DBMS > Druid vs. PostgreSQL vs. SwayDB
System Properties Comparison Druid vs. PostgreSQL vs. SwayDB
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|Editorial information provided by DB-Engines|
|Name||Druid Xexclude from comparison||PostgreSQL Xexclude from comparison||SwayDB Xexclude from comparison|
|Description||Open-source analytics data store designed for OLAP queries on timeseries data||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||An embeddable, non-blocking, type-safe key-value store for single or multiple disks and in-memory storage|
|Primary database model||Relational DBMS|
Time Series 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|
|Developer||Metamarkets Group and contributors||PostgreSQL Global Development Group www.postgresql.org/developer||Simer Plaha|
|Initial release||2012||1989 1989: Postgres, 1996: PostgreSQL||2018|
|Current release||12.1, November 2019|
|License Commercial or Open Source||Open Source Apache license v2||Open Source BSD||Open Source GNU Affero GPL V3.0|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Server operating systems||Linux|
|Data scheme||yes schema-less columns are supported||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.||no||yes specific XML-type available, but no XML query functionality.||no|
|SQL Support of SQL||SQL support via Apache Calcite adapter||yes standard with numerous extensions||no|
|APIs and other access methods||JSON over HTTP||ADO.NET|
native C library
streaming API for large objects
|Supported programming languages||Clojure|
|Server-side scripts Stored procedures||no||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||yes, via HDFS, S3 or other storage engines||Master-slave 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||Immediate Consistency|
|Foreign keys Referential integrity||no||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||ACID||Atomic execution of operations|
|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.||no||no||yes|
|User concepts Access control||no available via extensions||fine grained access rights according to SQL-standard||no|
More information provided by the system vendor
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