DBMS > InterSystems IRIS vs. PostgreSQL vs. TerarkDB
System Properties Comparison InterSystems IRIS vs. PostgreSQL vs. TerarkDB
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|Editorial information provided by DB-Engines|
|Name||InterSystems IRIS Xexclude from comparison||PostgreSQL Xexclude from comparison||TerarkDB Xexclude from comparison|
|Description||A containerised multi-model DBMS, interoperability and analytics data platform with wide capabilities for vertical and horizontal scalability||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||A key-value store forked from RocksDB with advanced compression algorithms. It can be used standalone or as a storage engine for MySQL and MongoDB|
|Primary database model||Document store|
Object oriented DBMS
|Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.||Key-value store|
|Secondary database models||Document store|
Graph DBMS with Apache Age
Vector DBMS with pgvector extension
|Developer||InterSystems||PostgreSQL Global Development Group www.postgresql.org/developer||Terark|
|Initial release||2018||1989 1989: Postgres, 1996: PostgreSQL||2016|
|Current release||2021.1, June 2021||16.1, November 2023|
|License Commercial or Open Source||commercial||Open Source BSD||commercial restricted open source version available|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Aiven for PostgreSQL: Fully managed PostgreSQL for developers with 70+ extensions and flexible orchestration tools.|
|Server operating systems||AIX|
|Data scheme||depending on used data model||yes||schema-free|
|Typing predefined data types such as float or date||yes||yes||no|
|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.||yes||yes specific XML-type available, but no XML query functionality.||no|
|SQL Support of SQL||yes||yes standard with numerous extensions||no|
|APIs and other access methods||JDBC|
RESTful HTTP API
native C library
streaming API for large objects
|Supported programming languages||.Net|
|Server-side scripts Stored procedures||yes||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.||no|
|Partitioning methods Methods for storing different data on different nodes||Sharding||partitioning by range, list and (since PostgreSQL 11) by hash||none|
|Replication methods Methods for redundantly storing data on multiple nodes||Source-replica replication||Source-replica replication other methods possible by using 3rd party extensions||none|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||yes||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||no|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes||no||yes|
|User concepts Access control||yes||fine grained access rights according to SQL-standard||no|
More information provided by the system vendor
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