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DBMS > NCache vs. Postgres-XL vs. PostgreSQL

System Properties Comparison NCache vs. Postgres-XL vs. PostgreSQL

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Editorial information provided by DB-Engines
NameNCache  Xexclude from comparisonPostgres-XL  Xexclude from comparisonPostgreSQL  Xexclude from comparison
DescriptionNCache is a 100% .NET / .NET Core Open Source in-memory distributed cache.Based on PostgreSQL enhanced with MPP and write-scale-out cluster featuresWidely used open source RDBMS infoDeveloped as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL
Primary database modelKey-value storeRelational DBMSRelational DBMS infowith object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.
Secondary database modelsDocument store
Search engine infoUsing distributed Lucene
Document storeDocument store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.91
Rank#177  Overall
#30  Key-value stores
Score0.51
Rank#230  Overall
#113  Relational DBMS
Score549.29
Rank#4  Overall
#4  Relational DBMS
Websitewww.alachisoft.com/­ncachewww.postgres-xl.orgwww.postgresql.org
Technical documentationwww.alachisoft.com/­resources/­docswww.postgres-xl.org/­documentationwww.postgresql.org/­docs
DeveloperAlachisoftPostgreSQL Global Development Group infowww.postgresql.org/­developer
Initial release20052014 infosince 2012, originally named StormDB1989 info1989: Postgres, 1996: PostgreSQL
Current release5.1, November 202010 R1, October 201813.2 , February 2021
License infoCommercial or Open SourceOpen Source infoEnterprise Edition availableOpen Source infoMozilla public licenseOpen Source infoBSD
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
ScaleGrid for PostgreSQL: Fully managed PostgreSQL hosting on AWS, Azure and DigitalOcean with high availability and SSH access on the #1 multi-cloud DBaaS.
Implementation languageC#, .NET, .NET CoreCC
Server operating systemsLinux
Windows
Linux
macOS
FreeBSD
HP-UX
Linux
NetBSD
OpenBSD
OS X
Solaris
Unix
Windows
Data schemeschema-freeyesyes
Typing infopredefined data types such as float or datepartial infoSupported data types are Lists, Queues, Hashsets, Dictionary and Counteryesyes
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.noyes infoXML type, but no XML query functionalityyes infospecific XML-type available, but no XML query functionality.
Secondary indexesyesyesyes
SQL infoSupport of SQLSQL-like query syntax and LINQ for searching the cache. Cache Synchronization with SQL Server using SQL dependency.yes infodistributed, parallel query executionyes infostandard with numerous extensions
APIs and other access methodsIDistributedCache
JCache
LINQ
Proprietary native API
ADO.NET
JDBC
native C library
ODBC
streaming API for large objects
ADO.NET
JDBC
native C library
ODBC
streaming API for large objects
Supported programming languages.Net
.Net Core
C#
Java
Visual Basic.NET
.Net
C
C++
Delphi
Erlang
Java
JavaScript (Node.js)
Perl
PHP
Python
Tcl
.Net
C
C++
Delphi
Java infoJDBC
JavaScript (Node.js)
Perl
PHP
Python
Tcl
Server-side scripts infoStored proceduresno infosupport for stored procedures with SQL-Server CLRuser defined functionsuser defined functions inforealized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.
Triggersyes infoNotificationsyesyes
Partitioning methods infoMethods for storing different data on different nodesyeshorizontal partitioningpartitioning by range, list and (since PostgreSQL 11) by hash
Replication methods infoMethods for redundantly storing data on multiple nodesyes, with selectable consistency levelSource-replica replication infoother methods possible by using 3rd party extensions
MapReduce infoOffers an API for user-defined Map/Reduce methodsyesnono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual Consistency
Immediate Consistency
Strong Eventual Consistency over WAN with Conflict Resolution using Bridge Topology
Immediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynoyesyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataoptimistic locking and pessimistic lockingACID infoMVCCACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesnono
User concepts infoAccess controlAuthentication to access the cache via Active Directory/LDAP (possible roles: user, administrator)fine grained access rights according to SQL-standardfine grained access rights according to SQL-standard
More information provided by the system vendor
NCachePostgres-XLPostgreSQL
Specific characteristicsNCache has been the market leader in .NET Distributed Caching since 2005 . NCache...
» more
Competitive advantagesNCache is 100% .NET/ .NET Core based which fully supports ASP.NET Core Sessions ,...
» more
Typical application scenariosNCache enables industries like retail, finance, banking IoT, travel, ecommerce, healthcare...
» more
Key customersBank of America, Citi, Natures Way, Charter Spectrum, Barclays, Henry Schein, GBM,...
» more
Market metricsMarket Leader in .NET Distributed Caching since 2005.
» more
Licensing and pricing modelsNCache Open Source is free on an as-is basis without any support. NCache Enterprise...
» more
News

Migrating Smoothly from Redis to NCache
25 January 2021

Try NCache Live without Download and Setup
22 January 2021

Create Read Intensive Applications using NCache
28 December 2020

Remote Monitoring of Cache Clusters with NCache
21 December 2020

Keep your Cache in Sync with PostgreSQL
21 December 2020

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and for displaying vendor-provided information such as key customers, competitive advantages and market metrics.

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More resources
NCachePostgres-XLPostgreSQL
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Recent citations in the news

Custom Response Caching Using NCache in ASP.NET Core
22 April 2020, InfoQ.com

How to use NCache in ASP.Net Core
25 February 2019, InfoWorld

NCache Distributed Cache for .NET Gets Open Sourced
28 January 2015, Visual Studio Magazine

Basic NCache is Now Open Source
10 March 2015, InfoQ.com

Velocity: Microsoft's Distributed In-Memory Cache
4 June 2008, InfoQ.com

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