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DBMS > Memcached vs. PouchDB vs. TerminusDB

System Properties Comparison Memcached vs. PouchDB vs. TerminusDB

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Editorial information provided by DB-Engines
NameMemcached  Xexclude from comparisonPouchDB  Xexclude from comparisonTerminusDB infoformer name was DataChemist  Xexclude from comparison
DescriptionIn-memory key-value store, originally intended for cachingJavaScript DBMS with an API inspired by CouchDBScalable Graph Database platform making enterprise data available by exploiting inferred entities and relationships
Primary database modelKey-value storeDocument storeGraph DBMS
Secondary database modelsDocument store
RDF store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score20.74
Rank#32  Overall
#4  Key-value stores
Score2.35
Rank#116  Overall
#22  Document stores
Score0.22
Rank#323  Overall
#28  Graph DBMS
Websitewww.memcached.orgpouchdb.comterminusdb.com
Technical documentationgithub.com/­memcached/­memcached/­wikipouchdb.com/­guidesterminusdb.github.io/­terminusdb/­#
DeveloperDanga Interactive infooriginally developed by Brad Fitzpatrick for LiveJournalApache Software FoundationDataChemist Ltd.
Initial release200320122018
Current release1.6.25, March 20247.1.1, June 201911.0.0, January 2023
License infoCommercial or Open SourceOpen Source infoBSD licenseOpen SourceOpen Source infoGPL V3
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageCJavaScriptProlog, Rust
Server operating systemsFreeBSD
Linux
OS X
Unix
Windows
server-less, requires a JavaScript environment (browser, Node.js)Linux
Data schemeschema-freeschema-freeyes
Typing infopredefined data types such as float or datenonoyes
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.nono
Secondary indexesnoyes infovia views
SQL infoSupport of SQLnonoSQL-like query language (WOQL)
APIs and other access methodsProprietary protocolHTTP REST infoonly for PouchDB Server
JavaScript API
OWL
RESTful HTTP API
WOQL (Web Object Query Language)
Supported programming languages.Net
C
C++
ColdFusion
Erlang
Java
Lisp
Lua
OCaml
Perl
PHP
Python
Ruby
JavaScriptJavaScript
Python
Server-side scripts infoStored proceduresnoView functions in JavaScriptyes
Triggersnoyesyes
Partitioning methods infoMethods for storing different data on different nodesnoneSharding infowith a proxy-based framework, named couchdb-loungeGraph Partitioning
Replication methods infoMethods for redundantly storing data on multiple nodesnone infoRepcached, a Memcached patch, provides this functionallityMulti-source replication infoalso with CouchDB databases
Source-replica replication infoalso with CouchDB databases
Journaling Streams
MapReduce infoOffers an API for user-defined Map/Reduce methodsnoyesno
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual Consistency
Foreign keys infoReferential integritynonoyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanonoACID
Concurrency infoSupport for concurrent manipulation of datayesyes
Durability infoSupport for making data persistentnoyes infoby using IndexedDB, WebSQL or LevelDB as backendyes infoin-memory journaling
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yes
User concepts infoAccess controlyes infousing SASL (Simple Authentication and Security Layer) protocolnoRole-based access control

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More resources
MemcachedPouchDBTerminusDB infoformer name was DataChemist
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