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DBMS > LevelDB vs. openGemini vs. Quasardb vs. TerminusDB

System Properties Comparison LevelDB vs. openGemini vs. Quasardb vs. TerminusDB

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Editorial information provided by DB-Engines
NameLevelDB  Xexclude from comparisonopenGemini  Xexclude from comparisonQuasardb  Xexclude from comparisonTerminusDB infoformer name was DataChemist  Xexclude from comparison
DescriptionEmbeddable fast key-value storage library that provides an ordered mapping from string keys to string valuesAn open source distributed Time Series DBMS with high concurrency, high performance, and high scalabilityDistributed, high-performance timeseries databaseScalable Graph Database platform making enterprise data available by exploiting inferred entities and relationships
Primary database modelKey-value storeTime Series DBMSTime Series DBMSGraph DBMS
Secondary database modelsDocument store
RDF store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score2.35
Rank#111  Overall
#19  Key-value stores
Score0.01
Rank#375  Overall
#39  Time Series DBMS
Score0.14
Rank#332  Overall
#29  Time Series DBMS
Score0.17
Rank#325  Overall
#29  Graph DBMS
Websitegithub.com/­google/­leveldbwww.opengemini.org
github.com/­openGemini
quasar.aiterminusdb.com
Technical documentationgithub.com/­google/­leveldb/­blob/­main/­doc/­index.mddocs.opengemini.org/­guidedoc.quasar.ai/­masterterminusdb.github.io/­terminusdb/­#
DeveloperGoogleHuawei and openGemini communityquasardbDataChemist Ltd.
Initial release2011202220092018
Current release1.23, February 20211.1, July 20233.14.1, January 202411.0.0, January 2023
License infoCommercial or Open SourceOpen Source infoBSDOpen Source infoApache Version 2.0commercial infoFree community edition, Non-profit organizations and non-commercial usage are eligible for free licensesOpen 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 languageC++GoC++Prolog, Rust
Server operating systemsIllumos
Linux
OS X
Windows
Linux
Windows
BSD
Linux
OS X
Windows
Linux
Data schemeschema-freeschema-freeschema-freeyes
Typing infopredefined data types such as float or datenoInteger, Float, Boolean, Stringyes infointeger and binaryyes
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 indexesnoyesyes infowith tags
SQL infoSupport of SQLnoSQL-like query languageSQL-like query languageSQL-like query language (WOQL)
APIs and other access methodsHTTP RESTHTTP APIOWL
RESTful HTTP API
WOQL (Web Object Query Language)
Supported programming languagesC++
Go
Java info3rd party binding
JavaScript (Node.js) info3rd party binding
Python info3rd party binding
C
C++
Go
Java
JavaScript (Node.js)
Python
Rust
.Net
C
C#
C++
Go
Java
JavaScript (Node.js)
PHP
Python
R
JavaScript
Python
Server-side scripts infoStored proceduresnononoyes
Triggersnononoyes
Partitioning methods infoMethods for storing different data on different nodesnoneShardingSharding infoconsistent hashingGraph Partitioning
Replication methods infoMethods for redundantly storing data on multiple nodesnoneyesSource-replica replication with selectable replication factorJournaling Streams
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonowith Hadoop integrationno
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynononoyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanonoACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentyes infowith automatic compression on writesyesyes infoby using LevelDByes infoin-memory journaling
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyes infoTransient mode
User concepts infoAccess controlnoAdministrators and common users accountsCryptographically strong user authentication and audit trailRole-based access control

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LevelDBopenGeminiQuasardbTerminusDB infoformer name was DataChemist
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