DBMS > IBM Db2 vs. Quasardb vs. TimescaleDB
System Properties Comparison IBM Db2 vs. Quasardb vs. TimescaleDB
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|Editorial information provided by DB-Engines|
|Name||IBM Db2 formerly named DB2 or IBM Database 2 Xexclude from comparison||Quasardb Xexclude from comparison||TimescaleDB Xexclude from comparison|
|Description||Common in IBM host environments, 2 different versions for host and Windows/Linux||Distributed, high-performance timeseries database||A time series DBMS optimized for fast ingest and complex queries, based on PostgreSQL|
|Primary database model||Relational DBMS Since Version 10.5 support for JSON/BSON documents compatible with MongoDB||Time Series DBMS||Time Series DBMS|
|Secondary database models||Document store|
RDF store in Db2 LUW (Linux, Unix, Windows)
Spatial DBMS with Db2 Spatial Extender
|Initial release||1983 host version||2009||2017|
|Current release||12.1, October 2016||3.13.3, April 2022||2.6.0, February 2022|
|License Commercial or Open Source||commercial free version is available||commercial Free community edition, Non-profit organizations and non-commercial usage are eligible for free licenses||Open Source Apache 2.0|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Implementation language||C and C++||C++||C|
|Server operating systems||AIX|
|Typing predefined data types such as float or date||yes||yes integer and binary||numerics, strings, booleans, arrays, JSON blobs, geospatial dimensions, currencies, binary data, other complex data types|
|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||yes with tags||yes|
|SQL Support of SQL||yes||SQL-like query language||yes full PostgreSQL SQL syntax|
|APIs and other access methods||ADO.NET|
JSON style queries MongoDB compatible
native C library
streaming API for large objects
|Supported programming languages||C|
|Server-side scripts Stored procedures||yes||no||user defined functions, PL/pgSQL, PL/Tcl, PL/Perl, PL/Python, PL/Java, PL/PHP, PL/R, PL/Ruby, PL/Scheme, PL/Unix shell|
|Partitioning methods Methods for storing different data on different nodes||Sharding only with Windows/Unix/Linux Version||Sharding consistent hashing||yes, across time and space (hash partitioning) attributes|
|Replication methods Methods for redundantly storing data on multiple nodes||yes with separate tools (MQ, InfoSphere)||Source-replica replication with selectable replication factor||Source-replica replication with hot standby and reads on replicas|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||with Hadoop integration||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||yes||no||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|
|Durability Support for making data persistent||yes||yes by using LevelDB||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes Transient mode||no|
|User concepts Access control||fine grained access rights according to SQL-standard||Cryptographically strong user authentication and audit trail||fine grained access rights according to SQL-standard|
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|IBM Db2 formerly named DB2 or IBM Database 2||Quasardb||TimescaleDB|
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