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DBMS > IBM Db2 Event Store vs. TerminusDB vs. VelocityDB

System Properties Comparison IBM Db2 Event Store vs. TerminusDB vs. VelocityDB

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Editorial information provided by DB-Engines
NameIBM Db2 Event Store  Xexclude from comparisonTerminusDB infoformer name was DataChemist  Xexclude from comparisonVelocityDB  Xexclude from comparison
DescriptionDistributed Event Store optimized for Internet of Things use casesScalable Graph Database platform making enterprise data available by exploiting inferred entities and relationshipsA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database modelEvent Store
Time Series DBMS
Graph DBMSGraph DBMS
Object oriented DBMS
Secondary database modelsDocument store
RDF store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.23
Rank#249  Overall
#2  Event Stores
#16  Time Series DBMS
Score0.02
Rank#342  Overall
#32  Graph DBMS
Score0.07
Rank#311  Overall
#30  Graph DBMS
#16  Object oriented DBMS
Websitewww.ibm.biz/­eventstoreterminusdb.comvelocitydb.com
Technical documentationwww.ibm.com/­support/­knowledgecenter/­en/­SSGNPV_1.1.2/­eventstore/­welcome.htmlterminusdb.com/­docsvelocitydb.com/­UserGuide
DeveloperIBMDataChemist Ltd.VelocityDB Inc
Initial release201720182011
Current release1.1.31.0, 20187.x
License infoCommercial or Open Sourcecommercial infofree developer edition availableOpen Source infoGPL V3commercial
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageC++, ScalaProlog, RustC#
Server operating systemsLinux infoLinux, macOS, Windows for the developer additionLinuxAny that supports .NET
Data schemeyesyesyes
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.nonono
Secondary indexesnoyes
SQL infoSupport of SQLyes infothrough the embedded Spark runtimeSQL-like query language (WOQL)no
APIs and other access methodsRESTful HTTP API
JDBC
OWL
RESTful HTTP API
WOQL (Web Object Query Language)
.Net
Supported programming languagesJava
Python
Scala
JavaScript
Python
.Net
Server-side scripts infoStored proceduresnoyesno
TriggersnoyesCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesShardingGraph PartitioningSharding
Replication methods infoMethods for redundantly storing data on multiple nodesActive-active shard replicationJournaling Streams
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual ConsistencyImmediate Consistency
Foreign keys infoReferential integritynoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACIDACID
Concurrency infoSupport for concurrent manipulation of dataNo - written data is immutableyesyes
Durability infoSupport for making data persistentYes - Synchronous writes to local disk combined with replicationyes infoin-memory journalingyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyes
User concepts infoAccess controlUser level access controlRole-based access controlBased on Windows Authentication

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More resources
IBM Db2 Event StoreTerminusDB infoformer name was DataChemistVelocityDB
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