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DBMS > chDB vs. CouchDB vs. Oracle Coherence

System Properties Comparison chDB vs. CouchDB vs. Oracle Coherence

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Editorial information provided by DB-Engines
NamechDB  Xexclude from comparisonCouchDB infostands for "Cluster Of Unreliable Commodity Hardware"  Xexclude from comparisonOracle Coherence  Xexclude from comparison
DescriptionAn embedded SQL OLAP Engine powered by ClickHouseA native JSON - document store inspired by Lotus Notes, scalable from globally distributed server-clusters down to mobile phones.Oracles in-memory data grid solution
Primary database modelRelational DBMSDocument storeKey-value store
Secondary database modelsTime Series DBMSSpatial DBMS infousing the Geocouch extension
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.07
Rank#376  Overall
#158  Relational DBMS
Score8.30
Rank#47  Overall
#7  Document stores
Score1.97
Rank#129  Overall
#22  Key-value stores
Websitegithub.com/­chdb-io/­chdbcouchdb.apache.orgwww.oracle.com/­java/­coherence
Technical documentationdoc.chdb.iodocs.couchdb.org/­en/­stabledocs.oracle.com/­en/­middleware/­standalone/­coherence
DeveloperApache Software Foundation infoApache top-level project, originally developed by Damien Katz, a former Lotus Notes developerOracle
Initial release202320052007
Current release3.3.3, December 202314.1, August 2023
License infoCommercial or Open SourceOpen Source infoApache Version 2.0Open Source infoApache version 2commercial
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageErlangJava
Server operating systemsserver-lessAndroid
BSD
Linux
OS X
Solaris
Windows
All OS with a Java VM
Data schemeschema-freeschema-free
Typing infopredefined data types such as float or datenoyes
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.nono
Secondary indexesyes infovia viewsno
SQL infoSupport of SQLClose to ANSI SQL (SQL/JSON + extensions)nono
APIs and other access methodsRESTful HTTP/JSON APIJCache
JPA
RESTful HTTP API
Supported programming languagesBun
C
C++
Go
JavaScript (Node.js)
Python
Rust
C
C#
ColdFusion
Erlang
Haskell
Java
JavaScript
Lisp
Lua
Objective-C
OCaml
Perl
PHP
PL/SQL
Python
Ruby
Smalltalk
.Net
C++
Java
Server-side scripts infoStored proceduresView functions in JavaScriptno
Triggersyesyes infoLive Events
Partitioning methods infoMethods for storing different data on different nodesSharding infoimproved architecture with release 2.0Sharding
Replication methods infoMethods for redundantly storing data on multiple nodesMulti-source replication
Source-replica replication
yes, with selectable consistency level
MapReduce infoOffers an API for user-defined Map/Reduce methodsyesno
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual ConsistencyEventual Consistency
Immediate Consistency
Foreign keys infoReferential integritynono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datano infoatomic operations within a single document possibleconfigurable
Concurrency infoSupport for concurrent manipulation of datayes infostrategy: optimistic lockingyes
Durability infoSupport for making data persistentyesyes infooptionally
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes
User concepts infoAccess controlAccess rights for users can be defined per databaseauthentification to access the cache via certificates or http basic authentication

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More resources
chDBCouchDB infostands for "Cluster Of Unreliable Commodity Hardware"Oracle Coherence
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