DBMS > IBM Db2 warehouse vs. PouchDB vs. Splunk

System Properties Comparison IBM Db2 warehouse vs. PouchDB vs. Splunk

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Editorial information provided by DB-Engines
Name	IBM Db2 warehouse formerly named IBM dashDB  Xexclude from comparison	PouchDB  Xexclude from comparison	Splunk  Xexclude from comparison
Description	Cloud-based data warehousing service	JavaScript DBMS with an API inspired by CouchDB	Analytics Platform for Big Data
Primary database model	Relational DBMS	Document store	Search engine
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 1.83 Rank #130   Overall #63   Relational DBMS	Score 3.10 Rank #99   Overall #18   Document stores	Score 95.56 Rank #14   Overall #2   Search engines
Website	www.ibm.com/­products/­db2-warehouse	pouchdb.com	www.splunk.com
Technical documentation		pouchdb.com/­guides	docs.splunk.com/­Documentation/­Splunk
Developer	IBM	Apache Software Foundation	Splunk Inc.
Initial release	2014	2012	2003
Current release		7.1.1, June 2019
License Commercial or Open Source	commercial	Open Source	commercial Limited free edition and free developer edition available
Cloud-based only Only available as a cloud service	yes	no	no
DBaaS offerings (sponsored links) Database as a Service Providers of DBaaS offerings, please contact us to be listed.
Implementation language		JavaScript
Server operating systems	hosted	server-less, requires a JavaScript environment (browser, Node.js)	Linux OS X Solaris Windows
Data scheme	yes	schema-free	yes
Typing predefined data types such as float or date	yes	no	yes
XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.	no Import/export of XML data possible	no	yes
Secondary indexes	yes	yes via views	yes
SQL Support of SQL	yes	no	no Splunk Search Processing Language for search commands
APIs and other access methods	.NET Client API JDBC ODBC OLE DB	HTTP REST only for PouchDB Server JavaScript API	HTTP REST
Supported programming languages	Java JavaScript (Node.js) Perl PHP Python R Ruby	JavaScript	C# Java JavaScript PHP Python Ruby
Server-side scripts Stored procedures	PL/SQL, SQL PL	View functions in JavaScript	yes
Triggers	yes	yes	yes
Partitioning methods Methods for storing different data on different nodes	Sharding	Sharding with a proxy-based framework, named couchdb-lounge	Sharding
Replication methods Methods for redundantly storing data on multiple nodes	yes	Multi-source replication also with CouchDB databases Source-replica replication also with CouchDB databases	Multi-source replication
MapReduce Offers an API for user-defined Map/Reduce methods	no	yes	yes
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency	Eventual Consistency	Eventual Consistency
Foreign keys Referential integrity	yes	no	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	ACID	no	no A 'Transaction' in Splunk has a different meaning: grouping related events into a single one for later searching
Concurrency Support for concurrent manipulation of data	yes		yes
Durability Support for making data persistent	yes	yes by using IndexedDB, WebSQL or LevelDB as backend	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	yes	yes	no
User concepts Access control	fine grained access rights according to SQL-standard	no	Access rights for users and roles
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More resources
	IBM Db2 warehouse formerly named IBM dashDB	PouchDB	Splunk
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