• Uber faced challenges with its massive HDFS (Hadoop Distributed File System) deployment, which was lowering the efficiency of its clusters. To fix this, its team modified settings to increase data transfer rates and parallelism. They also improved its HDFS Balancer algorithm to prioritize data movement to the least utilized nodes and use percentiles instead of fixed thresholds for better target selection. This led to much better cluster utilization and efficiency.

    Thursday, March 28, 2024