Why cluster administration ensures reliability in Hadoop - Quick Recap

Recall & Review

beginner

What is cluster administration in Hadoop?

Cluster administration in Hadoop means managing and maintaining the group of computers (nodes) working together to store and process big data.

beginner

How does cluster administration help prevent data loss?

By monitoring node health and managing data replication, cluster administration ensures copies of data exist, so if one node fails, data is not lost.

beginner

Why is monitoring important in cluster administration?

Monitoring helps detect problems early, like slow or failed nodes, so they can be fixed before causing bigger failures.

intermediate

What role does fault tolerance play in cluster reliability?

Fault tolerance means the cluster keeps working even if some nodes fail, thanks to backup data and automatic task reassignment.

intermediate

How does cluster administration improve performance and reliability together?

By balancing workloads and fixing issues quickly, cluster administration keeps the system fast and reliable for users.

What is a key task of cluster administration to ensure reliability?

A Creating marketing plans

B Writing application code

C Designing user interfaces

D Monitoring node health

Monitoring node health helps detect and fix problems early, ensuring cluster reliability.

How does data replication help in cluster reliability?

A It deletes old data automatically

B It creates multiple copies of data across nodes

C It speeds up internet connection

D It compresses data to save space

Multiple copies mean if one node fails, data is still available on others.

What happens if a node fails in a well-administered Hadoop cluster?

A The cluster stops working completely

B The cluster needs to be restarted manually

C Tasks are reassigned to other nodes

D All data is lost

Automatic task reassignment keeps the cluster running smoothly.

Why is workload balancing important in cluster administration?

A To keep all nodes busy evenly and avoid overload

B To reduce the number of nodes

C To increase power consumption

D To slow down data processing

Even workload prevents some nodes from slowing down or failing.

Which of these is NOT a responsibility of cluster administration?

A Developing new Hadoop features

B Managing data replication

C Fixing hardware issues

D Monitoring cluster performance

Developing new features is done by software developers, not cluster admins.

Explain how cluster administration ensures reliability in a Hadoop environment.

Think about how admins keep the cluster running smoothly even if some parts fail.

Describe the role of fault tolerance and monitoring in maintaining cluster reliability.

Consider how the cluster handles failures and how admins keep an eye on system health.