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DBMS > Blueflood vs. Cassandra vs. Couchbase vs. Realm vs. ScyllaDB

System Properties Comparison Blueflood vs. Cassandra vs. Couchbase vs. Realm vs. ScyllaDB

Editorial information provided by DB-Engines
NameBlueflood  Xexclude from comparisonCassandra  Xexclude from comparisonCouchbase infoOriginally called Membase  Xexclude from comparisonRealm  Xexclude from comparisonScyllaDB  Xexclude from comparison
DescriptionScalable TimeSeries DBMS based on CassandraWide-column store based on ideas of BigTable and DynamoDB infoOptimized for write accessA distributed document store with integrated cache, a powerful search engine, in-built operational and analytical capabilities, and an embedded mobile databaseA DBMS built for use on mobile devices that’s a fast, easy to use alternative to SQLite and Core DataCassandra and DynamoDB compatible wide column store
Primary database modelTime Series DBMSWide column storeDocument storeDocument storeWide column store
Secondary database modelsVector DBMS infostarting with release V5Key-value store infooriginating from the former Membase product and supporting the Memcached protocol
Spatial DBMS infousing the Geocouch extension
Search engine
Time Series DBMS
Vector DBMS
Key-value store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.13
Rank#346  Overall
#33  Time Series DBMS
Score98.83
Rank#12  Overall
#1  Wide column stores
Score16.59
Rank#36  Overall
#5  Document stores
Score7.41
Rank#52  Overall
#8  Document stores
Score4.08
Rank#76  Overall
#5  Wide column stores
Websiteblueflood.iocassandra.apache.orgwww.couchbase.comrealm.iowww.scylladb.com
Technical documentationgithub.com/­rax-maas/­blueflood/­wikicassandra.apache.org/­doc/­latestdocs.couchbase.comrealm.io/­docsdocs.scylladb.com
DeveloperRackspaceApache Software Foundation infoApache top level project, originally developped by FacebookCouchbase, Inc.Realm, acquired by MongoDB in May 2019ScyllaDB
Initial release20132008201120142015
Current release4.1.3, July 2023Server: 7.2, June 2023; Mobile: 3.1, March 2022; Couchbase Capella (DBaaS), June 2023ScyllaDB Open Source 5.4.1, January 2024
License infoCommercial or Open SourceOpen Source infoApache 2.0Open Source infoApache version 2Open Source infoBusiness Source License (BSL 1.1); Commercial licenses also availableOpen SourceOpen Source infoOpen Source (AGPL), commercial license available
Cloud-based only infoOnly available as a cloud servicenonononono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Astra DB: Multi-cloud DBaaS built on Apache Cassandra.Scylla Cloud: Create real-time applications that run at global scale with Scylla Cloud, the industry’s most powerful NoSQL DBaaS
Implementation languageJavaJavaC, C++, Go and ErlangC++
Server operating systemsLinux
OS X
BSD
Linux
OS X
Windows
Linux
OS X
Windows
Android
Backend: server-less
iOS
Windows
Linux
Data schemepredefined schemeschema-freeschema-freeyesschema-free
Typing infopredefined data types such as float or dateyesyesyesyesyes
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.nononono
Secondary indexesnorestricted infoonly equality queries, not always the best performing solutionyesyesyes infocluster global secondary indices
SQL infoSupport of SQLnoSQL-like SELECT, DML and DDL statements (CQL)SQL++, extends ANSI SQL to JSON for operational, transactional, and analytic use casesnoSQL-like DML and DDL statements (CQL)
APIs and other access methodsHTTP RESTProprietary protocol infoCQL (Cassandra Query Language, an SQL-like language)
Thrift
CLI Client
HTTP REST
Kafka Connector
Native language bindings for CRUD, Query, Search and Analytics APIs
Spark Connector
Spring Data
Proprietary protocol (CQL) infocompatible with CQL (Cassandra Query Language, an SQL-like language)
RESTful HTTP API (DynamoDB compatible)
Thrift
Supported programming languagesC#
C++
Clojure
Erlang
Go
Haskell
Java
JavaScript infoNode.js
Perl
PHP
Python
Ruby
Scala
.Net
C
Go
Java
JavaScript infoNode.js
Kotlin
PHP
Python
Ruby
Scala
.Net
Java infowith Android only
Objective-C
React Native
Swift
For CQL interface: C#, C++, Clojure, Erlang, Go, Haskell, Java, JavaScript, Node.js, Perl, PHP, Python, Ruby, Rust, Scala
For DynamoDB interface: .Net, ColdFusion, Erlang, Groovy, Java, JavaScript, Perl, PHP, Python, Ruby
Server-side scripts infoStored proceduresnonoFunctions and timers in JavaScript and UDFs in Java, Python, SQL++no inforuns within the applications so server-side scripts are unnecessaryyes, Lua
Triggersnoyesyes infovia the TAP protocolyes infoChange Listenersno
Partitioning methods infoMethods for storing different data on different nodesSharding infobased on CassandraSharding infono "single point of failure"Automatic ShardingnoneSharding
Replication methods infoMethods for redundantly storing data on multiple nodesselectable replication factor infobased on Cassandraselectable replication factor infoRepresentation of geographical distribution of servers is possibleMulti-source replication infoincluding cross data center replication
Source-replica replication
noneselectable replication factor infoRepresentation of geographical distribution of servers is possible
MapReduce infoOffers an API for user-defined Map/Reduce methodsnoyesyesnono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual Consistency infobased on Cassandra
Immediate Consistency infobased on Cassandra
Eventual Consistency
Immediate Consistency infocan be individually decided for each write operation
Eventual Consistency
Immediate Consistency infoselectable on a per-operation basis
Immediate ConsistencyEventual Consistency
Tunable Consistency infocan be individually decided for each write operation
Foreign keys infoReferential integritynonononono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanono infoAtomicity and isolation are supported for single operationsACIDACIDno infoAtomicity and isolation are supported for single operations
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentyesyesyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.nonoyes infoEphemeral bucketsyes infoIn-Memory realmyes infoin-memory tables
User concepts infoAccess controlnoAccess rights for users can be defined per objectUser and Administrator separation with password-based and LDAP integrated Authentication. Role-base access control.yesAccess rights for users can be defined per object
More information provided by the system vendor
BluefloodCassandraCouchbase infoOriginally called MembaseRealmScyllaDB
Specific characteristicsApache Cassandra is the leading NoSQL, distributed database management system, well...
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ScyllaDB is engineered to deliver predictable performance at scale. It’s adopted...
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Competitive advantagesNo single point of failure ensures 100% availability . Operational simplicity for...
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Highly-performant (efficiently utilizes full resources of a node and network; millions...
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Typical application scenariosInternet of Things (IOT), fraud detection applications, recommendation engines, product...
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ScyllaDB is ideal for applications that require high throughput and low latency at...
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Key customersApple, Netflix, Uber, ING,, Intuit,Fidelity, NY Times, Outbrain, BazaarVoice, Best...
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Discord, Epic Games, Expedia, Zillow, Comcast, Disney+ Hotstar, Samsung, ShareChat,...
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Market metricsCassandra is used by 40% of the Fortune 100.
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ScyllaDB typically offers ~75% total cost of ownership savings, with ~5X higher throughput...
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Licensing and pricing modelsApache license  Pricing for commercial distributions provided by DataStax and available...
» more
ScyllaDB Open Source - free open source software (AGPL) ScyllaDB Enterprise - subscription-based...
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