DBMS > Datomic vs. PostgreSQL vs. Tarantool
System Properties Comparison Datomic vs. PostgreSQL vs. Tarantool
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|Editorial information provided by DB-Engines|
|Name||Datomic Xexclude from comparison||PostgreSQL Xexclude from comparison||Tarantool Xexclude from comparison|
|Description||Datomic builds on immutable values, supports point-in-time queries and uses 3rd party systems for durability||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||In-memory computing platform with a flexible data schema for efficiently building high-performance applications|
|Primary database model||Relational 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|
Spatial DBMS with Tarantool/GIS extension
|Developer||Cognitect||PostgreSQL Global Development Group www.postgresql.org/developer||VK|
|Initial release||2012||1989 1989: Postgres, 1996: PostgreSQL||2008|
|Current release||1.0.6362, January 2022||14.5, August 2022||2.10.0, May 2022|
|License Commercial or Open Source||commercial limited edition free||Open Source BSD||Open Source BSD|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Implementation language||Java, Clojure||C||C and C++|
|Server operating systems||All OS with a Java VM||FreeBSD|
|Data scheme||yes||yes||schema-free, schema definition possible|
|Typing predefined data types such as float or date||yes||yes||string, double, decimal, uuid, integer, blob, boolean|
|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.||no|
|SQL Support of SQL||no||yes standard with numerous extensions||Full-featured ANSI SQL support|
|APIs and other access methods||RESTful HTTP API||ADO.NET|
native C library
streaming API for large objects
|Open binary protocol|
|Supported programming languages||Clojure|
|Server-side scripts Stored procedures||yes Transaction Functions||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.||Lua, C and SQL stored procedures|
|Triggers||By using transaction functions||yes||yes|
|Partitioning methods Methods for storing different data on different nodes||none But extensive use of caching in the application peers||partitioning by range, list and (since PostgreSQL 11) by hash||Hash sharding based on virtual buckets|
|Replication methods Methods for redundantly storing data on multiple nodes||none But extensive use of caching in the application peers||Source-replica replication other methods possible by using 3rd party extensions||Multi-source replication|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||yes||yes, with SQL|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||ACID, read commited|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes, cooperative multitasking|
|Durability Support for making data persistent||yes using external storage systems (e.g. Cassandra, DynamoDB, PostgreSQL, Couchbase and others)||yes||yes, regular snapshots on disk, write ahead logging|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes recommended only for testing and development||no||yes, full featured in-memory storage engine with persistence|
|User concepts Access control||no||fine grained access rights according to SQL-standard||Access rights for users and roles|
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|DB-Engines blog posts|
Snowflake is the DBMS of the Year 2021
Data processing speed and reliability: in-memory synchronous replication The Architecture of Datomic Rich Hickey on Datomic: Datalog, Databases, Persistent Data Structures Brazil’s Nubank Acquires US Software Firm Cognitect Lucas Cavalcanti on Using Clojure, Microservices, Hexagonal Architecture and Public Cloud at Nubank Architecting Software for Leverage provided by Google News Quest Software Announces Public Beta for SharePlex for PostgreSQL EnterpriseDB rides on PostgreSQL momentum in APAC Installing PostgreSQL on macOS - MUO PostgreSQL vs. MySQL: Four Key Reasons to Choose the Former Running PostgreSQL Inside Your Browser provided by Google News Tarantool: A Lua-based database engine provided by Google News Clojure and React Software Developer Senior Software Engineer (Clojure Developer) PostgreSQL DBA/Developer* Data Engineer PostgreSQL Database Administrator (Senior) PostgreSQL DB Developer PostgreSQL DBA Technical Support Engineer Senior Python Developer Senior QA Engineer (Automation) Senior Frontend Developer (React) Middle / Senior Ruby Developer
The Architecture of Datomic
Rich Hickey on Datomic: Datalog, Databases, Persistent Data Structures
Brazil’s Nubank Acquires US Software Firm Cognitect
Lucas Cavalcanti on Using Clojure, Microservices, Hexagonal Architecture and Public Cloud at Nubank
Architecting Software for Leverage
provided by Google News
Quest Software Announces Public Beta for SharePlex for PostgreSQL
EnterpriseDB rides on PostgreSQL momentum in APAC
Installing PostgreSQL on macOS - MUO
PostgreSQL vs. MySQL: Four Key Reasons to Choose the Former
Running PostgreSQL Inside Your Browser
provided by Google News
Tarantool: A Lua-based database engine
provided by Google News
Clojure and React Software Developer
Senior Software Engineer (Clojure Developer)
PostgreSQL Database Administrator (Senior)
PostgreSQL DB Developer
Technical Support Engineer
Senior Python Developer
Senior QA Engineer (Automation)
Senior Frontend Developer (React)
Middle / Senior Ruby Developer
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