Apache Kudu
Apache Kudu is an open-source columnar storage engine designed for fast analytics on rapidly changing data. It provides a hybrid architecture that combines the low-latency random access of traditional databases with the high-throughput sequential access of data warehouses. Kudu integrates with the Hadoop ecosystem, allowing real-time analytics on data that is continuously updated.
Developers should learn Apache Kudu when building real-time analytics applications that require both fast ingest of new data and efficient querying, such as IoT data processing, financial trading systems, or clickstream analysis. It is particularly useful in scenarios where data needs to be updated frequently while supporting complex analytical queries, bridging the gap between OLTP and OLAP systems.