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DBMS > Memcached vs. OpenTenBase vs. VelocityDB

System Properties Comparison Memcached vs. OpenTenBase vs. VelocityDB

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Editorial information provided by DB-Engines
NameMemcached  Xexclude from comparisonOpenTenBase  Xexclude from comparisonVelocityDB  Xexclude from comparison
DescriptionIn-memory key-value store, originally intended for cachingAn enterprise-level distributed HTAP open source database based on PostgreSQLA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database modelKey-value storeRelational DBMSGraph DBMS
Object oriented DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score16.84
Rank#32  Overall
#4  Key-value stores
Score0.00
Rank#385  Overall
#159  Relational DBMS
Score0.00
Rank#385  Overall
#40  Graph DBMS
#21  Object oriented DBMS
Websitewww.memcached.orggithub.com/­OpenTenBase/­OpenTenBase
www.opentenbase.org
velocitydb.com
Technical documentationgithub.com/­memcached/­memcached/­wikidocs.opentenbase.org
docs.opentenbase.org/­en
velocitydb.com/­UserGuide
DeveloperDanga Interactive infooriginally developed by Brad Fitzpatrick for LiveJournalOpenAtom Foundation, previously TencentVelocityDB Inc
Initial release20032011
Current release1.6.29, June 20242.5, January 20247.x
License infoCommercial or Open SourceOpen Source infoBSD licenseOpen Source infoBSD-3commercial
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageCC#
Server operating systemsFreeBSD
Linux
OS X
Unix
Windows
LinuxAny that supports .NET
Data schemeschema-freeyesyes
Typing infopredefined data types such as float or datenoyesyes
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.no
Secondary indexesnoyesyes
SQL infoSupport of SQLnoyesno
APIs and other access methodsProprietary protocol.Net
Supported programming languages.Net
C
C++
ColdFusion
Erlang
Java
Lisp
Lua
OCaml
Perl
PHP
Python
Ruby
C
Go
Java
PHP
Python
.Net
Server-side scripts infoStored proceduresnono
TriggersnoyesCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesnoneShardingSharding
Replication methods infoMethods for redundantly storing data on multiple nodesnone infoRepcached, a Memcached patch, provides this functionallityyes
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 integritynoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentnoyesyes
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) protocolAccess rights for users, groups and roles according to SQL-standardBased on Windows Authentication

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More resources
MemcachedOpenTenBaseVelocityDB
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