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DBMS > Dgraph vs. Memcached vs. searchxml vs. ToroDB vs. VelocityDB

System Properties Comparison Dgraph vs. Memcached vs. searchxml vs. ToroDB vs. VelocityDB

Editorial information provided by DB-Engines
NameDgraph  Xexclude from comparisonMemcached  Xexclude from comparisonsearchxml  Xexclude from comparisonToroDB  Xexclude from comparisonVelocityDB  Xexclude from comparison
ToroDB seems to be discontinued. Therefore it is excluded from the DB-Engines Ranking.
DescriptionDistributed and scalable native Graph DBMSIn-memory key-value store, originally intended for cachingDBMS for structured and unstructured content wrapped with an application serverA MongoDB-compatible JSON document store, built on top of PostgreSQLA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database modelGraph DBMSKey-value storeNative XML DBMS
Search engine
Document storeGraph DBMS
Object oriented DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score1.45
Rank#156  Overall
#15  Graph DBMS
Score19.42
Rank#32  Overall
#4  Key-value stores
Score0.00
Rank#383  Overall
#7  Native XML DBMS
#25  Search engines
Score0.05
Rank#358  Overall
#36  Graph DBMS
#16  Object oriented DBMS
Websitedgraph.iowww.memcached.orgwww.searchxml.net/­category/­productsgithub.com/­torodb/­servervelocitydb.com
Technical documentationdgraph.io/­docsgithub.com/­memcached/­memcached/­wikiwww.searchxml.net/­support/­handoutsvelocitydb.com/­UserGuide
DeveloperDgraph Labs, Inc.Danga Interactive infooriginally developed by Brad Fitzpatrick for LiveJournalinformationpartners gmbh8KdataVelocityDB Inc
Initial release20162003201520162011
Current release1.6.25, March 20241.07.x
License infoCommercial or Open SourceOpen Source infoApache 2.0Open Source infoBSD licensecommercialOpen Source infoAGPL-V3commercial
Cloud-based only infoOnly available as a cloud servicenonononono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageGoCC++JavaC#
Server operating systemsLinux
OS X
Windows
FreeBSD
Linux
OS X
Unix
Windows
WindowsAll OS with a Java 7 VMAny that supports .NET
Data schemeschema-freeschema-freeschema-freeschema-freeyes
Typing infopredefined data types such as float or dateyesnoyesyes infostring, integer, double, boolean, date, object_idyes
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.noyesnono
Secondary indexesyesnoyesyes
SQL infoSupport of SQLnononono
APIs and other access methodsGraphQL query language
gRPC (using protocol buffers) API
HTTP API
Proprietary protocolRESTful HTTP API
WebDAV
XQuery
XSLT
.Net
Supported programming languagesC#
C++
Go
Java
JavaScript (Node.js)
PHP
Python
Ruby
.Net
C
C++
ColdFusion
Erlang
Java
Lisp
Lua
OCaml
Perl
PHP
Python
Ruby
C++ infomost other programming languages supported via APIs.Net
Server-side scripts infoStored proceduresnonoyes infoon the application serverno
TriggersnonononoCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesyesnonenoneShardingSharding
Replication methods infoMethods for redundantly storing data on multiple nodesSynchronous replication via Raftnone infoRepcached, a Memcached patch, provides this functionallityyes infosychronisation to multiple collectionsSource-replica replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnononono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyEventual Consistency
Immediate Consistency
Immediate Consistency
Foreign keys infoReferential integritynonononono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDnomultiple readers, single writernoACID
Concurrency infoSupport for concurrent manipulation of datayesyesyesyesyes
Durability infoSupport for making data persistentyesnoyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes
User concepts infoAccess controlno infoPlanned for future releasesyes infousing SASL (Simple Authentication and Security Layer) protocolDomain, group and role-based access control at the document level and for application servicesAccess rights for users and rolesBased on Windows Authentication

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More resources
DgraphMemcachedsearchxmlToroDBVelocityDB
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