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DBMS > Coveo vs. Memcached vs. Oracle Rdb vs. SpaceTime

System Properties Comparison Coveo vs. Memcached vs. Oracle Rdb vs. SpaceTime

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Editorial information provided by DB-Engines
NameCoveo  Xexclude from comparisonMemcached  Xexclude from comparisonOracle Rdb  Xexclude from comparisonSpaceTime  Xexclude from comparison
DescriptionAI-powered hosted search, recommendation and personalization platform providing tools for both low-code and full-code developmentIn-memory key-value store, originally intended for cachingSpaceTime is a spatio-temporal DBMS with a focus on performance.
Primary database modelSearch engineKey-value storeRelational DBMSSpatial DBMS
Secondary database modelsRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score2.11
Rank#118  Overall
#11  Search engines
Score18.08
Rank#32  Overall
#4  Key-value stores
Score1.14
Rank#178  Overall
#80  Relational DBMS
Score0.03
Rank#392  Overall
#8  Spatial DBMS
Websitewww.coveo.comwww.memcached.orgwww.oracle.com/­database/­technologies/­related/­rdb.htmlwww.mireo.com/­spacetime
Technical documentationdocs.coveo.comgithub.com/­memcached/­memcached/­wikiwww.oracle.com/­database/­technologies/­related/­rdb-doc.html
DeveloperCoveoDanga Interactive infooriginally developed by Brad Fitzpatrick for LiveJournalOracle, originally developed by Digital Equipment Corporation (DEC)Mireo
Initial release2012200319842020
Current release1.6.27, May 20247.4.1.1, 2021
License infoCommercial or Open SourcecommercialOpen Source infoBSD licensecommercialcommercial
Cloud-based only infoOnly available as a cloud serviceyesnonono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageCC++
Server operating systemshostedFreeBSD
Linux
OS X
Unix
Windows
HP Open VMSLinux
Data schemehybrid - fields need to be configured prior to indexing, but relationships can be exploited at query time without pre-configurationschema-freeFlexible Schema (defined schema, partial schema, schema free)yes
Typing infopredefined data types such as float or dateyesnoyesyes
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.nonono
Secondary indexesyesnoyesno
SQL infoSupport of SQLnonoyesA subset of ANSI SQL is implemented
APIs and other access methodsRESTful HTTP APIProprietary protocolRESTful HTTP API
Supported programming languagesC#
Java
JavaScript
Python
.Net
C
C++
ColdFusion
Erlang
Java
Lisp
Lua
OCaml
Perl
PHP
Python
Ruby
C#
C++
Python
Server-side scripts infoStored proceduresnonono
Triggersyesnono
Partitioning methods infoMethods for storing different data on different nodesyesnoneFixed-grid hypercubes
Replication methods infoMethods for redundantly storing data on multiple nodesyesnone infoRepcached, a Memcached patch, provides this functionallityReal-time block device replication (DRBD)
MapReduce infoOffers an API for user-defined Map/Reduce methodsnononono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integrityyesnoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datayesnoyes, on a single nodeno
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentyesnoyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.nono
User concepts infoAccess controlgranular access controls, API key management, content filtersyes infousing SASL (Simple Authentication and Security Layer) protocolyes

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CoveoMemcachedOracle RdbSpaceTime
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