DBMS > Cassandra vs. Kdb
System Properties Comparison Cassandra vs. Kdb
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|Editorial information provided by DB-Engines|
|Name||Cassandra Xexclude from comparison||Kdb Xexclude from comparison|
|Description||Wide-column store based on ideas of BigTable and DynamoDB Optimized for write access||High performance Time Series DBMS|
|Primary database model||Wide column store||Time Series DBMS|
|Secondary database models||Vector DBMS starting with release V5||Relational DBMS|
|Developer||Apache Software Foundation Apache top level project, originally developped by Facebook||Kx Systems, a division of First Derivatives plc|
|Initial release||2008||2000 kdb was released 2000, kdb+ in 2003|
|Current release||4.1.3, July 2023||3.6, May 2018|
|License Commercial or Open Source||Open Source Apache version 2||commercial free 32-bit version|
|Cloud-based only Only available as a cloud service||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Astra DB: Multi-cloud DBaaS built on Apache Cassandra.|
|Server operating systems||BSD|
|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|
|Secondary indexes||restricted only equality queries, not always the best performing solution||yes table attribute 'grouped'|
|SQL Support of SQL||SQL-like SELECT, DML and DDL statements (CQL)||SQL-like query language (q)|
|APIs and other access methods||Proprietary protocol CQL (Cassandra Query Language, an SQL-like language)|
|Supported programming languages||C#|
|Server-side scripts Stored procedures||no||user defined functions|
|Triggers||yes||yes with views|
|Partitioning methods Methods for storing different data on different nodes||Sharding no "single point of failure"||horizontal partitioning|
|Replication methods Methods for redundantly storing data on multiple nodes||selectable replication factor Representation of geographical distribution of servers is possible||Source-replica replication|
|MapReduce Offers an API for user-defined Map/Reduce methods||yes||no similar paradigm used for internal processing|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency|
Immediate Consistency can be individually decided for each write operation
|Foreign keys Referential integrity||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|
|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.||no||yes|
|User concepts Access control||Access rights for users can be defined per object||rights management via user accounts|
|More information provided by the system vendor|
|Specific characteristics||Apache Cassandra is the leading NoSQL, distributed database management system, well...|
|Integrated columnar database & programming system for streaming, real time and historical...|
|Competitive advantages||No single point of failure ensures 100% availability . Operational simplicity for...|
|provides seamless scalability; runs on industry standard server platforms; is top-ranked...|
|Typical application scenarios||Internet of Things (IOT), fraud detection applications, recommendation engines, product...|
|tick database streaming sensor data massive intelligence applications oil and gas...|
|Key customers||Apple, Netflix, Uber, ING,, Intuit,Fidelity, NY Times, Outbrain, BazaarVoice, Best...|
|Goldman Sachs Morgan Stanley Merrill Lynch J.P. Morgan Deutsche Bank IEX Securities...|
|Market metrics||Cassandra is used by 40% of the Fortune 100.|
|kdb+ performance and reliability proven by our customers in critical infrastructure...|
|Licensing and pricing models||Apache licenseÂ Pricing for commercial distributions provided by DataStax and available...|
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|Related products and services|
|3rd parties||Cassandra Forward event: Want to level up your Cassandra game? Watch now replays of the March 2023 sessions.|
CData: Connect to Big Data & NoSQL through standard Drivers.
We invite representatives of vendors of related products to contact us for presenting information about their offerings here.
|DB-Engines blog posts|
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|Conferences, events and webinars|
Cassandra Summit 2023
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