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DBMS > OpenQM vs. Oracle Rdb vs. VelocityDB

System Properties Comparison OpenQM vs. Oracle Rdb vs. VelocityDB

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Editorial information provided by DB-Engines
NameOpenQM infoalso called QM  Xexclude from comparisonOracle Rdb  Xexclude from comparisonVelocityDB  Xexclude from comparison
DescriptionQpenQM is a high-performance, self-tuning, multi-value DBMSA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database modelMultivalue DBMSRelational DBMSGraph DBMS
Object oriented DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.27
Rank#298  Overall
#10  Multivalue DBMS
Score1.08
Rank#184  Overall
#85  Relational DBMS
Score0.05
Rank#358  Overall
#36  Graph DBMS
#16  Object oriented DBMS
Websitewww.rocketsoftware.com/­products/­rocket-multivalue-application-development-platform/­rocket-open-qmwww.oracle.com/­database/­technologies/­related/­rdb.htmlvelocitydb.com
Technical documentationwww.oracle.com/­database/­technologies/­related/­rdb-doc.htmlvelocitydb.com/­UserGuide
DeveloperRocket Software, originally Martin PhillipsOracle, originally developed by Digital Equipment Corporation (DEC)VelocityDB Inc
Initial release199319842011
Current release3.4-127.4.1.1, 20217.x
License infoCommercial or Open SourceOpen Source infoGPLv2, extended commercial license availablecommercialcommercial
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageC#
Server operating systemsAIX
FreeBSD
Linux
macOS
Raspberry Pi
Solaris
Windows
HP Open VMSAny that supports .NET
Data schemeyes infowith some exceptionsFlexible Schema (defined schema, partial schema, schema free)yes
Typing infopredefined data types such as float or dateyesyes
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.yesnono
Secondary indexesyesyesyes
SQL infoSupport of SQLnoyesno
APIs and other access methods.Net
Supported programming languages.Net
Basic
C
Java
Objective C
PHP
Python
.Net
Server-side scripts infoStored proceduresyesno
TriggersyesCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesyesSharding
Replication methods infoMethods for redundantly storing data on multiple nodesyes
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDyes, on a single nodeACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes
User concepts infoAccess controlAccess rights can be defined down to the item levelBased on Windows Authentication

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More resources
OpenQM infoalso called QMOracle RdbVelocityDB
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