Question

In the first week of your job, you are asked to build a distributed system to execute jobs in a priority sequence. How would you ensure data consistency in your system?

A. Implementing a distributed lock mechanism
B. Using a single-node architecture for simplicity
C. Relying on eventual consistency principles
D. Prioritizing performance over data consistency

Answer 1

To ensure data consistency in a distributed system executing jobs in a priority sequence, implementing a distributed lock mechanism is recommended.

Step-by-step explanation:

Distributed systems are designed to execute jobs across multiple machines, which can introduce challenges of data consistency. To ensure data consistency in a distributed system that executes jobs in a priority sequence, one approach is to implement a distributed lock mechanism.

Using a distributed lock mechanism ensures that only one job is executed at a time, preventing data inconsistency caused by concurrent access. This mechanism can be implemented using algorithms like Lamport's Bakery algorithm or the distributed lock manager.

By implementing a distributed lock mechanism, the system can guarantee that jobs are executed sequentially in a priority sequence, maintaining data consistency throughout the execution process.