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DBMS > IBM Db2 warehouse vs. LMDB vs. searchxml vs. TerminusDB vs. VelocityDB

System Properties Comparison IBM Db2 warehouse vs. LMDB vs. searchxml vs. TerminusDB vs. VelocityDB

Editorial information provided by DB-Engines
NameIBM Db2 warehouse infoformerly named IBM dashDB  Xexclude from comparisonLMDB  Xexclude from comparisonsearchxml  Xexclude from comparisonTerminusDB infoformer name was DataChemist  Xexclude from comparisonVelocityDB  Xexclude from comparison
DescriptionCloud-based data warehousing serviceA high performant, light-weight, embedded key-value database libraryDBMS for structured and unstructured content wrapped with an application serverScalable Graph Database platform making enterprise data available by exploiting inferred entities and relationshipsA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database modelRelational DBMSKey-value storeNative XML DBMS
Search engine
Graph DBMSGraph DBMS
Object oriented DBMS
Secondary database modelsDocument store
RDF store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score1.37
Rank#160  Overall
#74  Relational DBMS
Score2.09
Rank#121  Overall
#20  Key-value stores
Score0.03
Rank#390  Overall
#7  Native XML DBMS
#24  Search engines
Score0.23
Rank#316  Overall
#27  Graph DBMS
Score0.11
Rank#354  Overall
#37  Graph DBMS
#15  Object oriented DBMS
Websitewww.ibm.com/­products/­db2/­warehousewww.symas.com/­symas-embedded-database-lmdbwww.searchxml.net/­category/­productsterminusdb.comvelocitydb.com
Technical documentationwww.lmdb.tech/­docwww.searchxml.net/­support/­handoutsterminusdb.github.io/­terminusdb/­#velocitydb.com/­UserGuide
DeveloperIBMSymasinformationpartners gmbhDataChemist Ltd.VelocityDB Inc
Initial release20142011201520182011
Current release0.9.32, January 20241.011.0.0, January 20237.x
License infoCommercial or Open SourcecommercialOpen SourcecommercialOpen Source infoGPL V3commercial
Cloud-based only infoOnly available as a cloud serviceyesnononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageCC++Prolog, RustC#
Server operating systemshostedLinux
Unix
Windows
WindowsLinuxAny that supports .NET
Data schemeyesschema-freeschema-freeyesyes
Typing infopredefined data types such as float or dateyesyesyesyes
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 infoImport/export of XML data possiblenoyesnono
Secondary indexesyesnoyesyes
SQL infoSupport of SQLyesnonoSQL-like query language (WOQL)no
APIs and other access methods.NET Client API
JDBC
ODBC
OLE DB
RESTful HTTP API
WebDAV
XQuery
XSLT
OWL
RESTful HTTP API
WOQL (Web Object Query Language)
.Net
Supported programming languagesJava
JavaScript (Node.js)
Perl
PHP
Python
R
Ruby
.Net
C
C++
Clojure
Go
Haskell
Java
JavaScript (Node.js)
Lisp
Lua
MatLab
Nim
Objective C
OCaml
Perl
PHP
Python
R
Ruby
Rust
Swift
Tcl
C++ infomost other programming languages supported via APIsJavaScript
Python
.Net
Server-side scripts infoStored proceduresPL/SQL, SQL PLnoyes infoon the application serveryesno
TriggersyesnonoyesCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesShardingnonenoneGraph PartitioningSharding
Replication methods infoMethods for redundantly storing data on multiple nodesyesnoneyes infosychronisation to multiple collectionsJournaling Streams
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonononono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integrityyesnonoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACIDmultiple readers, single writerACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyesyesyes
Durability infoSupport for making data persistentyesyesyesyes infoin-memory journalingyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesnoyes
User concepts infoAccess controlfine grained access rights according to SQL-standardnoDomain, group and role-based access control at the document level and for application servicesRole-based access controlBased on Windows Authentication

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More resources
IBM Db2 warehouse infoformerly named IBM dashDBLMDBsearchxmlTerminusDB infoformer name was DataChemistVelocityDB
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