server?
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A. 8 gb
B. 64 GB C. 4 GB D. 32 GB |
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What is the Maximum Ram in Windows 2000 Datacenter Server?
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A. 32 GB
B. 8 GB C. 4 GB D. 64 GB |
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Can servers in a cluster run multiple applications?
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yes
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