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DBMS > OpenQM vs. Sequoiadb vs. VelocityDB vs. XTDB

System Properties Comparison OpenQM vs. Sequoiadb vs. VelocityDB vs. XTDB

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Editorial information provided by DB-Engines
NameOpenQM infoalso called QM  Xexclude from comparisonSequoiadb  Xexclude from comparisonVelocityDB  Xexclude from comparisonXTDB infoformerly named Crux  Xexclude from comparison
DescriptionQpenQM is a high-performance, self-tuning, multi-value DBMSNewSQL database with distributed OLTP and SQLA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)A general purpose database with bitemporal SQL and Datalog and graph queries
Primary database modelMultivalue DBMSDocument store
Relational DBMS
Graph DBMS
Object oriented DBMS
Document store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.34
Rank#284  Overall
#10  Multivalue DBMS
Score0.50
Rank#258  Overall
#41  Document stores
#120  Relational DBMS
Score0.11
Rank#354  Overall
#37  Graph DBMS
#16  Object oriented DBMS
Score0.18
Rank#332  Overall
#46  Document stores
Websitewww.rocketsoftware.com/­products/­rocket-multivalue-application-development-platform/­rocket-open-qmwww.sequoiadb.comvelocitydb.comgithub.com/­xtdb/­xtdb
www.xtdb.com
Technical documentationwww.sequoiadb.com/­en/­index.php?m=Files&a=indexvelocitydb.com/­UserGuidewww.xtdb.com/­docs
DeveloperRocket Software, originally Martin PhillipsSequoiadb Ltd.VelocityDB IncJuxt Ltd.
Initial release1993201320112019
Current release3.4-127.x1.19, September 2021
License infoCommercial or Open SourceOpen Source infoGPLv2, extended commercial license availableOpen Source infoServer: AGPL; Client: Apache V2commercialOpen Source infoMIT License
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageC++C#Clojure
Server operating systemsAIX
FreeBSD
Linux
macOS
Raspberry Pi
Solaris
Windows
LinuxAny that supports .NETAll OS with a Java 8 (and higher) VM
Linux
Data schemeyes infowith some exceptionsschema-freeyesschema-free
Typing infopredefined data types such as float or dateyes infooid, date, timestamp, binary, regexyesyes, extensible-data-notation format
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.yesnonono
Secondary indexesyesyesyesyes
SQL infoSupport of SQLnoSQL-like query languagenolimited SQL, making use of Apache Calcite
APIs and other access methodsproprietary protocol using JSON.NetHTTP REST
JDBC
Supported programming languages.Net
Basic
C
Java
Objective C
PHP
Python
.Net
C++
Java
PHP
Python
.NetClojure
Java
Server-side scripts infoStored proceduresyesJavaScriptnono
TriggersyesnoCallbacks are triggered when data changesno
Partitioning methods infoMethods for storing different data on different nodesyesShardingShardingnone
Replication methods infoMethods for redundantly storing data on multiple nodesyesSource-replica replicationyes, each node contains all data
MapReduce infoOffers an API for user-defined Map/Reduce methodsnononono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyEventual ConsistencyImmediate Consistency
Foreign keys infoReferential integritynononono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDDocument is locked during a transactionACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentyesyesyesyes, flexibel persistency by using storage technologies like Apache Kafka, RocksDB or LMDB
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 levelsimple password-based access controlBased on Windows Authentication

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