https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, and data engineering — plus mindset essays on confidence, routines, health, and sport psychology. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Wed, 12 Aug 2026 00:00:00 GMT https://www.youngju.dev/blog/opensource/2026-08-12-fading-data-stores-and-queues.en https://www.youngju.dev/blog/opensource/2026-08-12-fading-data-stores-and-queues.en Ten projects in the data layer that gave up their place or had their distribution terms changed, documented using only official announcements and Apache Attic records as evidence. The license changes at Redis, Elasticsearch and MongoDB and the Valkey and OpenSearch forks that followed, stated as facts without ascribing motives; how ZooKeeper left Kafka; Sqoop, Oozie, Giraph and Tajo moving to the Apache Attic; RethinkDB going to the Linux Foundation after the company wound down; and PrestoSQL renaming itself Trino over a trademark. Each entry is split into what it was, why it was right at the time, what changed, what took its place, what it left behind, and when it is still the correct choice. Every status claim was checked against the original source on 12 August 2026. Wed, 12 Aug 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) open-sourcedatabasekafkarediselasticsearchlicenseapachedeprecation https://www.youngju.dev/blog/opensource/2026-08-12-fading-data-stores-and-queues.ja https://www.youngju.dev/blog/opensource/2026-08-12-fading-data-stores-and-queues.ja データ層で場所を譲った、あるいは配布条件が変わったプロジェクト10個を、公式発表とApache Atticの記録だけを根拠に整理します。Redis、Elasticsearch、MongoDBのライセンス変更とそこから生まれたValkey、OpenSearchのフォークを事実だけで扱い、KafkaからZooKeeperが外れた経緯、Apache Atticへ移管されたSqoop、Oozie、Giraph、Tajo、会社の終了後にLinux Foundationへ渡ったRethinkDB、商標の問題で名前を変えたPrestoSQLとTrinoを見ていきます。各項目は、何だったのか、なぜ当時は正しかったのか、何が変わったのか、何がその場所に来たのか、何を残したのか、いまでも使うのが正しい場合、に分けています。状態情報は2026年8月12日に原典で直接確認しました。 Wed, 12 Aug 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) open-sourcedatabasekafkarediselasticsearchlicenseapachedeprecation https://www.youngju.dev/blog/opensource/2026-08-12-fading-data-stores-and-queues https://www.youngju.dev/blog/opensource/2026-08-12-fading-data-stores-and-queues 데이터 계층에서 자리를 내주었거나 배포 조건이 바뀐 프로젝트 10개를 공식 발표문과 Apache Attic 기록만 근거로 정리합니다. Redis와 Elasticsearch, MongoDB의 라이선스 변경과 그로 인해 생긴 Valkey, OpenSearch 포크를 사실만으로 다루고, Kafka에서 ZooKeeper가 빠진 과정, Apache Attic으로 이관된 Sqoop과 Oozie, Giraph, Tajo, 회사 종료 후 리눅스 재단으로 간 RethinkDB, 상표 문제로 이름을 바꾼 PrestoSQL과 Trino를 살펴봅니다. 각 항목은 무엇이었나, 왜 그때 옳았나, 무엇이 바뀌었나, 무엇이 그 자리에 왔나, 무엇을 남겼나, 지금도 쓰는 게 맞는 경우로 나눠 정리했습니다. 상태 정보는 2026년 8월 12일에 원문에서 직접 확인했습니다. Wed, 12 Aug 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) open-sourcedatabasekafkarediselasticsearchlicenseapachedeprecation