DBMS > Hive vs. IBM Db2 Event Store vs. VelocityDB
System Properties Comparison Hive vs. IBM Db2 Event Store vs. VelocityDB
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|Editorial information provided by DB-Engines|
|Name||Hive Xexclude from comparison||IBM Db2 Event Store Xexclude from comparison||VelocityDB Xexclude from comparison|
|Description||data warehouse software for querying and managing large distributed datasets, built on Hadoop||Distributed Event Store optimized for Internet of Things use cases||A .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)|
|Primary database model||Relational DBMS||Event Store|
Time Series DBMS
Object oriented DBMS
|Developer||Apache Software Foundation initially developed by Facebook||IBM||VelocityDB Inc|
|Current release||3.1.3, April 2022||2.0||7.x|
|License Commercial or Open Source||Open Source Apache Version 2||commercial free developer edition available||commercial|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Implementation language||Java||C and C++||C#|
|Server operating systems||All OS with a Java VM||Linux Linux, macOS, Windows for the developer addition||Any that supports .NET|
|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|
|SQL Support of SQL||SQL-like DML and DDL statements||yes through the embedded Spark runtime||no|
|APIs and other access methods||JDBC|
RESTful HTTP API
|Supported programming languages||C++|
|Server-side scripts Stored procedures||yes user defined functions and integration of map-reduce||yes||no|
|Triggers||no||no||Callbacks are triggered when data changes|
|Partitioning methods Methods for storing different data on different nodes||Sharding||Sharding||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||selectable replication factor||Active-active shard replication|
|MapReduce Offers an API for user-defined Map/Reduce methods||yes query execution via MapReduce||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency||Eventual Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||no||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||no||ACID|
|Concurrency Support for concurrent manipulation of data||yes||No - written data is immutable||yes|
|Durability Support for making data persistent||yes||Yes - Synchronous writes to local disk combined with replication and asynchronous writes in parquet format to permanent shared storage||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||fine grained access rights according to SQL-standard||Based on Windows Authentication|
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|Hive||IBM Db2 Event Store||VelocityDB|
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