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DBMS > FoundationDB vs. OpenMLDB vs. Oracle Coherence vs. Realm

System Properties Comparison FoundationDB vs. OpenMLDB vs. Oracle Coherence vs. Realm

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Editorial information provided by DB-Engines
NameFoundationDB  Xexclude from comparisonOpenMLDB  Xexclude from comparisonOracle Coherence  Xexclude from comparisonRealm  Xexclude from comparison
Created as commercial project in 2013, FoundationDB has been acquired by Apple in March 2015 and was withdrawn from the market. As a consequence, the product was removed from the DB-Engines ranking. In April 2018, Apple open-sourced FoundationDB and it therefore reappears in the ranking.
DescriptionOrdered key-value store. Core features are complimented by layers.An open-source machine learning database that provides a feature platform for training and inferenceOracles in-memory data grid solutionA DBMS built for use on mobile devices that’s a fast, easy to use alternative to SQLite and Core Data
Primary database modelDocument store infosupported via specific layer
Key-value store
Relational DBMS infosupported via specific SQL-layer
Time Series DBMSKey-value storeDocument store
Secondary database modelsRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score1.03
Rank#190  Overall
#31  Document stores
#28  Key-value stores
#89  Relational DBMS
Score0.02
Rank#367  Overall
#37  Time Series DBMS
Score1.92
Rank#130  Overall
#22  Key-value stores
Score7.60
Rank#52  Overall
#9  Document stores
Websitegithub.com/­apple/­foundationdbopenmldb.aiwww.oracle.com/­java/­coherencerealm.io
Technical documentationapple.github.io/­foundationdbopenmldb.ai/­docs/­zh/­maindocs.oracle.com/­en/­middleware/­standalone/­coherencerealm.io/­docs
DeveloperFoundationDB4 Paradigm Inc.OracleRealm, acquired by MongoDB in May 2019
Initial release2013202020072014
Current release6.2.28, November 20202024-2 February 202414.1, August 2023
License infoCommercial or Open SourceOpen Source infoApache 2.0Open SourcecommercialOpen Source
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageC++C++, Java, ScalaJava
Server operating systemsLinux
OS X
Windows
LinuxAll OS with a Java VMAndroid
Backend: server-less
iOS
Windows
Data schemeschema-free infosome layers support schemasFixed schemaschema-freeyes
Typing infopredefined data types such as float or dateno infosome layers support typingyesyesyes
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.nonono
Secondary indexesnoyesnoyes
SQL infoSupport of SQLsupported in specific SQL layer onlyyesnono
APIs and other access methodsJDBC
SQLAlchemy
JCache
JPA
RESTful HTTP API
Supported programming languages.Net
C
C++
Go
Java
JavaScript infoNode.js
PHP
Python
Ruby
Swift
C++
Go
Java
Python
Scala
.Net
C++
Java
.Net
Java infowith Android only
Objective-C
React Native
Swift
Server-side scripts infoStored proceduresin SQL-layer onlynonono inforuns within the applications so server-side scripts are unnecessary
Triggersnonoyes infoLive Eventsyes infoChange Listeners
Partitioning methods infoMethods for storing different data on different nodesShardinghorizontal partitioningShardingnone
Replication methods infoMethods for redundantly storing data on multiple nodesyesSource-replica replicationyes, with selectable consistency levelnone
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemLinearizable consistencyImmediate ConsistencyEventual Consistency
Immediate Consistency
Immediate Consistency
Foreign keys infoReferential integrityin SQL-layer onlynonono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDnoconfigurableACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyes infooptionallyyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesyes infoIn-Memory realm
User concepts infoAccess controlnofine grained access rights according to SQL-standardauthentification to access the cache via certificates or http basic authenticationyes

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FoundationDBOpenMLDBOracle CoherenceRealm
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