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DBMS > EJDB vs. LMDB vs. OpenTSDB vs. TerminusDB

System Properties Comparison EJDB vs. LMDB vs. OpenTSDB vs. TerminusDB

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Editorial information provided by DB-Engines
NameEJDB  Xexclude from comparisonLMDB  Xexclude from comparisonOpenTSDB  Xexclude from comparisonTerminusDB infoformer name was DataChemist  Xexclude from comparison
DescriptionEmbeddable document-store database library with JSON representation of queries (in MongoDB style)A high performant, light-weight, embedded key-value database libraryScalable Time Series DBMS based on HBaseScalable Graph Database platform making enterprise data available by exploiting inferred entities and relationships
Primary database modelDocument storeKey-value storeTime Series DBMSGraph DBMS
Secondary database modelsDocument store
RDF store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.31
Rank#296  Overall
#44  Document stores
Score2.09
Rank#121  Overall
#20  Key-value stores
Score1.68
Rank#142  Overall
#12  Time Series DBMS
Score0.23
Rank#316  Overall
#27  Graph DBMS
Websitegithub.com/­Softmotions/­ejdbwww.symas.com/­symas-embedded-database-lmdbopentsdb.netterminusdb.com
Technical documentationgithub.com/­Softmotions/­ejdb/­blob/­master/­README.mdwww.lmdb.tech/­docopentsdb.net/­docs/­build/­html/­index.htmlterminusdb.github.io/­terminusdb/­#
DeveloperSoftmotionsSymascurrently maintained by Yahoo and other contributorsDataChemist Ltd.
Initial release2012201120112018
Current release0.9.32, January 202411.0.0, January 2023
License infoCommercial or Open SourceOpen Source infoGPLv2Open SourceOpen Source infoLGPLOpen Source infoGPL V3
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageCCJavaProlog, Rust
Server operating systemsserver-lessLinux
Unix
Windows
Linux
Windows
Linux
Data schemeschema-freeschema-freeschema-freeyes
Typing infopredefined data types such as float or dateyes infostring, integer, double, bool, date, object_idnumeric data for metrics, strings for tagsyes
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.nonono
Secondary indexesnonono
SQL infoSupport of SQLnononoSQL-like query language (WOQL)
APIs and other access methodsin-process shared libraryHTTP API
Telnet API
OWL
RESTful HTTP API
WOQL (Web Object Query Language)
Supported programming languagesActionscript
C
C#
C++
Go
Java
JavaScript (Node.js)
Lua
Objective-C
Pike
Python
Ruby
.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
Erlang
Go
Java
Python
R
Ruby
JavaScript
Python
Server-side scripts infoStored proceduresnononoyes
Triggersnononoyes
Partitioning methods infoMethods for storing different data on different nodesnonenoneSharding infobased on HBaseGraph Partitioning
Replication methods infoMethods for redundantly storing data on multiple nodesnonenoneselectable replication factor infobased on HBaseJournaling Streams
MapReduce infoOffers an API for user-defined Map/Reduce methodsnononono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate Consistency infobased on HBase
Foreign keys infoReferential integrityno infotypically not needed, however similar functionality with collection joins possiblenonoyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACIDnoACID
Concurrency infoSupport for concurrent manipulation of datayes infoRead/Write Lockingyesyesyes
Durability infoSupport for making data persistentyesyesyesyes infoin-memory journaling
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesno
User concepts infoAccess controlnononoRole-based access control

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More resources
EJDBLMDBOpenTSDBTerminusDB infoformer name was DataChemist
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