Why replication is needed in MongoDB - Quick Recap

Recall & Review

beginner

What is replication in MongoDB?

Replication in MongoDB is the process of copying data from one database server to another to ensure data availability and redundancy.

beginner

Why is replication important for data availability?

Replication helps keep data available even if one server fails, by having copies of the data on other servers ready to take over.

intermediate

How does replication help with disaster recovery?

Replication creates copies of data on multiple servers, so if one server is lost due to disaster, the data is still safe on others.

intermediate

What role does replication play in load balancing?

Replication allows read operations to be spread across multiple servers, reducing load on the primary server and improving performance.

intermediate

Can replication improve fault tolerance? How?

Yes, replication improves fault tolerance by having multiple copies of data, so if one server fails, others can continue serving data without interruption.

What is the main purpose of replication in MongoDB?

A To delete old data automatically

B To copy data across servers for availability

C To speed up data entry

D To encrypt data

Replication copies data to multiple servers to keep it available if one server fails.

How does replication help during a server failure?

A It backs up data to a USB drive

B It deletes the failed server's data

C It stops all database operations

D It switches to another server with the same data

Replication allows another server with the same data to take over, keeping the database running.

Which of these is NOT a benefit of replication?

A Faster data deletion

B Load balancing

C Disaster recovery

D Improved data availability

Replication does not speed up data deletion; it focuses on data copying and availability.

Replication can help with load balancing by:

A Allowing multiple servers to handle read requests

B Increasing write speed on one server

C Deleting duplicate data

D Encrypting data transfers

Multiple servers with replicated data can share read requests, reducing load on one server.

What happens if a disaster destroys the primary MongoDB server without replication?

A Replication creates new data

B Data automatically recovers

C Data is lost if no backup exists

D The server fixes itself

Without replication or backup, data on the destroyed server is lost.

Explain why replication is needed in MongoDB and how it helps keep data safe.

Think about what happens if one server stops working.

Describe how replication can improve performance and reliability in a MongoDB setup.

Consider how multiple copies of data can share work and handle failures.