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DBMS > etcd vs. OpenQM vs. SpaceTime vs. UniData,UniVerse

System Properties Comparison etcd vs. OpenQM vs. SpaceTime vs. UniData,UniVerse

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Editorial information provided by DB-Engines
Nameetcd  Xexclude from comparisonOpenQM infoalso called QM  Xexclude from comparisonSpaceTime  Xexclude from comparisonUniData,UniVerse  Xexclude from comparison
DescriptionA distributed reliable key-value storeQpenQM is a high-performance, self-tuning, multi-value DBMSSpaceTime is a spatio-temporal DBMS with a focus on performance.MultiValue database and application server with SQL mapping layer and meta database capabilities
Primary database modelKey-value storeMultivalue DBMSSpatial DBMSMultivalue DBMS
Secondary database modelsRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score7.03
Rank#54  Overall
#5  Key-value stores
Score0.34
Rank#284  Overall
#10  Multivalue DBMS
Score0.03
Rank#392  Overall
#8  Spatial DBMS
Score2.85
Rank#98  Overall
#1  Multivalue DBMS
Websiteetcd.io
github.com/­etcd-io/­etcd
www.rocketsoftware.com/­products/­rocket-multivalue-application-development-platform/­rocket-open-qmwww.mireo.com/­spacetimewww.rocketsoftware.com/­products/­rocket-multivalue-application-development-platform/­rocket-unidata
Technical documentationetcd.io/­docs
github.com/­etcd-io/­etcd/­tree/­master/­Documentation
docs.rocketsoftware.com/­bundle?cluster=true&labelkey=unidata&labelkey=prod_unidata
DeveloperRocket Software, originally Martin PhillipsMireoRocket Software
Initial release199320201985
Current release3.4, August 20193.4-12
License infoCommercial or Open SourceOpen Source infoApache Version 2.0Open Source infoGPLv2, extended commercial license availablecommercialcommercial
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageGoC++C
Server operating systemsFreeBSD
Linux
Windows infoexperimental
AIX
FreeBSD
Linux
macOS
Raspberry Pi
Solaris
Windows
LinuxAIX
HP-UX
Linux
Solaris
Windows
Data schemeschema-freeyes infowith some exceptionsyesschema-free
Typing infopredefined data types such as float or datenoyesoptional
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.noyesno
Secondary indexesnoyesnoyes
SQL infoSupport of SQLnonoA subset of ANSI SQL is implementedyes
APIs and other access methodsgRPC
JSON over HTTP
RESTful HTTP APIJava API infoJPA
JDBC
ODBC
OLE DB
Proprietary protocol
RESTful HTTP API
SOAP-based API
Supported programming languages.Net
C
C++
Clojure
Erlang
Go
Haskell
Java
JavaScript (Node.js)
Perl
PHP
Python
R
Ruby
Rust
Scala
Tcl
.Net
Basic
C
Java
Objective C
PHP
Python
C#
C++
Python
.Net
Basic infoU2 Basic
C
Java
Server-side scripts infoStored proceduresnoyesnoyes
Triggersyes, watching key changesyesnoyes infoU2 Basic
Partitioning methods infoMethods for storing different data on different nodesyesFixed-grid hypercubesnone
Replication methods infoMethods for redundantly storing data on multiple nodesUsing Raft consensus algorithm to ensure data replication with strong consistency among multiple replicas.yesReal-time block device replication (DRBD)Source-replica replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnononono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynononono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACIDnoACID infoconfigurable
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentyesyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.nono
User concepts infoAccess controlnoAccess rights can be defined down to the item levelyesAccess rights according to SQL-standard and operating system based

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More resources
etcdOpenQM infoalso called QMSpaceTimeUniData,UniVerse
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