DBMS > CockroachDB vs. EJDB vs. FatDB
System Properties Comparison CockroachDB vs. EJDB vs. FatDB
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|Editorial information provided by DB-Engines|
|Name||CockroachDB Xexclude from comparison||EJDB Xexclude from comparison||FatDB Xexclude from comparison|
|FatDB/FatCloud has ceased operations as a company with February 2014. FatDB is discontinued and excluded from the ranking.|
|Description||CockroachDB is a distributed database architected for modern cloud applications. It is wire compatible with PostgreSQL and backed by a Key-Value Store, which is either RocksDB or a purpose-built derivative, called Pebble.||Embeddable document-store database library with JSON representation of queries (in MongoDB style)||A .NET NoSQL DBMS that can integrate with and extend SQL Server.|
|Primary database model||Relational DBMS||Document store||Document store|
|Current release||21.1.2, June 2021|
|License Commercial or Open Source||Open Source Apache 2.0, commercial license available||Open Source GPLv2||commercial|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|CockroachDB: A cloud-native, distributed SQL database designed for speed, scale, and survival. Get started for free today with a fully-managed CockroachDB cluster -- leave operations behind and get your app to market faster.|
|Server operating systems||Linux|
|Data scheme||dynamic schema||schema-free||schema-free|
|Typing predefined data types such as float or date||yes||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||yes, wire compatible with PostgreSQL||no||no Via inetgration in SQL Server|
|APIs and other access methods||JDBC||in-process shared library||.NET Client API|
RESTful HTTP API
Windows WCF Bindings
|Supported programming languages||C#|
|Server-side scripts Stored procedures||no||no||yes via applications|
|Triggers||no||no||yes via applications|
|Partitioning methods Methods for storing different data on different nodes||horizontal partitioning (by key range) all tables are translated to an ordered KV store and then broken down into 64MB ranges, which are then used as replicas in RAFT||none||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||Multi-source replication using RAFT||none||selectable replication factor|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||yes|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Eventual Consistency|
|Foreign keys Referential integrity||yes||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||ACID||no||no|
|Concurrency Support for concurrent manipulation of data||yes||yes Read/Write Locking||yes|
|Durability Support for making data persistent||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no|
|User concepts Access control||Role-based access control||no||no Can implement custom security layer via applications|
|More information provided by the system vendor|
|Specific characteristics||CockroachDB is a cloud-native, distributed SQL database architected for modern applications....|
|Competitive advantages||- EFFORTLESS SCALE: Scale your applications, not operational complexity. CockroachDB...|
|Typical application scenarios||System of record (financial ledger, inventory management, transaction record), identity...|
|Key customers||Comcast, DoorDash, Mythical Games, Norfolk Southern, LUSH, Bose, Shipt, Bitski, Five9,...|
|Market metrics||8K+ long-running clusters 25K+ CockroachDB self-hosted clusters 75K+ CockroachDB...|
|Licensing and pricing models||- Apache 2.0 for core features released up to and including the 19.1 release - Time-limited...|
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