Difference between revisions of "Clusters in CNM Farms"

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[[File:Cnm-digital.png|400px|thumb|right|[[CNM Cyber]]]][[Redundancies of CNM Cloud]] (hereinafter, the ''Lectio'') is the [[lectio|lesson part]] of the '''[[CNM Cloud Features]]''' [[lesson]] that introduces its participants to [[CNM Cloud]]. This ''lesson'' belongs to the [[Introduction to CNM Cloud]] session of the [[CNM Cyber Orientation]].
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[[File:Cnm-digital.png|400px|thumb|right|[[CNMCyber suite]]s]][[Clusters in CNM Farms]] (hereinafter, the ''Lectio'') is the [[lectio|lesson part]] of the '''[[CNM Farm Essentials]]''' [[lesson]] that introduces its participants to [[Opplet]]. This ''lesson'' belongs to the [[Introduction to CNM Cloud]] session of [[EmployableU Concepts]].
  
  
 
==Content==
 
==Content==
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The successor predecessor [[lectio]] is [[What the Foundation Is]].
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The predecessor [[lectio]] is [[Data at CNM Farms]].
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===Key terms===
 
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:'''[[CNM Cloud Foundation]]'''. The combination of [[computing server]]s that host [[CNM Cloud]], as well as those parts of the cloud that are provisioned to run [[serverless]] systems.<div style="background-color:#efefef; padding: 5px; margin: 15px;">
 
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:*'''[[WorldOpp Federated Servers]]'''. The [[computing server]] that hosts the [[software application]]s that [[WorldOpp Middleware]] powers. The [[CNM Next Servers]] is one of the [[CNM Cloud Foundation]].
 
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:*'''[[CNM Next Servers]]'''. The [[computing server]] that hosts those non-federated [[end-user application]]s of [[CNM Cyber]] that the [[CNM Cyber Team]] administers. The ''Server'' is located at the [http://167.71.244.79 167.71.244.79] [[IP address]]. The [[CNM Next Servers]] are ones of the [[CNM Cloud Foundation]]. Another server, the [[CNM Fellow Servers]], hosts the set of [[CNM app]]s that is identical to [[CNM Next Servers]]' set.
 
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:*'''[[CNM HandsOn Servers]]'''. The [[computing server]] of [[CNM Cloud Foundation]] that the [[CNM Cyber Team]] administers.
 
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:*'''[[CNM Fellow Servers]]'''. The [[computing server]] that hosts those non-federated [[end-user application]]s of [[CNM Cyber]] that the [[WorldOpp Fellow Staff]] administers. The ''Server'' is located at the [http://159.89.230.212 159.89.230.212] [[IP address]]. The [[CNM Fellow Servers]] is one of the [[CNM Cloud Foundation]]. Another server, the [[CNM Next Servers]], host the set of [[CNM app]]s that is identical to Fellow Server's set. The difference is that Fellow Server's apps are used for [[career service]]s, while Next Server's ones are used for [[hands-on training]].</div>
 
  
 
===Script===
 
===Script===
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:If we imagine that [[CNM app]]s are people, we may treat the [[CNM Cloud Foundation]] as their homes. The [[cloud infrastructure]] would serve as the roofs and walls, [[web server]]s would serve as the mailboxs, [[operating system]]s would be the electric systems, [[programming language]] support would be its water and sewage infrastructure, and [[database management system]]s would be the storage.
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:Backups are used to restore the data, but they cannot prevent work interruptions. Imagine that you are in the middle of exam or another project at [[Opplet]]. If its [[computing server]] fails, you should wait until the latest backup is restored. Plus, your latest data, most likely, would be lost.
  
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:The [[computing server]]s are the core of [[CNM Cloud Foundation]]. In [[information technology]], a [[computing server]] is any resource that provides functionality for [[software application]]s.
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:To make [[Opplet]] stable, [[CNM Fed Farm]], [[CNM Bureau Farm]], and [[CNM HandsOn Farm|HandsOn Farm]] are run in [[computing cluster]]s. Each cluster includes two or more identically-functioning ''servers''. If one of them fails or is not available, another would continue running. This feature of the [[CNM Farms]] is called [[redundancy]].
  
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:All ''Foundation's'' [[computing server]]s are grouped in clusters; there are four types of clusters of servers.
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:Special [[load balancer]]s make sure that the ''servers'' in one ''cluster'' work synchronously to cover for each other and the ''Cloud'' users access the ''server'' that serves them best.
  
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:First, the [[WorldOpp Federated Servers]] hosts [[WorldOpp Middleware]] and all [[software application]]s that this ''middleware'' powers. Most notably, the ''Federated Server'' hosts [[CNM Cabin]].
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:No user, but the ''Farms'' administrators, can detect that feature. Any ''cluster'' acts as a single [[computing server]]; only an emergency can possibly help to identify the ''Cloud's redundancies''.
  
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:The [[CNM HandsOn Apps]] are installed on [[CNM HandsOn Servers]]. [[CNM Next Servers]] host the [[CNM Next Apps]], so the [[CNM Fellow Servers]] do the [[CNM EndUser Apps]].
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:To accommodate experiments of [[CNMCyber Team]], [[CNM Lab Farm]] is more flexible than the other, more ''conservative'', parts. Depending on the experiments' nature, this part of the ''Farms'' may have any number of server clusters or no clusters at all.
  
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:In that way, the [[CNM Cloud Foundation]] provides functionality for both [[CNM app]]s and [[WorldOpp Middleware]].
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===Key terms===
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:[[Computing cluster]], [[load balancer]]
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===Closing===
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:Is the concept of [[computing cluster]]s and [[redundancy]] explained well?--- Yes/No/I'm not sure
  
 
'''[[What the Middleware Is]]''' is the successor [[lectio]].
 
'''[[What the Middleware Is]]''' is the successor [[lectio]].
  
 
==Questions==
 
==Questions==
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===Lectio quiz===
 
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:The answer is recorded for the lectio completion purpose:
 
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:*[[CNM Cabin]] is hosted by:<ol type="a"><li>[[CNM Next Servers]]</li><li>[[WorldOpp Federated Servers]]</li><li>[[CNM Fellow Servers]]</li><li>[[CNM HandsOn Servers]]</li><li>None of the other answers is correct.</li></ol>
 
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:*Which statement below is correct:<ol type="a"><li>[[CNM Cyber]] may include three identical [[CNM app]]s.</li><li>While taking this course, you work on the [[CNM Fellow Servers]].</li><li>Future administrators of [[CNM app]]s get [[hands-on training]] at the [[CNM Next Servers]].</li><li>All of the other substantive answers are correct.</li><li>None of the other answers is correct.</li></ol>
 
  
 
===Placement entrance exam===
 
===Placement entrance exam===

Latest revision as of 14:06, 11 December 2023

CNMCyber suites

Clusters in CNM Farms (hereinafter, the Lectio) is the lesson part of the CNM Farm Essentials lesson that introduces its participants to Opplet. This lesson belongs to the Introduction to CNM Cloud session of EmployableU Concepts.


Content

The predecessor lectio is Data at CNM Farms.

Script

Backups are used to restore the data, but they cannot prevent work interruptions. Imagine that you are in the middle of exam or another project at Opplet. If its computing server fails, you should wait until the latest backup is restored. Plus, your latest data, most likely, would be lost.
To make Opplet stable, CNM Fed Farm, CNM Bureau Farm, and HandsOn Farm are run in computing clusters. Each cluster includes two or more identically-functioning servers. If one of them fails or is not available, another would continue running. This feature of the CNM Farms is called redundancy.
Special load balancers make sure that the servers in one cluster work synchronously to cover for each other and the Cloud users access the server that serves them best.
No user, but the Farms administrators, can detect that feature. Any cluster acts as a single computing server; only an emergency can possibly help to identify the Cloud's redundancies.
To accommodate experiments of CNMCyber Team, CNM Lab Farm is more flexible than the other, more conservative, parts. Depending on the experiments' nature, this part of the Farms may have any number of server clusters or no clusters at all.

Key terms

Computing cluster, load balancer

Closing

Is the concept of computing clusters and redundancy explained well?--- Yes/No/I'm not sure

What the Middleware Is is the successor lectio.

Questions

Placement entrance exam

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