DBMS > Cassandra vs. Postgres-XL vs. Qdrant
System Properties Comparison Cassandra vs. Postgres-XL vs. Qdrant
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|Editorial information provided by DB-Engines
|Cassandra Xexclude from comparison
|Postgres-XL Xexclude from comparison
|Qdrant Xexclude from comparison
|Wide-column store based on ideas of BigTable and DynamoDB Optimized for write access
|Based on PostgreSQL enhanced with MPP and write-scale-out cluster features
|A high-performance vector database with neural network or semantic-based matching
|Primary database model
|Wide column store
|Secondary database models
|Vector DBMS starting with release V5
|Apache Software Foundation Apache top level project, originally developped by Facebook
|2014 since 2012, originally named StormDB
|4.1.3, July 2023
|10 R1, October 2018
|License Commercial or Open Source
|Open Source Apache version 2
|Open Source Mozilla public license
|Open Source Apache Version 2.0
|Cloud-based only Only available as a cloud service
|DBaaS offerings (sponsored links) Database as a Service
Providers of DBaaS offerings, please contact us to be listed.
|Astra DB: Multi-cloud DBaaS built on Apache Cassandra.
|Server operating systems
|Typing predefined data types such as float or date
|Numbers, Strings, Geo, 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.
|yes XML type, but no XML query functionality
|restricted only equality queries, not always the best performing solution
|yes Keywords, numberic ranges, geo, full-text
|SQL Support of SQL
|SQL-like SELECT, DML and DDL statements (CQL)
|yes distributed, parallel query execution
|APIs and other access methods
|Proprietary protocol CQL (Cassandra Query Language, an SQL-like language)
native C library
streaming API for large objects
RESTful HTTP/JSON API OpenAPI 3.0
|Supported programming languages
|Server-side scripts Stored procedures
|user defined functions
|Partitioning methods Methods for storing different data on different nodes
|Sharding no "single point of failure"
|Replication methods Methods for redundantly storing data on multiple nodes
|selectable replication factor Representation of geographical distribution of servers is possible
|MapReduce Offers an API for user-defined Map/Reduce methods
|Consistency concepts Methods to ensure consistency in a distributed system
Immediate Consistency can be individually decided for each write operation
|Eventual Consistency, tunable consistency
|Foreign keys Referential integrity
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data
|no Atomicity and isolation are supported for single operations
|Concurrency Support for concurrent manipulation of data
|Durability Support for making data persistent
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.
|User concepts Access control
|Access rights for users can be defined per object
|fine grained access rights according to SQL-standard
|More information provided by the system vendor
|Apache Cassandra is the leading NoSQL, distributed database management system, well...
|No single point of failure ensures 100% availability . Operational simplicity for...
|Typical application scenarios
|Internet of Things (IOT), fraud detection applications, recommendation engines, product...
|Apple, Netflix, Uber, ING,, Intuit,Fidelity, NY Times, Outbrain, BazaarVoice, Best...
|Cassandra is used by 40% of the Fortune 100.
|Licensing and pricing models
|Apache licenseÂ Pricing for commercial distributions provided by DataStax and available...
Introducing Mission Control: Less Data Ops, More DevOps
Astra DB’s Third “Serverless-versary”
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|Related products and services
|CData: Connect to Big Data & NoSQL through standard Drivers.
Cassandra Forward event: Want to level up your Cassandra game? Watch now replays of the March 2023 sessions.
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|DB-Engines blog posts
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|Recent citations in the news
What Is Cassandra? Working, Features, and Uses
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Microsoft extends life support for aging Apache Cassandra 3.11 database
Apache Cassandra: The Database that Helps Uber and Apple De-risk Their AI Projects
Vector Search Is Coming to Apache Cassandra
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Open source vector database startup Qdrant raises $28M
Qdrant Vector Database Announces Availability on Microsoft Azure to Power Enterprise AI Applications
Open-source vector database Qdrant raises $28M
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