TODO

• Flink: https://flink.apache.org/

• Kafka: https://kafka.apache.org/

• Zookeeper: https://zookeeper.apache.org/

• Lucene: https://lucene.apache.org/

• Earlybird: Real-Time Search at Twitter

• ElasticSearch

Cache

• Memcache

• Redis

Ranking

• PageRank

Remove Duplicate

• MinHash

Gateway

Star Schema vs. Snowflake Schema