DBMS > CouchDB vs. EJDB
System Properties Comparison CouchDB vs. EJDB
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|Editorial information provided by DB-Engines
|CouchDB stands for "Cluster Of Unreliable Commodity Hardware" Xexclude from comparison
|EJDB Xexclude from comparison
|A native JSON - document store inspired by Lotus Notes, scalable from globally distributed server-clusters down to mobile phones.
|Embeddable document-store database library with JSON representation of queries (in MongoDB style)
|Primary database model
|Secondary database models
|Spatial DBMS using the Geocouch extension
|Apache Software Foundation Apache top-level project, originally developed by Damien Katz, a former Lotus Notes developer
|3.3.3, December 2023
|License Commercial or Open Source
|Open Source Apache version 2
|Open Source GPLv2
|Cloud-based only Only available as a cloud service
|DBaaS offerings (sponsored links) Database as a Service
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|Server operating systems
|Typing predefined data types such as float or date
|yes string, integer, double, bool, date, object_id
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.
|yes via views
|SQL Support of SQL
|APIs and other access methods
|RESTful HTTP/JSON API
|in-process shared library
|Supported programming languages
|Server-side scripts Stored procedures
|Partitioning methods Methods for storing different data on different nodes
|Sharding improved architecture with release 2.0
|Replication methods Methods for redundantly storing data on multiple nodes
|MapReduce Offers an API for user-defined Map/Reduce methods
|Consistency concepts Methods to ensure consistency in a distributed system
|Foreign keys Referential integrity
|no typically not needed, however similar functionality with collection joins possible
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data
|no atomic operations within a single document possible
|Concurrency Support for concurrent manipulation of data
|yes strategy: optimistic locking
|yes Read/Write Locking
|Durability Support for making data persistent
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.
|User concepts Access control
|Access rights for users can be defined per database
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|CouchDB stands for "Cluster Of Unreliable Commodity Hardware"
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