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DBMS > Blueflood vs. RDF4J vs. SiteWhere vs. Snowflake vs. VelocityDB

System Properties Comparison Blueflood vs. RDF4J vs. SiteWhere vs. Snowflake vs. VelocityDB

Editorial information provided by DB-Engines
NameBlueflood  Xexclude from comparisonRDF4J infoformerly known as Sesame  Xexclude from comparisonSiteWhere  Xexclude from comparisonSnowflake  Xexclude from comparisonVelocityDB  Xexclude from comparison
DescriptionScalable TimeSeries DBMS based on CassandraRDF4J is a Java framework for processing RDF data, supporting both memory-based and a disk-based storage.M2M integration platform for persisting/querying time series dataCloud-based data warehousing service for structured and semi-structured dataA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database modelTime Series DBMSRDF storeTime Series DBMSRelational DBMSGraph DBMS
Object oriented DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.13
Rank#346  Overall
#33  Time Series DBMS
Score0.74
Rank#222  Overall
#9  RDF stores
Score0.06
Rank#383  Overall
#43  Time Series DBMS
Score130.36
Rank#8  Overall
#5  Relational DBMS
Score0.11
Rank#354  Overall
#37  Graph DBMS
#15  Object oriented DBMS
Websiteblueflood.iordf4j.orggithub.com/­sitewhere/­sitewherewww.snowflake.comvelocitydb.com
Technical documentationgithub.com/­rax-maas/­blueflood/­wikirdf4j.org/­documentationsitewhere1.sitewhere.io/­index.htmldocs.snowflake.net/­manuals/­index.htmlvelocitydb.com/­UserGuide
DeveloperRackspaceSince 2016 officially forked into an Eclipse project, former developer was Aduna Software.SiteWhereSnowflake Computing Inc.VelocityDB Inc
Initial release20132004201020142011
Current release7.x
License infoCommercial or Open SourceOpen Source infoApache 2.0Open Source infoEclipse Distribution License (EDL), v1.0.Open Source infoCommon Public Attribution License Version 1.0commercialcommercial
Cloud-based only infoOnly available as a cloud servicenononoyesno
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJavaJavaJavaC#
Server operating systemsLinux
OS X
Linux
OS X
Unix
Windows
Linux
OS X
Windows
hostedAny that supports .NET
Data schemepredefined schemeyes infoRDF Schemaspredefined schemeyes infosupport of semi-structured data formats (JSON, XML, Avro)yes
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.nonoyesno
Secondary indexesnoyesnoyes
SQL infoSupport of SQLnononoyesno
APIs and other access methodsHTTP RESTJava API
RIO infoRDF Input/Output
Sail API
SeRQL infoSesame RDF Query Language
Sesame REST HTTP Protocol
SPARQL
HTTP RESTCLI Client
JDBC
ODBC
.Net
Supported programming languagesJava
PHP
Python
JavaScript (Node.js)
Python
.Net
Server-side scripts infoStored proceduresnoyesuser defined functionsno
Triggersnoyesno infosimilar concept for controling cloud resourcesCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesSharding infobased on CassandranoneSharding infobased on HBaseyesSharding
Replication methods infoMethods for redundantly storing data on multiple nodesselectable replication factor infobased on Cassandranoneselectable replication factor infobased on HBaseyes
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonononono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual Consistency infobased on Cassandra
Immediate Consistency infobased on Cassandra
Immediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynonoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACID infoIsolation support depends on the API usednoACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyesyesyes
Durability infoSupport for making data persistentyesyes infoin-memory storage is supported as wellyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.nononoyes
User concepts infoAccess controlnonoUsers with fine-grained authorization conceptUsers with fine-grained authorization concept, user roles and pluggable authenticationBased on Windows Authentication

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More resources
BluefloodRDF4J infoformerly known as SesameSiteWhereSnowflakeVelocityDB
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