Apache Druid

Databases: Database management, SQL, NoSQL, Wide column, PostgreSQL, MariaDB, MySQL, Derby DB, MongoDB, Cassandra, SQLite, HSQL2, H2, RocksDB, Microsoft SQL Server, DB2, Oracle Database, Memcached, Berkeley DB, Collation, SingleStore, Amazon Aurora, Graph database, Amazon DynamoDB, PrestoDB, Cache hit ratio, ACID, WAL, ARIES, DBMS, OLTP, OLAP, Database Schema, CockroachDB, Tables, Views, Apache Druid, RDMS

Apache: Apache Mesos, Apache Cassandra, Hadoop YARN, Apache CloudStack, Apache Hadoop, Apache Maven, Apache Ivy, Apache Ant, Apache Ignite, Apache Flume, Apache HTTP server, Apache Archiva, Apache Karaf, Apache Flink, Apache Beam, Apache Solr, Apache JMeter, Apache Groovy, Apache NiFi, RewriteEngine, Apache CouchDB, Apache Parquet, Apache Chainsaw, Apache Spark, Apache Lucene, MXNet