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DBMS > LMDB vs. PostGIS vs. TerminusDB vs. XTDB

System Properties Comparison LMDB vs. PostGIS vs. TerminusDB vs. XTDB

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Editorial information provided by DB-Engines
NameLMDB  Xexclude from comparisonPostGIS  Xexclude from comparisonTerminusDB infoformer name was DataChemist  Xexclude from comparisonXTDB infoformerly named Crux  Xexclude from comparison
DescriptionA high performant, light-weight, embedded key-value database librarySpatial extension of PostgreSQLScalable Graph Database platform making enterprise data available by exploiting inferred entities and relationshipsA general purpose database with bitemporal SQL and Datalog and graph queries
Primary database modelKey-value storeSpatial DBMSGraph DBMSDocument store
Secondary database modelsRelational DBMSDocument store
RDF store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score2.09
Rank#121  Overall
#20  Key-value stores
Score21.72
Rank#29  Overall
#1  Spatial DBMS
Score0.23
Rank#316  Overall
#27  Graph DBMS
Score0.18
Rank#332  Overall
#46  Document stores
Websitewww.symas.com/­symas-embedded-database-lmdbpostgis.netterminusdb.comgithub.com/­xtdb/­xtdb
www.xtdb.com
Technical documentationwww.lmdb.tech/­docpostgis.net/­documentationterminusdb.github.io/­terminusdb/­#www.xtdb.com/­docs
DeveloperSymasDataChemist Ltd.Juxt Ltd.
Initial release2011200520182019
Current release0.9.32, January 20243.4.2, February 202411.0.0, January 20231.19, September 2021
License infoCommercial or Open SourceOpen SourceOpen Source infoGPL v2.0Open Source infoGPL V3Open 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 languageCCProlog, RustClojure
Server operating systemsLinux
Unix
Windows
LinuxAll OS with a Java 8 (and higher) VM
Linux
Data schemeschema-freeyesyesschema-free
Typing infopredefined data types such as float or dateyesyesyes, 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.noyesnono
Secondary indexesnoyesyes
SQL infoSupport of SQLnoyesSQL-like query language (WOQL)limited SQL, making use of Apache Calcite
APIs and other access methodsOWL
RESTful HTTP API
WOQL (Web Object Query Language)
HTTP REST
JDBC
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
JavaScript
Python
Clojure
Java
Server-side scripts infoStored proceduresnouser defined functionsyesno
Triggersnoyesyesno
Partitioning methods infoMethods for storing different data on different nodesnoneyes infobased on PostgreSQLGraph Partitioningnone
Replication methods infoMethods for redundantly storing data on multiple nodesnoneyes infobased on PostgreSQLJournaling Streamsyes, 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 ConsistencyImmediate Consistency
Foreign keys infoReferential integritynoyesyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACIDACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentyesyesyes infoin-memory journalingyes, 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.yesno
User concepts infoAccess controlnoyes infobased on PostgreSQLRole-based access control

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More resources
LMDBPostGISTerminusDB infoformer name was DataChemistXTDB infoformerly named Crux
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