DBMS > EXASOL vs. FoundationDB vs. H2
System Properties Comparison EXASOL vs. FoundationDB vs. H2
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|Editorial information provided by DB-Engines|
|Name||EXASOL Xexclude from comparison||FoundationDB Xexclude from comparison||H2 Xexclude from comparison|
|Created as commercial project in 2013, FoundationDB has been acquired by Apple in March 2015 and was withdrawn from the market. As a consequence, the product was removed from the DB-Engines ranking. In April 2018, Apple open-sourced FoundationDB and it therefore reappears in the ranking.|
|Description||High-performance, in-memory, MPP database specifically designed for in-memory analytics.||Ordered key-value store. Core features are complimented by layers.||Full-featured RDBMS with a small footprint, either embedded into a Java application or used as a database server.|
|Primary database model||Relational DBMS||Document store supported via specific layer|
Relational DBMS supported via specific SQL-layer
|Secondary database models||Spatial DBMS|
|Current release||6.2.28, November 2020||2.1.214, June 2022|
|License Commercial or Open Source||commercial||Open Source Apache 2.0||Open Source dual-licence (Mozilla public license, Eclipse public license)|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Server operating systems||Linux|
|All OS with a Java VM|
|Data scheme||yes||schema-free some layers support schemas||yes|
|Typing predefined data types such as float or date||yes||no some layers support typing||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|
|SQL Support of SQL||yes||supported in specific SQL layer only||yes|
|APIs and other access methods||.Net|
|Supported programming languages||Java|
|Server-side scripts Stored procedures||user defined functions||in SQL-layer only||Java Stored Procedures and User-Defined Functions|
|Partitioning methods Methods for storing different data on different nodes||Sharding||Sharding||none|
|Replication methods Methods for redundantly storing data on multiple nodes||yes||With clustering: 2 database servers on different computers operate on identical copies of a database|
|MapReduce Offers an API for user-defined Map/Reduce methods||yes Hadoop integration||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Linearizable consistency||Immediate Consistency|
|Foreign keys Referential integrity||yes||in SQL-layer only||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes, multi-version concurrency control (MVCC)|
|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.||yes||yes|
|User concepts Access control||Access rights for users, groups and roles according to SQL-standard||no||fine grained access rights according to SQL-standard|
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