Distributed File System (DFS) Data Storage Manager

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A Distributed File System (DFS) Data Storage Manager is a Data Storage Manager for a DFS.

See: Apache Hudi, Apache Iceberg, Delta Lake Framework.

References

2020

https://github.com/apache/hudi
- QUOTE: Apache Hudi (pronounced Hoodie) stands for Hadoop Upserts Deletes and Incrementals. Hudi manages the storage of large analytical datasets on DFS (Cloud stores, HDFS or any Hadoop FileSystem compatible storage). https://hudi.apache.org/
- Features
  - Upsert support with fast, pluggable indexing
  - Atomically publish data with rollback support
  - Snapshot isolation between writer & queries
  - Savepoints for data recovery
  - Manages file sizes, layout using statistics
  - Async compaction of row & columnar data
  - Timeline metadata to track lineage
- Hudi supports three types of queries:
  - Snapshot Query - Provides snapshot queries on real-time data, using a combination of columnar & row-based storage (e.g Parquet + Avro).
  - Incremental Query - Provides a change stream with records inserted or updated after a point in time.
  - Read Optimized Query - Provides excellent snapshot query performance via purely columnar storage (e.g. Parquet).

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Concept