DBMS > Amazon CloudSearch vs. Datomic vs. HyperSQL
System Properties Comparison Amazon CloudSearch vs. Datomic vs. HyperSQL
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|Editorial information provided by DB-Engines|
|Name||Amazon CloudSearch Xexclude from comparison||Datomic Xexclude from comparison||HyperSQL also known as HSQLDB Xexclude from comparison|
|Description||A hosted search engine service by Amazon with the data stored in Amazons cloud||Datomic builds on immutable values, supports point-in-time queries and uses 3rd party systems for durability||Multithreaded, transactional RDBMS written in Java also known as HSQLDB|
|Primary database model||Search engine||Relational DBMS||Relational DBMS|
|Current release||1.0.6362, January 2022||2.7.1, October 2022|
|License Commercial or Open Source||commercial||commercial limited edition free||Open Source based on BSD license|
|Cloud-based only Only available as a cloud service||yes||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Implementation language||Java, Clojure||Java|
|Server operating systems||hosted||All OS with a Java VM||All OS with a Java VM Embedded (into Java applications) and Client-Server operating modes|
|Typing predefined data types such as float or date||yes||yes||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||no|
|Secondary indexes||yes all search fields are automatically indexed||yes||yes|
|SQL Support of SQL||no||no||yes|
|APIs and other access methods||HTTP API||RESTful HTTP API||HTTP API JDBC via HTTP|
|Supported programming languages||Clojure|
|All languages supporting JDBC/ODBC|
|Server-side scripts Stored procedures||no||yes Transaction Functions||Java, SQL|
|Triggers||no||By using transaction functions||yes|
|Partitioning methods Methods for storing different data on different nodes||yes automatic partitioning across Amazon Search Instance as required||none But extensive use of caching in the application peers||none|
|Replication methods Methods for redundantly storing data on multiple nodes||yes managed transparently by AWS||none But extensive use of caching in the application peers||none|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes using external storage systems (e.g. Cassandra, DynamoDB, PostgreSQL, Couchbase and others)||yes|
|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||yes|
|User concepts Access control||authentication via encrypted signatures||no||fine grained access rights according to SQL-standard|
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|Amazon CloudSearch||Datomic||HyperSQL also known as HSQLDB|
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