Clusters in CNM Farms

CNM Cyber suites

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

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 CNM Cloud. 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 CNM Cloud stable, WorldOpp Federated, CNM EndUser, 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 the CNM Cyber Team, CNM Cloud Next 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.