DBMS > Amazon SimpleDB vs. PostgreSQL vs. SiteWhere
System Properties Comparison Amazon SimpleDB vs. PostgreSQL vs. SiteWhere
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|Editorial information provided by DB-Engines|
|Name||Amazon SimpleDB Xexclude from comparison||PostgreSQL Xexclude from comparison||SiteWhere Xexclude from comparison|
|Description||Hosted simple database service by Amazon, with the data stored in the Amazon Cloud. There is an unrelated product called SimpleDB developed by Edward Sciore||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||M2M integration platform for persisting/querying time series data|
|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||Amazon||PostgreSQL Global Development Group www.postgresql.org/developer||SiteWhere|
|Initial release||2007||1989 1989: Postgres, 1996: PostgreSQL||2010|
|Current release||13.2 , February 2021|
|License Commercial or Open Source||commercial||Open Source BSD||Open Source Common Public Attribution License Version 1.0|
|Cloud-based only Only available as a cloud service||yes||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|ScaleGrid for PostgreSQL: Fully managed PostgreSQL hosting on AWS, Azure and DigitalOcean with high availability and SSH access on the #1 multi-cloud DBaaS.|
|Server operating systems||hosted||FreeBSD|
|Data scheme||schema-free||yes||predefined scheme|
|Typing predefined data types such as float or date||no||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.||yes specific XML-type available, but no XML query functionality.||no|
|Secondary indexes||yes All columns are indexed automatically||yes||no|
|SQL Support of SQL||no||yes standard with numerous extensions||no|
|APIs and other access methods||RESTful HTTP API||ADO.NET|
native C library
streaming API for large objects
|Supported programming languages||.Net|
|Server-side scripts Stored procedures||no||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.|
|Partitioning methods Methods for storing different data on different nodes||none Sharding must be implemented in the application||partitioning by range, list and (since PostgreSQL 11) by hash||Sharding based on HBase|
|Replication methods Methods for redundantly storing data on multiple nodes||yes||Source-replica replication other methods possible by using 3rd party extensions||selectable replication factor based on HBase|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency|
Immediate Consistency can be specified for read operations
|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 Concurrent data updates can be detected by the application||ACID||no|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||no|
|User concepts Access control||Access rights for users and roles can be defined via the AWS Identity and Access Management (IAM)||fine grained access rights according to SQL-standard||Users with fine-grained authorization concept|
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