DBMS > Cloudflare Workers KV vs. PostgreSQL vs. Quasardb
System Properties Comparison Cloudflare Workers KV vs. PostgreSQL vs. Quasardb
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|Editorial information provided by DB-Engines|
|Name||Cloudflare Workers KV Xexclude from comparison||PostgreSQL Xexclude from comparison||Quasardb Xexclude from comparison|
|Description||A global, low-latency, key-value store for applications on Cloudflare with exceptionally high read volumes and low-latency.||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||Distributed, high-performance timeseries database|
|Primary database model||Key-value store||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.||Time Series DBMS|
|Secondary database models||Document store|
|Developer||Cloudflare||PostgreSQL Global Development Group www.postgresql.org/developer||quasardb|
|Initial release||2018||1989 1989: Postgres, 1996: PostgreSQL||2009|
|Current release||14.4, June 2022||3.13.3, April 2022|
|License Commercial or Open Source||commercial||Open Source BSD||commercial Free community edition, Non-profit organizations and non-commercial usage are eligible for free licenses|
|Cloud-based only Only available as a cloud service||yes||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Server operating systems||hosted||FreeBSD|
|Typing predefined data types such as float or date||no||yes||yes integer and binary|
|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 specific XML-type available, but no XML query functionality.||no|
|Secondary indexes||no||yes||yes with tags|
|SQL Support of SQL||no||yes standard with numerous extensions||SQL-like query language|
|APIs and other access methods||HTTP REST|
native C library
streaming API for large objects
|Supported programming languages||C|
|Server-side scripts Stored procedures||no||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.||no|
|Partitioning methods Methods for storing different data on different nodes||partitioning by range, list and (since PostgreSQL 11) by hash||Sharding consistent hashing|
|Replication methods Methods for redundantly storing data on multiple nodes||yes||Source-replica replication other methods possible by using 3rd party extensions||Source-replica replication with selectable replication factor|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||with Hadoop integration|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes by using LevelDB|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||no||yes Transient mode|
|User concepts Access control||fine grained access rights according to SQL-standard||Cryptographically strong user authentication and audit trail|
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|Cloudflare Workers KV||PostgreSQL||Quasardb|
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