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In the world of big data, choosing the right data storage solution can make a significant impact on the efficiency of your data processing workflows. Here, we will explore the advantages of moving away from HDFS (Hadoop Distributed File System) to DDN’s EXAScaler PFS (Parallel File System) and how this transition can revolutionize your data processing experience.

HDFS Disadvantages

HDFS, the stalwart of many big data ecosystems, is not without its flaws.

  • Data Redundancy Strategy: One significant drawback is its data redundancy strategy. HDFS stores three copies of data, resulting in a substantial increase in storage requirements. This 3x redundancy might have served its purpose in the past, but today, it’s an expensive and inefficient way to manage data.
  • HDFS Sort/Shuffle Operations: Moreover, HDFS demands a plethora of sort and shuffle operations to distribute and process data across its nodes. For those unfamiliar, sort operations organize data while shuffle operations involve redistributing and reorganizing data for processing within the Hadoop ecosystem. These operations, while essential, are notorious for being resource-intensive and time-consuming. They can lead to prolonged processing times, putting a strain on your Hadoop compute nodes.

Introducing DDN EXAScaler

DDN’s EXAScaler Parallel File System is a tried and true solution that addresses the limitations of HDFS head-on. The EXAScaler PFS is designed to optimize your data storage and processing experience, offering a more efficient and streamlined approach to data management.

EXAScaler Advantages

  • Reduced Overhead: EXAScaler requires a much lower overhead to implement full data resiliency, as little as 25%, making it a significantly more storage-efficient option compared to HDFS. This means you can store your data more economically without compromising on reliability.
  • Elimination of Sort/Shuffle: One of the standout features of EXAScaler is its elimination of the need for time-consuming sort and shuffle operations. This alone translates to improved resource utilization and, most importantly, much shorter run times for your Hadoop jobs.
  • Improved Utilization of Hadoop Compute Nodes: With DDN’s EXAScaler PFS, your Hadoop compute nodes are no longer bogged down by sorting and shuffling tasks. Instead, they can focus on what they do best—processing your data. This leads to a more efficient utilization of your compute resources and better overall performance.
  • Shorter Run Times for Hadoop: Perhaps the most compelling advantage of transitioning to EXAScaler is the significant reduction in run times for your Hadoop jobs as a result of this performance boost. The elimination of data-sorting bottlenecks means that your data processing tasks are completed faster, speeding up your workflow and saving you precious time.


In conclusion, the transition from HDFS to EXAScaler is a strategic move towards unlocking the full potential of your big data infrastructure. EXAScaler offers a more efficient, cost-effective, and performance-driven approach to data storage and processing, leaving the limitations of HDFS in the rearview mirror.

If you’re ready to embrace a future where data is stored intelligently and processed swiftly, consider making the switch to EXAScaler. Your Hadoop ecosystem will thank you for it.

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