DBMS > EJDB vs. Firebase Realtime Database
System Properties Comparison EJDB vs. Firebase Realtime Database
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|Editorial information provided by DB-Engines|
|Name||EJDB Xexclude from comparison||Firebase Realtime Database Xexclude from comparison|
|Primary database model||Document store||Document store|
|Developer||Softmotions||Google acquired by Google 2014|
|License Commercial or Open Source||Open Source GPLv2||commercial|
|Cloud-based only Only available as a cloud service||no||yes|
|DBaaS offerings (sponsored links) Database as a Service|
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|Server operating systems||server-less||hosted|
|Typing predefined data types such as float or date||yes string, integer, double, bool, date, object_id||yes|
|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.||no|
|SQL Support of SQL||no||no|
|APIs and other access methods||in-process shared library||Android|
RESTful HTTP API
|Supported programming languages||Actionscript|
|Server-side scripts Stored procedures||no||limited functionality with using 'rules'|
|Triggers||no||Callbacks are triggered when data changes|
|Partitioning methods Methods for storing different data on different nodes||none|
|Replication methods Methods for redundantly storing data on multiple nodes||none|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency if the client is offline|
Immediate Consistency if the client is online
|Foreign keys Referential integrity||no typically not needed, however similar functionality with collection joins possible||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||yes|
|Concurrency Support for concurrent manipulation of data||yes Read/Write Locking||yes|
|Durability Support for making data persistent||yes||yes|
|User concepts Access control||no||yes, based on authentication and database rules|
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|EJDB||Firebase Realtime Database|
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