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DBMS > Amazon DynamoDB vs. DataFS vs. Datomic

System Properties Comparison Amazon DynamoDB vs. DataFS vs. Datomic

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Editorial information provided by DB-Engines
NameAmazon DynamoDB  Xexclude from comparisonDataFS  Xexclude from comparisonDatomic  Xexclude from comparison
DescriptionHosted, scalable database service by Amazon with the data stored in Amazons cloudAll data is stored inside objects which are linked by so-called link attributes. Objects consist of classes which can be extended and de-extended at runtime. Graphs can be defined with a struct.Datomic builds on immutable values, supports point-in-time queries and uses 3rd party systems for durability
Primary database modelDocument store
Key-value store
Object oriented DBMSRelational DBMS
Secondary database modelsGraph DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score76.49
Rank#15  Overall
#3  Document stores
#2  Key-value stores
Score0.00
Rank#382  Overall
#20  Object oriented DBMS
Score1.48
Rank#143  Overall
#65  Relational DBMS
Websiteaws.amazon.com/­dynamodbnewdatabase.comwww.datomic.com
Technical documentationdocs.aws.amazon.com/­dynamodbdev.mobiland.com/­Overview.xspdocs.datomic.com
DeveloperAmazonMobiland AGCognitect
Initial release201220182012
Current release1.1.263, October 20221.0.7180, July 2024
License infoCommercial or Open Sourcecommercial infofree tier for a limited amount of database operationscommercialcommercial infolimited edition free
Cloud-based only infoOnly available as a cloud serviceyesnono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJava, Clojure
Server operating systemshostedWindowsAll OS with a Java VM
Data schemeschema-freeClasses, Structs, and Lists are written in proprietary DataTypeDefinitionLanguage (.dtdl) and Objects consisting of those are written in proprietary DataAccessDefinitionLanguage (.dadl)yes
Typing infopredefined data types such as float or dateyesyesyes
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 indexesyesnoyes
SQL infoSupport of SQLnonono
APIs and other access methodsRESTful HTTP API.NET Client API
Proprietary client DLL
WinRT client
RESTful HTTP API
Supported programming languages.Net
ColdFusion
Erlang
Groovy
Java
JavaScript
Perl
PHP
Python
Ruby
.Net
C
C#
C++
VB.Net
Clojure
Java
Server-side scripts infoStored proceduresnoyes infoTransaction Functions
Triggersyes infoby integration with AWS Lambdano, except callback-events from server when changes happenedBy using transaction functions
Partitioning methods infoMethods for storing different data on different nodesShardingProprietary Sharding systemnone infoBut extensive use of caching in the application peers
Replication methods infoMethods for redundantly storing data on multiple nodesyesnone infoBut extensive use of caching in the application peers
MapReduce infoOffers an API for user-defined Map/Reduce methodsno infomay be implemented via Amazon Elastic MapReduce (Amazon EMR)nono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual Consistency
Immediate Consistency infocan be specified for read operations
Immediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACID infoACID across one or more tables within a single AWS account and regionACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyes infousing external storage systems (e.g. Cassandra, DynamoDB, PostgreSQL, Couchbase and others)
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes inforecommended only for testing and development
User concepts infoAccess controlAccess rights for users and roles can be defined via the AWS Identity and Access Management (IAM)Windows-Profileno

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More resources
Amazon DynamoDBDataFSDatomic
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Recent citations in the news

Announcing configurable point-in-time recovery periods for Amazon DynamoDB
7 January 2025, Amazon Web Services

What version of Amazon DynamoDB are you running?
15 October 2024, Amazon Web Services

Amazon DynamoDB re:Invent 2024 recap
19 December 2024, Amazon Web Services

New Amazon DynamoDB zero-ETL integration with Amazon SageMaker Lakehouse | Amazon Web Services
3 December 2024, Amazon Web Services

Using attribute-based access control for tag-based access authorization with Amazon DynamoDB
18 November 2024, Amazon Web Services

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Brazil’s Nubank acquires US software firm Cognitect, creator of Clojure and Datomic
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Rich Hickey on Datomic, CAP and ACID
21 January 2013, infoq.com

Nubank acquires US company; PayPal studies cryptocurrencies
24 July 2020, iupana

Zoona Case Study
16 December 2017, Amazon Web Services

Stanchion Turns SQLite Into A Column Store
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