DB-EnginesExtremeDB: the mission critical dbmsEnglish
Deutsch
Knowledge Base of Relational and NoSQL Database Management Systemsprovided by solid IT

DBMS > Citus vs. Coveo vs. IBM Db2 Event Store

System Properties Comparison Citus vs. Coveo vs. IBM Db2 Event Store

Please select another system to include it in the comparison.

Editorial information provided by DB-Engines
NameCitus  Xexclude from comparisonCoveo  Xexclude from comparisonIBM Db2 Event Store  Xexclude from comparison
DescriptionScalable hybrid operational and analytics RDBMS for big data use cases based on PostgreSQLAI-powered hosted search, recommendation and personalization platform providing tools for both low-code and full-code developmentDistributed Event Store optimized for Internet of Things use cases
Primary database modelRelational DBMSSearch engineEvent Store
Time Series DBMS
Secondary database modelsDocument store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score2.81
Rank#116  Overall
#59  Relational DBMS
Score2.40
Rank#128  Overall
#12  Search engines
Score0.14
Rank#370  Overall
#3  Event Stores
#37  Time Series DBMS
Websitewww.citusdata.comwww.coveo.comwww.ibm.com/­products/­db2-event-store
Technical documentationdocs.citusdata.comdocs.coveo.comwww.ibm.com/­support/­knowledgecenter/­en/­SSGNPV_2.0.0/­welcome.html
DeveloperCoveoIBM
Initial release201020122017
Current release8.1, December 20182.0
License infoCommercial or Open SourceOpen Source infoAGPL, commercial license also availablecommercialcommercial infofree developer edition available
Cloud-based only infoOnly available as a cloud servicenoyesno
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageCC and C++
Server operating systemsLinuxhostedLinux infoLinux, macOS, Windows for the developer addition
Data schemeyeshybrid - fields need to be configured prior to indexing, but relationships can be exploited at query time without pre-configurationyes
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.yes infospecific XML type available, but no XML query functionalitynono
Secondary indexesyesyesno
SQL infoSupport of SQLyes infostandard, with numerous extensionsnoyes infothrough the embedded Spark runtime
APIs and other access methodsADO.NET
JDBC
native C library
ODBC
streaming API for large objects
RESTful HTTP APIADO.NET
DB2 Connect
JDBC
ODBC
RESTful HTTP API
Supported programming languages.Net
C
C++
Delphi
Java
JavaScript (Node.js)
Perl
PHP
Python
Tcl
C#
Java
JavaScript
Python
C
C#
C++
Cobol
Delphi
Fortran
Go
Java
JavaScript (Node.js)
Perl
PHP
Python
R
Ruby
Scala
Visual Basic
Server-side scripts infoStored proceduresuser defined functions inforealized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.noyes
Triggersyesyesno
Partitioning methods infoMethods for storing different data on different nodesShardingyesSharding
Replication methods infoMethods for redundantly storing data on multiple nodesSource-replica replication infoother methods possible by using 3rd party extensionsyesActive-active shard replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyEventual Consistency
Foreign keys infoReferential integrityyesyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDyesno
Concurrency infoSupport for concurrent manipulation of datayesyesNo - written data is immutable
Durability infoSupport for making data persistentyesyesYes - Synchronous writes to local disk combined with replication and asynchronous writes in parquet format to permanent shared storage
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes
User concepts infoAccess controlfine grained access rights according to SQL-standardgranular access controls, API key management, content filtersfine grained access rights according to SQL-standard

More information provided by the system vendor

We invite representatives of system vendors to contact us for updating and extending the system information,
and for displaying vendor-provided information such as key customers, competitive advantages and market metrics.

Related products and services

We invite representatives of vendors of related products to contact us for presenting information about their offerings here.

More resources
CitusCoveoIBM Db2 Event Store
Recent citations in the news

Citus For PostgreSQL Goes Fully Open Source
4 July 2022, iProgrammer

Microsoft Announces PostgreSQL Option for Cosmos DB
12 October 2022, The New Stack

Microsoft Expands Azure PostgreSQL Moxy Through Citus Data ...
30 January 2019, Data Center Knowledge

Google Makes Postgres-Compatible AlloyDB Generally Available
14 December 2022, The New Stack

What is Azure Database for PostgreSQL Flexible Server?
24 June 2022, TechRepublic

provided by Google News

Coveo AI Search and Recommendations Platform for SAP ...
23 March 2023, Financial Post

Coveo AI Search and Recommendations Platform Earns SAP ...
23 March 2023, Destination CRM

Coveo Notes “Immaterial” Business Impact from Silicon Valley Bank ...
20 March 2023, GlobeNewswire

Coveo Announces Industry-first Relevance Generative Answering ...
16 March 2023, GlobeNewswire

Coveo Announces Next Relevance 360° Event - Beyond ...
22 February 2023, GlobeNewswire

provided by Google News

Best cloud databases of 2022
4 October 2022, IT PRO

How IBM Is Turning Db2 into an 'AI Database'
3 June 2019, Datanami

IBM Builds New Ultra-Fast Platform for Hoovering Up and Analyzing ...
31 May 2018, Data Center Knowledge

IBM Advances 'Watson Anywhere' with New Clients and Innovations ...
22 October 2019, AiThority

provided by Google News

Job opportunities

Azure Postgres Architect
CPSI, Remote

Infrastructure Senior Tech Analyst - Structured Archiving
Citi, Irving, TX

Web System Developer
Community Foundation of Northwest Indiana, Inc., Munster, IN

Associate Technical Consultant
Perficient, Inc, United States

Architect, Sitecore
TA Digital, Chicago, IL

Sitecore Developer
Xiartech, Remote

Web System Developer
Community Foundation of Northwest Indiana, Munster, IN

jobs by Indeed



Share this page

Featured Products

Redis logo

The world’s most loved real‑time data platform.
Try free

Cassandra Forward online event

Want to level up your Cassandra game?
If you missed the event or would like to re-watch a session, replays are available now. Watch now!

MariaDB logo

SkySQL, the ultimate
MariaDB cloud, is here.

Get started with SkySQL today!

Vertica logo

Vertica Accelerator. The fastest analytics and machine learning, delivered as SaaS, with automated setup, administration, and management. Free trial.

Neo4j logo

See for yourself how a graph database can make your life easier.
Use Neo4j online for free.

Present your product here