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DBMS > Derby vs. Kdb vs. NCache vs. Weaviate

System Properties Comparison Derby vs. Kdb vs. NCache vs. Weaviate

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Editorial information provided by DB-Engines
NameDerby infooften called Apache Derby, originally IBM Cloudscape; contained in the Java SDK as JavaDB  Xexclude from comparisonKdb  Xexclude from comparisonNCache  Xexclude from comparisonWeaviate  Xexclude from comparison
DescriptionFull-featured RDBMS with a small footprint, either embedded into a Java application or used as a database server.High performance Time Series DBMSOpen-Source and Enterprise in-memory Key-Value StoreAn AI-native realtime vector database engine that integrates scalable machine learning models.
Primary database modelRelational DBMSTime Series DBMS
Vector DBMS
Key-value storeVector DBMS
Secondary database modelsRelational DBMSDocument store
Search engine infoUsing distributed Lucene
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score4.71
Rank#69  Overall
#37  Relational DBMS
Score7.55
Rank#53  Overall
#3  Time Series DBMS
#1  Vector DBMS
Score0.94
Rank#195  Overall
#29  Key-value stores
Score1.73
Rank#143  Overall
#5  Vector DBMS
Websitedb.apache.org/­derbykx.comwww.alachisoft.com/­ncachegithub.com/­weaviate/­weaviate
weaviate.io
Technical documentationdb.apache.org/­derby/­manuals/­index.htmlcode.kx.comwww.alachisoft.com/­resources/­docsweaviate.io/­developers/­weaviate
DeveloperApache Software FoundationKx Systems, a division of First Derivatives plcAlachisoftWeaviate B.V.
Initial release19972000 infokdb was released 2000, kdb+ in 200320052019
Current release10.17.1.0, November 20233.6, May 20185.3.3, April 20241.19, May 2023
License infoCommercial or Open SourceOpen Source infoApache version 2commercial infofree 32-bit versionOpen Source infoEnterprise Edition availableOpen Source infocommercial license available with Weaviate Enterprise
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJavaqC#, .NET, .NET Core, JavaGo
Server operating systemsAll OS with a Java VMLinux
OS X
Solaris
Windows
Linux
Windows
Data schemeyesyesschema-freeyes, maps to GraphQL interface
Typing infopredefined data types such as float or dateyesyespartial infoSupported data types are Lists, Queues, Hashsets, Dictionary and Counteryes infostring, int, float, geo point, date, cross reference, fuzzy references
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.yesyesnono
Secondary indexesyesyes infotable attribute 'grouped'yesyes infoall data objects are indexed in a semantic vector space (the Contextionary), all primitive fields are indexed
SQL infoSupport of SQLyesSQL-like query language (q)SQL-like query syntax and LINQ for searching the cache. Cache Synchronization with SQL Server using SQL dependency.GraphQL is used as query language
APIs and other access methodsJDBCHTTP API
JDBC
Jupyter
Kafka
ODBC
WebSocket
IDistributedCache
JCache
LINQ
Proprietary native API
GraphQL query language
RESTful HTTP/JSON API
Supported programming languagesJavaC
C#
C++
Go
J
Java
JavaScript
Lua
MatLab
Perl
PHP
Python
R
Scala
.Net
.Net Core
C#
Java
JavaScript (Node.js)
Python
Scala
JavaScript / TypeScript
Python
Server-side scripts infoStored proceduresJava Stored Proceduresuser defined functionsno infosupport for stored procedures with SQL-Server CLRno
Triggersyesyes infowith viewsyes infoNotificationsno
Partitioning methods infoMethods for storing different data on different nodesnonehorizontal partitioningyesSharding
Replication methods infoMethods for redundantly storing data on multiple nodesSource-replica replicationSource-replica replicationyes, with selectable consistency levelyes
MapReduce infoOffers an API for user-defined Map/Reduce methodsnono infosimilar paradigm used for internal processingyesno
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyEventual Consistency
Immediate Consistency
Strong Eventual Consistency over WAN with Conflict Resolution using Bridge Topology
Eventual Consistency
Foreign keys infoReferential integrityyesyesnono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDnooptimistic locking and pessimistic lockingno
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes
Durability infoSupport for making data persistentyesyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesyesyes
User concepts infoAccess controlfine grained access rights according to SQL-standardrights management via user accountsAuthentication to access the cache via Active Directory/LDAP (possible roles: user, administrator)API Keys
OpenID Connect Discovery
More information provided by the system vendor
Derby infooften called Apache Derby, originally IBM Cloudscape; contained in the Java SDK as JavaDBKdbNCacheWeaviate
Specific characteristicsIntegrated columnar database & programming system for streaming, real time and historical...
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NCache has been the market leader in .NET Distributed Caching since 2005 . NCache...
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Weaviate is an open source vector database that is robust, scalable, cloud-native,...
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Competitive advantagesprovides seamless scalability; runs on industry standard server platforms; is top-ranked...
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NCache is 100% .NET/ .NET Core based which fully supports ASP.NET Core Sessions ,...
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Flexible deployment - Free, open source or fully-managed cloud vector database service...
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Typical application scenariostick database streaming sensor data massive intelligence applications oil and gas...
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NCache enables industries like retail, finance, banking IoT, travel, ecommerce, healthcare...
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As a database supporting the development of generative AI and semantic search applications...
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Key customersGoldman Sachs Morgan Stanley Merrill Lynch J.P. Morgan Deutsche Bank IEX Securities...
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Bank of America, Citi, Natures Way, Charter Spectrum, Barclays, Henry Schein, GBM,...
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All companies that have data. ​
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Market metricskdb+ performance and reliability proven by our customers in critical infrastructure...
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Market Leader in .NET Distributed Caching since 2005.
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As of mid 2023: Over 2 million open source downloads 3500+ Weaviate Slack community...
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Licensing and pricing modelsupon request
» more
NCache Open Source is free on an as-is basis without any support. NCache Enterprise...
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Weaviate is open-source, and free to use. Weaviate is also available as a fully managed...
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More resources
Derby infooften called Apache Derby, originally IBM Cloudscape; contained in the Java SDK as JavaDBKdbNCacheWeaviate
DB-Engines blog posts

Weaviate, an ANN Database with CRUD support
2 February 2021,  Etienne Dilocker, SeMI Technologies (sponsor) 

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