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DBMS > Postgres-XL vs. Realm

System Properties Comparison Postgres-XL vs. Realm

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Our visitors often compare Postgres-XL and Realm with MongoDB, Microsoft Azure Cosmos DB and TimescaleDB.

Editorial information provided by DB-Engines
NamePostgres-XL  Xexclude from comparisonRealm  Xexclude from comparison
DescriptionBased on PostgreSQL enhanced with MPP and write-scale-out cluster featuresA DBMS built for use on mobile devices that’s a fast, easy to use alternative to SQLite and Core Data
Primary database modelRelational DBMSDocument store
Secondary database modelsDocument store
Spatial DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.52
Rank#267  Overall
#121  Relational DBMS
Score7.96
Rank#55  Overall
#9  Document stores
Websitewww.postgres-xl.orgrealm.io
Technical documentationwww.postgres-xl.org/­documentationrealm.io/­docs
DeveloperRealm, acquired by MongoDB in May 2019
Initial release2014 infosince 2012, originally named StormDB2014
Current release10 R1, October 2018
License infoCommercial or Open SourceOpen Source infoMozilla public licenseOpen Source
Cloud-based only infoOnly available as a cloud servicenono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageC
Server operating systemsLinux
macOS
Android
Backend: server-less
iOS
Windows
Data schemeyesyes
Typing infopredefined data types such as float or dateyesyes
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.yes infoXML type, but no XML query functionalityno
Secondary indexesyesyes
SQL infoSupport of SQLyes infodistributed, parallel query executionno
APIs and other access methodsADO.NET
JDBC
native C library
ODBC
streaming API for large objects
Supported programming languages.Net
C
C++
Delphi
Erlang
Java
JavaScript (Node.js)
Perl
PHP
Python
Tcl
.Net
Java infowith Android only
Objective-C
React Native
Swift
Server-side scripts infoStored proceduresuser defined functionsno inforuns within the applications so server-side scripts are unnecessary
Triggersyesyes infoChange Listeners
Partitioning methods infoMethods for storing different data on different nodeshorizontal partitioningnone
Replication methods infoMethods for redundantly storing data on multiple nodesnone
MapReduce infoOffers an API for user-defined Map/Reduce methodsnono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integrityyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACID infoMVCCACID
Concurrency infoSupport for concurrent manipulation of datayes
Durability infoSupport for making data persistentyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes infoIn-Memory realm
User concepts infoAccess controlfine grained access rights according to SQL-standardyes

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Postgres-XLRealm
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