DBMS > Datomic
Datomic System Properties
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|Editorial information provided by DB-Engines|
|Description||Datomic builds on immutable values, supports point-in-time queries and uses 3rd party systems for durability|
|Primary database model||Relational DBMS|
|License Commercial or Open Source||commercial limited edition free|
|Cloud-based only Only available as a cloud service||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Implementation language||Java, Clojure|
|Server operating systems||All OS with a Java VM|
|Typing predefined data types such as float or date||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|
|APIs and other access methods||RESTful HTTP API|
|Supported programming languages||Clojure|
|Server-side scripts Stored procedures||yes Transaction Functions|
|Triggers||By using transaction functions|
|Partitioning methods Methods for storing different data on different nodes||none But extensive use of caching in the application peers|
|Replication methods Methods for redundantly storing data on multiple nodes||none But extensive use of caching in the application peers|
|MapReduce Offers an API for user-defined Map/Reduce methods||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency|
|Foreign keys Referential integrity||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID|
|Concurrency Support for concurrent manipulation of data||yes|
|Durability Support for making data persistent||yes using external storage systems (e.g. Cassandra, DynamoDB, PostgreSQL, Couchbase and others)|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes recommended only for testing and development|
|User concepts Access control||no|
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