DBMS > Apache Doris vs. HarperDB vs. Hazelcast
System Properties Comparison Apache Doris vs. HarperDB vs. Hazelcast
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|Editorial information provided by DB-Engines|
|Name||Apache Doris Xexclude from comparison||HarperDB Xexclude from comparison||Hazelcast Xexclude from comparison|
|Description||An MPP-based analytics DBMS embracing the MySQL protocol||Ultra-low latency distributed database with an intuitive REST API supporting NoSQL and SQL (including joins). Deployment of functions and databases simultaneously with a consolidated node-level architecture.||A widely adopted in-memory data grid|
|Primary database model||Relational DBMS||Document store||Key-value store|
|Secondary database models||Document store JSON support with IMDG 3.12|
|Developer||Apache Software Foundation, originally contributed from Baidu||HarperDB||Hazelcast|
|Current release||1.2.2, February 2023||3.1, August 2021||5.3.2, August 2023|
|License Commercial or Open Source||Open Source Apache Version 2.0||commercial free community edition available||Open Source Apache Version 2; commercial licenses available|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Server operating systems||Linux||Linux|
|All OS with a Java VM|
|Data scheme||yes||dynamic schema||schema-free|
|Typing predefined data types such as float or date||yes||yes JSON data types||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||yes the object must implement a serialization strategy|
|SQL Support of SQL||yes||SQL-like data manipulation statements||SQL-like query language|
|APIs and other access methods||JDBC|
RESTful HTTP/JSON API
RESTful HTTP API
|Supported programming languages||Java||.Net|
|Server-side scripts Stored procedures||user defined functions||Custom Functions since release 3.1||yes Event Listeners, Executor Services|
|Partitioning methods Methods for storing different data on different nodes||horizontal partitioning||A table resides as a whole on one (or more) nodes in a cluster||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||none||yes the nodes on which a table resides can be defined||yes Replicated Map|
|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||Immediate Consistency||Immediate Consistency or Eventual Consistency selectable by user Raft Consensus Algorithm|
|Foreign keys Referential integrity||no||no||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||Atomic execution of specific operations||one or two-phase-commit; repeatable reads; read commited|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes, using LMDB||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||yes||yes|
|User concepts Access control||fine grained access rights according to SQL-standard||Access rights for users and roles||Role-based access control|
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