DBMS > Apache Phoenix vs. Citus
System Properties Comparison Apache Phoenix vs. Citus
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|Editorial information provided by DB-Engines|
|Name||Apache Phoenix Xexclude from comparison||Citus Xexclude from comparison|
|Description||A scale-out RDBMS with evolutionary schema built on Apache HBase||Scalable hybrid operational and analytics RDBMS for big data use cases based on PostgreSQL|
|Primary database model||Relational DBMS||Relational DBMS|
|Secondary database models||Document store|
|Developer||Apache Software Foundation|
|Current release||5.0-HBase2, July 2018 and 4.15-HBase1, December 2019||8.1, December 2018|
|License Commercial or Open Source||Open Source Apache Version 2.0||Open Source AGPL, commercial license also available|
|Cloud-based only Only available as a cloud service||no||no|
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|Server operating systems||Linux|
|Data scheme||yes late-bound, schema-on-read capabilities||yes|
|Typing predefined data types such as float or date||yes||yes|
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.||no||yes specific XML type available, but no XML query functionality|
|SQL Support of SQL||yes||yes standard, with numerous extensions|
|APIs and other access methods||JDBC||ADO.NET|
native C library
streaming API for large objects
|Supported programming languages||C|
|Server-side scripts Stored procedures||user defined functions||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.|
|Partitioning methods Methods for storing different data on different nodes||Sharding||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||Multi-source replication|
|Source-replica replication other methods possible by using 3rd party extensions|
|MapReduce Offers an API for user-defined Map/Reduce methods||Hadoop integration||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency or Eventual Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes|
|Durability Support for making data persistent||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes||no|
|User concepts Access control||Access Control Lists (using HBase ACL) for RBAC, integration with Apache Ranger for RBAC & ABAC, multi-tenancy||fine grained access rights according to SQL-standard|
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