DBMS > Atos Standard Common Repository vs. Hypertable vs. Splunk vs. VelocityDB

System Properties Comparison Atos Standard Common Repository vs. Hypertable vs. Splunk vs. VelocityDB

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Editorial information provided by DB-Engines
Name	Atos Standard Common Repository  Xexclude from comparison	Hypertable  Xexclude from comparison	Splunk  Xexclude from comparison	VelocityDB  Xexclude from comparison
	This system has been discontinued and will be removed from the DB-Engines ranking.	Hypertable has stopped its further development with March 2016 and is removed from the DB-Engines ranking.
Description	Highly scalable database system, designed for managing session and subscriber data in modern mobile communication networks	An open source BigTable implementation based on distributed file systems such as Hadoop	Analytics Platform for Big Data	A .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database model	Document store Key-value store	Wide column store	Search engine	Graph DBMS Object oriented DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart			Score 89.10 Rank #14   Overall #2   Search engines	Score 0.11 Rank #354   Overall #37   Graph DBMS #15   Object oriented DBMS
Website	atos.net/en/convergence-creators/portfolio/standard-common-repository		www.splunk.com	velocitydb.com
Technical documentation			docs.splunk.com/­Documentation/­Splunk	velocitydb.com/­UserGuide
Developer	Atos Convergence Creators	Hypertable Inc.	Splunk Inc.	VelocityDB Inc
Initial release	2016	2009	2003	2011
Current release	1703	0.9.8.11, March 2016		7.x
License Commercial or Open Source	commercial	Open Source GNU version 3. Commercial license available	commercial Limited free edition and free developer edition available	commercial
Cloud-based only Only available as a cloud service	no	no	no	no
DBaaS offerings (sponsored links) Database as a Service Providers of DBaaS offerings, please contact us to be listed.
Implementation language	Java	C++		C#
Server operating systems	Linux	Linux OS X Windows an inofficial Windows port is available	Linux OS X Solaris Windows	Any that supports .NET
Data scheme	Schema and schema-less with LDAP views	schema-free	yes	yes
Typing predefined data types such as float or date	optional	no	yes	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.	yes		yes	no
Secondary indexes	yes	restricted only exact value or prefix value scans	yes	yes
SQL Support of SQL	no	no	no Splunk Search Processing Language for search commands	no
APIs and other access methods	LDAP	C++ API Thrift	HTTP REST	.Net
Supported programming languages	All languages with LDAP bindings	C++ Java Perl PHP Python Ruby	C# Java JavaScript PHP Python Ruby	.Net
Server-side scripts Stored procedures	no	no	yes	no
Triggers	yes	no	yes	Callbacks are triggered when data changes
Partitioning methods Methods for storing different data on different nodes	Sharding cell division	Sharding	Sharding	Sharding
Replication methods Methods for redundantly storing data on multiple nodes	yes	selectable replication factor on file system level	Multi-source replication
MapReduce Offers an API for user-defined Map/Reduce methods		yes	yes	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency or Eventual Consistency depending on configuration	Immediate Consistency	Eventual Consistency	Immediate Consistency
Foreign keys Referential integrity	no	no	no	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	Atomic execution of specific operations	no	no A 'Transaction' in Splunk has a different meaning: grouping related events into a single one for later searching	ACID
Concurrency Support for concurrent manipulation of data	yes	yes	yes	yes
Durability Support for making data persistent	yes	yes	yes	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	yes		no	yes
User concepts Access control	LDAP bind authentication	no	Access rights for users and roles	Based on Windows Authentication
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More resources
	Atos Standard Common Repository	Hypertable	Splunk	VelocityDB
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