HDFS is a Java-based file system that provides scalable and reliable data storage, and it was designed to span large clusters of commodity servers. HDFS has demonstrated production scalability of up to 200 PB of storage and a single cluster of 4500 servers, supporting close to a billion files and blocks.
Segment is a customer data hub that can collect and load your user tracking analytics data into a SQL database.
Bring all your Segment data to Amazon Redshift
Load your Segment data to Google BigQuery
ETL all your Segment data to Snowflake
Move your Segment data to MySQL