DBMS > Cassandra vs. Hypertable vs. PostgreSQL
System Properties Comparison Cassandra vs. Hypertable vs. PostgreSQL
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|Editorial information provided by DB-Engines|
|Name||Cassandra Xexclude from comparison||Hypertable Xexclude from comparison||PostgreSQL Xexclude from comparison|
|Hypertable has stopped its further development with March 2016 and is removed from the DB-Engines ranking.|
|Description||Wide-column store based on ideas of BigTable and DynamoDB Optimized for write access||An open source BigTable implementation based on distributed file systems such as Hadoop||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL|
|Primary database model||Wide column store||Wide column store||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.|
|Secondary database models||Document store|
|Developer||Apache Software Foundation Apache top level project, originally developped by Facebook||Hypertable Inc.||PostgreSQL Global Development Group www.postgresql.org/developer|
|Initial release||2008||2009||1989 1989: Postgres, 1996: PostgreSQL|
|Current release||4.0.4, May 2022||0.9.8.11, March 2016||14.4, June 2022|
|License Commercial or Open Source||Open Source Apache version 2||Open Source GNU version 3. Commercial license available||Open Source BSD|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Server operating systems||BSD|
Windows an inofficial Windows port is available
|Typing predefined data types such as float or date||yes||no||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.|
|Secondary indexes||restricted only equality queries, not always the best performing solution||restricted only exact value or prefix value scans||yes|
|SQL Support of SQL||SQL-like SELECT, DML and DDL statements (CQL)||no||yes standard with numerous extensions|
|APIs and other access methods||Proprietary protocol CQL (Cassandra Query Language, an SQL-like language)|
native C library
streaming API for large objects
|Supported programming languages||C#|
|Server-side scripts Stored procedures||no||no||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 no "single point of failure"||Sharding||partitioning by range, list and (since PostgreSQL 11) by hash|
|Replication methods Methods for redundantly storing data on multiple nodes||selectable replication factor Representation of geographical distribution of servers is possible||selectable replication factor on file system level||Source-replica replication other methods possible by using 3rd party extensions|
|MapReduce Offers an API for user-defined Map/Reduce methods||yes||yes||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency|
Immediate Consistency can be individually decided for each write operation
|Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no Atomicity and isolation are supported for single operations||no||ACID|
|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|
|User concepts Access control||Access rights for users can be defined per object||no||fine grained access rights according to SQL-standard|
|More information provided by the system vendor|
|Specific characteristics||Apache Cassandra is the leading NoSQL, distributed database management system, well...|
|Competitive advantages||No single point of failure ensures 100% availability . Operational simplicity for...|
|Typical application scenarios||Internet of Things (IOT), fraud detection applications, recommendation engines, product...|
|Key customers||Apple, Netflix, Uber, ING,, Intuit,Fidelity, NY Times, Outbrain, BazaarVoice, Best...|
|Market metrics||Cassandra is used by 40% of the Fortune 100.|
|Licensing and pricing models||Apache licenseÂ Pricing for commercial distributions provided by DataStax and available...|
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