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DBMS > Apache Cassandra vs. FatDB vs. Qdrant

System Properties Comparison Apache Cassandra vs. FatDB vs. Qdrant

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Editorial information provided by DB-Engines
NameApache Cassandra  Xexclude from comparisonFatDB  Xexclude from comparisonQdrant  Xexclude from comparison
FatDB/FatCloud has ceased operations as a company with February 2014. FatDB is discontinued and excluded from the ranking.
DescriptionWide-column store based on ideas of BigTable and DynamoDB infoOptimized for write accessA .NET NoSQL DBMS that can integrate with and extend SQL Server.A high-performance vector database with neural network or semantic-based matching
Primary database modelWide column storeDocument store
Key-value store
Vector DBMS
Secondary database modelsVector DBMS infostarting with release V5
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score106.65
Rank#11  Overall
#1  Wide column stores
Score2.03
Rank#112  Overall
#8  Vector DBMS
Websitecassandra.apache.orggithub.com/­qdrant/­qdrant
qdrant.tech
Technical documentationcassandra.apache.org/­doc/­latestqdrant.tech/­documentation
DeveloperApache Software Foundation infoApache top level project, originally developped by FacebookFatCloudQdrant
Initial release200820122021
Current release5.0-rc1, July 2024
License infoCommercial or Open SourceOpen Source infoApache version 2commercialOpen Source infoApache Version 2.0
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJavaC#Rust
Server operating systemsBSD
Linux
OS X
Windows
WindowsDocker
Linux
macOS
Windows
Data schemeschema-freeschema-freeschema-free
Typing infopredefined data types such as float or dateyesyesNumbers, Strings, Geo, Boolean
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.nono
Secondary indexesrestricted infoonly equality queries, not always the best performing solutionyesyes infoKeywords, numberic ranges, geo, full-text
SQL infoSupport of SQLSQL-like SELECT, DML and DDL statements (CQL)no infoVia inetgration in SQL Serverno
APIs and other access methodsProprietary protocol infoCQL (Cassandra Query Language, an SQL-like language)
Thrift
.NET Client API
LINQ
RESTful HTTP API
RPC
Windows WCF Bindings
gRPC
OpenAPI 3.0
RESTful HTTP/JSON API infoOpenAPI 3.0
Supported programming languagesC#
C++
Clojure
Erlang
Go
Haskell
Java
JavaScript infoNode.js
Perl
PHP
Python
Ruby
Scala
C#.Net
Go
Java
JavaScript (Node.js)
Python
Rust
Server-side scripts infoStored proceduresnoyes infovia applications
Triggersyesyes infovia applications
Partitioning methods infoMethods for storing different data on different nodesSharding infono "single point of failure"ShardingSharding
Replication methods infoMethods for redundantly storing data on multiple nodesselectable replication factor infoRepresentation of geographical distribution of servers is possibleselectable replication factorCollection-level replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsyesyesno
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual Consistency
Immediate Consistency infocan be individually decided for each write operation
Eventual Consistency
Immediate Consistency
Eventual Consistency, tunable consistency
Foreign keys infoReferential integritynono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datano infoAtomicity and isolation are supported for single operationsno
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes
User concepts infoAccess controlAccess rights for users can be defined per objectno infoCan implement custom security layer via applicationsKey-based authentication
More information provided by the system vendor
Apache CassandraFatDBQdrant
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More resources
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Recent citations in the news

IBM plans to buy open source Cassandra wrangler DataStax
25 February 2025, The Register

Best practices for running Apache Cassandra with Amazon EBS
8 November 2024, AWS Blog

Facebook’s Database Handling Billions of Messages (Apache Cassandra® Deep Dive)
11 March 2025, substack.com

New Apache Cassandra 5.0 gives open source NoSQL database a scalability and performance boost
6 September 2024, VentureBeat

IBM to acquire DataStax, helping clients bring the power of unstructured data to enterprise AI applications
25 February 2025, IBM

provided by Google News

Qdrant Expands Enterprise Capabilities with New Cloud Features, Strengthening AI Workloads for Large-Scale Deployments
4 March 2025, Business Wire

Open-source vector database Qdrant expands enterprise cloud AI features
4 March 2025, SiliconANGLE News

Qdrant update adds security measures for AI development
4 March 2025, TechTarget

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23 January 2025, Blocks and Files

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