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DBMS > LMDB vs. OpenMLDB vs. Oracle Coherence vs. OrientDB

System Properties Comparison LMDB vs. OpenMLDB vs. Oracle Coherence vs. OrientDB

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Editorial information provided by DB-Engines
NameLMDB  Xexclude from comparisonOpenMLDB  Xexclude from comparisonOracle Coherence  Xexclude from comparisonOrientDB  Xexclude from comparison
DescriptionA high performant, light-weight, embedded key-value database libraryAn open-source machine learning database that provides a feature platform for training and inferenceOracles in-memory data grid solutionMulti-model DBMS (Document, Graph, Key/Value)
Primary database modelKey-value storeTime Series DBMSKey-value storeDocument store
Graph DBMS
Key-value store
Secondary database modelsRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score2.09
Rank#121  Overall
#20  Key-value stores
Score0.10
Rank#359  Overall
#36  Time Series DBMS
Score1.97
Rank#129  Overall
#22  Key-value stores
Score3.25
Rank#89  Overall
#16  Document stores
#6  Graph DBMS
#13  Key-value stores
Websitewww.symas.com/­symas-embedded-database-lmdbopenmldb.aiwww.oracle.com/­java/­coherenceorientdb.org
Technical documentationwww.lmdb.tech/­docopenmldb.ai/­docs/­zh/­maindocs.oracle.com/­en/­middleware/­standalone/­coherencewww.orientdb.com/­docs/­last/­index.html
DeveloperSymas4 Paradigm Inc.OracleOrientDB LTD; CallidusCloud; SAP
Initial release2011202020072010
Current release0.9.32, January 20242024-2 February 202414.1, August 20233.2.29, March 2024
License infoCommercial or Open SourceOpen SourceOpen SourcecommercialOpen Source infoApache version 2
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageCC++, Java, ScalaJavaJava
Server operating systemsLinux
Unix
Windows
LinuxAll OS with a Java VMAll OS with a Java JDK (>= JDK 6)
Data schemeschema-freeFixed schemaschema-freeschema-free infoSchema can be enforced for whole record ("schema-full") or for some fields only ("schema-hybrid")
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.nononono
Secondary indexesnoyesnoyes
SQL infoSupport of SQLnoyesnoSQL-like query language, no joins
APIs and other access methodsJDBC
SQLAlchemy
JCache
JPA
RESTful HTTP API
Tinkerpop technology stack with Blueprints, Gremlin, Pipes
Java API
RESTful HTTP/JSON API
Supported programming languages.Net
C
C++
Clojure
Go
Haskell
Java
JavaScript (Node.js)
Lisp
Lua
MatLab
Nim
Objective C
OCaml
Perl
PHP
Python
R
Ruby
Rust
Swift
Tcl
C++
Go
Java
Python
Scala
.Net
C++
Java
.Net
C
C#
C++
Clojure
Java
JavaScript
JavaScript (Node.js)
PHP
Python
Ruby
Scala
Server-side scripts infoStored proceduresnononoJava, Javascript
Triggersnonoyes infoLive EventsHooks
Partitioning methods infoMethods for storing different data on different nodesnonehorizontal partitioningShardingSharding
Replication methods infoMethods for redundantly storing data on multiple nodesnoneSource-replica replicationyes, with selectable consistency levelMulti-source replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono infocould be achieved with distributed queries
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyEventual Consistency
Immediate Consistency
Foreign keys infoReferential integritynononoyes inforelationship in graphs
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDnoconfigurableACID
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentyesyesyes infooptionallyyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesyes
User concepts infoAccess controlnofine grained access rights according to SQL-standardauthentification to access the cache via certificates or http basic authenticationAccess rights for users and roles; record level security configurable

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LMDBOpenMLDBOracle CoherenceOrientDB
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