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DBMS > GreptimeDB vs. NCache vs. NebulaGraph vs. Oracle Rdb

System Properties Comparison GreptimeDB vs. NCache vs. NebulaGraph vs. Oracle Rdb

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Editorial information provided by DB-Engines
NameGreptimeDB  Xexclude from comparisonNCache  Xexclude from comparisonNebulaGraph  Xexclude from comparisonOracle Rdb  Xexclude from comparison
DescriptionAn open source Time Series DBMS built for increased scalability, high performance and efficiencyOpen-Source and Enterprise in-memory Key-Value StoreA distributed, linear scalable, high perfomant Graph DBMS
Primary database modelTime Series DBMSKey-value storeGraph DBMSRelational DBMS
Secondary database modelsDocument store
Search engine infoUsing distributed Lucene
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.12
Rank#351  Overall
#34  Time Series DBMS
Score0.96
Rank#195  Overall
#29  Key-value stores
Score2.23
Rank#116  Overall
#10  Graph DBMS
Score1.14
Rank#178  Overall
#80  Relational DBMS
Websitegreptime.comwww.alachisoft.com/­ncachegithub.com/­vesoft-inc/­nebula
www.nebula-graph.io
www.oracle.com/­database/­technologies/­related/­rdb.html
Technical documentationdocs.greptime.comwww.alachisoft.com/­resources/­docsdocs.nebula-graph.iowww.oracle.com/­database/­technologies/­related/­rdb-doc.html
DeveloperGreptime Inc.AlachisoftVesoft Inc.Oracle, originally developed by Digital Equipment Corporation (DEC)
Initial release2022200520191984
Current release5.3.3, April 20247.4.1.1, 2021
License infoCommercial or Open SourceOpen Source infoApache Version 2.0Open Source infoEnterprise Edition availableOpen Source infoApache Version 2.0 + Common Clause 1.0commercial
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 languageRustC#, .NET, .NET Core, JavaC++
Server operating systemsAndroid
Docker
FreeBSD
Linux
macOS
Windows
Linux
Windows
LinuxHP Open VMS
Data schemeschema-free, schema definition possibleschema-freeStrong typed schemaFlexible Schema (defined schema, partial schema, schema free)
Typing infopredefined data types such as float or dateyespartial infoSupported data types are Lists, Queues, Hashsets, Dictionary and Counteryesyes
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 indexesyesyesyes infoNebula Graph internally uses the Key-Value store RocksDB for persistency. The vertices, edges, and their properties are stored as Key while their values are stored as Value. The primary indexes are per Key and secondary indexes are per Value.yes
SQL infoSupport of SQLyesSQL-like query syntax and LINQ for searching the cache. Cache Synchronization with SQL Server using SQL dependency.SQL-like query languageyes
APIs and other access methodsgRPC
HTTP API
JDBC
IDistributedCache
JCache
LINQ
Proprietary native API
Browser interface
console (shell)
Cypher Query Language
GO Object Graph Mapper
Java Object Graph Mapper
NGBatis infoORM framework for NebulaGraph and Spring-Boot
Proprietary native API
Python Object Graph Mapper
Query language nGQL
Supported programming languagesC++
Erlang
Go
Java
JavaScript
.Net
.Net Core
C#
Java
JavaScript (Node.js)
Python
Scala
.Net
C++
Go
Java
PHP
Python
Server-side scripts infoStored proceduresPythonno infosupport for stored procedures with SQL-Server CLRuser defined functions
Triggersyes infoNotifications
Partitioning methods infoMethods for storing different data on different nodesShardingyesSharding
Replication methods infoMethods for redundantly storing data on multiple nodesyes, with selectable consistency levelCausal Clustering using Raft protocol
MapReduce infoOffers an API for user-defined Map/Reduce methodsnoyesnono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyEventual Consistency
Immediate Consistency
Strong Eventual Consistency over WAN with Conflict Resolution using Bridge Topology
Immediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynoyes infoRelationships in graphsyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataoptimistic locking and pessimistic lockingACIDyes, on a single node
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentyesyesyes infousing RocksDByes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesno
User concepts infoAccess controlSimple rights management via user accountsAuthentication to access the cache via Active Directory/LDAP (possible roles: user, administrator)Role-based access control
More information provided by the system vendor
GreptimeDBNCacheNebulaGraphOracle Rdb
Specific characteristicsGreptimeDB is a SQL & Python-enabled timeseries database system built from scratch...
» more
NCache has been the market leader in .NET Distributed Caching since 2005 . NCache...
» more
NebulaGraph is a truly distributed, linearly scalable, lightning-fast graph database,...
» more
Competitive advantages- Inherits advantages of Rust, such as excellent performance, memory safe, resource...
» more
NCache is 100% .NET/ .NET Core based which fully supports ASP.NET Core Sessions ,...
» more
NebulaGraph boasts the world's only graph database solution that is able to host...
» more
Typical application scenariosFor IoT industries, GreptimeDB can seamless integrate with message queues and other...
» more
NCache enables industries like retail, finance, banking IoT, travel, ecommerce, healthcare...
» more
Social networking Fraud detection Knowledge graph Data warehouse management Anti...
» more
Key customersGreptime's clients span multiple sectors including IoT, connected vehicles, and energy...
» more
Bank of America, Citi, Natures Way, Charter Spectrum, Barclays, Henry Schein, GBM,...
» more
Companies from a variety of industries have implemented NebulaGraph Database in production,...
» more
Market metricsGreptimeDB has garnered global recognition by topping GitHub trends following its...
» more
Market Leader in .NET Distributed Caching since 2005.
» more
At our very early stage, NebulaGraph has already received over 10,000 stars on GitHub...
» more
Licensing and pricing modelsGreptimeDB: open source, distributed, cloud-native TSDB; supports Hybrid Time-series...
» more
NCache Open Source is free on an as-is basis without any support. NCache Enterprise...
» more
NebulaGraph is open source and free to use under Apache 2.0 license.
» more

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GreptimeDBNCacheNebulaGraphOracle Rdb
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