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DBMS > KairosDB vs. SQL.JS vs. VelocityDB

System Properties Comparison KairosDB vs. SQL.JS vs. VelocityDB

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Editorial information provided by DB-Engines
NameKairosDB  Xexclude from comparisonSQL.JS  Xexclude from comparisonVelocityDB  Xexclude from comparison
DescriptionDistributed Time Series DBMS based on Cassandra or H2Port of SQLite to JavaScriptA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database modelTime Series DBMSRelational DBMSGraph DBMS
Object oriented DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.62
Rank#239  Overall
#20  Time Series DBMS
Score0.53
Rank#252  Overall
#116  Relational DBMS
Score0.05
Rank#358  Overall
#36  Graph DBMS
#16  Object oriented DBMS
Websitegithub.com/­kairosdb/­kairosdbsql.js.orgvelocitydb.com
Technical documentationkairosdb.github.iosql.js.org/­documentation/­index.htmlvelocitydb.com/­UserGuide
DeveloperAlon Zakai infoenhancements implemented by othersVelocityDB Inc
Initial release201320122011
Current release1.2.2, November 20187.x
License infoCommercial or Open SourceOpen Source infoApache 2.0Open Sourcecommercial
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJavaJavaScriptC#
Server operating systemsLinux
OS X
Windows
server-less, requires a JavaScript environment (browser, Node.js)Any that supports .NET
Data schemeschema-freeyesyes
Typing infopredefined data types such as float or dateyesyesyes
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 indexesnoyes
SQL infoSupport of SQLnoyes infoSQL-92 is not fully supportedno
APIs and other access methodsGraphite protocol
HTTP REST
Telnet API
JavaScript API.Net
Supported programming languagesJava
JavaScript infoNode.js
PHP
Python
JavaScript.Net
Server-side scripts infoStored proceduresnonono
TriggersnonoCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesSharding infobased on CassandranoneSharding
Replication methods infoMethods for redundantly storing data on multiple nodesselectable replication factor infobased on Cassandranone
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual Consistency infobased on Cassandra
Immediate Consistency infobased on Cassandra
noneImmediate Consistency
Foreign keys infoReferential integritynoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyes
Durability infoSupport for making data persistentyesno infoexcept by serializing a db to a fileyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyesyes
User concepts infoAccess controlsimple password-based access controlnoBased on Windows Authentication

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More resources
KairosDBSQL.JSVelocityDB
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