DBMS > Elasticsearch vs. OpenQM vs. RDF4J
System Properties Comparison Elasticsearch vs. OpenQM vs. RDF4J
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|Editorial information provided by DB-Engines|
|Name||Elasticsearch Xexclude from comparison||OpenQM also called QM Xexclude from comparison||RDF4J formerly known as Sesame Xexclude from comparison|
|Description||A distributed, RESTful modern search and analytics engine based on Apache Lucene Elasticsearch lets you perform and combine many types of searches such as structured, unstructured, geo, and metric||QpenQM is a high-performance, self-tuning, multi-value DBMS||RDF4J is a Java framework for processing RDF data, supporting both memory-based and a disk-based storage.|
|Primary database model||Search engine||Multivalue DBMS||RDF store|
|Secondary database models||Document store|
|Developer||Elastic||Martin Phillips||Since 2016 officially forked into an Eclipse project, former developer was Aduna Software.|
|Current release||8.6, January 2023||3.4-12|
|License Commercial or Open Source||Open Source Elastic License||Open Source GPLv2, extended commercial license available||Open Source Eclipse Distribution License (EDL), v1.0.|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Server operating systems||All OS with a Java VM||AIX|
|Data scheme||schema-free Flexible type definitions. Once a type is defined, it is persistent||yes with some exceptions||yes RDF Schemas|
|Typing predefined data types such as float or date||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||yes|
|Secondary indexes||yes All search fields are automatically indexed||yes||yes|
|SQL Support of SQL||SQL-like query language||no||no|
|APIs and other access methods||Java API|
RESTful HTTP/JSON API
RIO RDF Input/Output
SeRQL Sesame RDF Query Language
Sesame REST HTTP Protocol
|Supported programming languages||.Net|
Community Contributed Clients
|Server-side scripts Stored procedures||yes||yes||yes|
|Triggers||yes by using the 'percolation' feature||yes||yes|
|Partitioning methods Methods for storing different data on different nodes||Sharding||yes||none|
|Replication methods Methods for redundantly storing data on multiple nodes||yes||yes||none|
|MapReduce Offers an API for user-defined Map/Reduce methods||ES-Hadoop Connector||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency Synchronous doc based replication. Get by ID may show delays up to 1 sec. Configurable write consistency: one, quorum, all||Immediate Consistency|
|Foreign keys Referential integrity||no||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||ACID||ACID Isolation support depends on the API used|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes in-memory storage is supported as well|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||Memcached and Redis integration|
|User concepts Access control||Access rights can be defined down to the item level||no|
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|Elasticsearch||OpenQM also called QM||RDF4J formerly known as Sesame|
|DB-Engines blog posts|
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