DBMS > OpenQM vs. Snowflake vs. TerarkDB
System Properties Comparison OpenQM vs. Snowflake vs. TerarkDB
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|Editorial information provided by DB-Engines
|OpenQM also called QM Xexclude from comparison
|Snowflake Xexclude from comparison
|TerarkDB Xexclude from comparison
|QpenQM is a high-performance, self-tuning, multi-value DBMS
|Cloud-based data warehousing service for structured and semi-structured data
|A key-value store forked from RocksDB with advanced compression algorithms. It can be used standalone or as a storage engine for MySQL and MongoDB
|Primary database model
|Rocket Software, originally Martin Phillips
|Snowflake Computing Inc.
|ByteDance, originally Terark
|License Commercial or Open Source
|Open Source GPLv2, extended commercial license available
|commercial restricted open source version available
|Cloud-based only Only available as a cloud service
|DBaaS offerings (sponsored links) Database as a Service
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|Server operating systems
|yes with some exceptions
|yes support of semi-structured data formats (JSON, XML, Avro)
|Typing predefined data types such as float or date
|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.
|SQL Support of SQL
|APIs and other access methods
|Supported programming languages
|Server-side scripts Stored procedures
|user defined functions
|no similar concept for controling cloud resources
|Partitioning methods Methods for storing different data on different nodes
|Replication methods Methods for redundantly storing data on multiple nodes
|MapReduce Offers an API for user-defined Map/Reduce methods
|Consistency concepts Methods to ensure consistency in a distributed system
|Foreign keys Referential integrity
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data
|Concurrency Support for concurrent manipulation of data
|Durability Support for making data persistent
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.
|User concepts Access control
|Access rights can be defined down to the item level
|Users with fine-grained authorization concept, user roles and pluggable authentication
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|CData: Connect to Big Data & NoSQL through standard Drivers.
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|OpenQM also called QM
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