DBMS > FatDB vs. Hawkular Metrics vs. Quasardb vs. SAP Advantage Database Server

System Properties Comparison FatDB vs. Hawkular Metrics vs. Quasardb vs. SAP Advantage Database Server

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Editorial information provided by DB-Engines
Name	FatDB  Xexclude from comparison	Hawkular Metrics  Xexclude from comparison	Quasardb  Xexclude from comparison	SAP Advantage Database Server former name: Sybase ADS  Xexclude from comparison
	FatDB/FatCloud has ceased operations as a company with February 2014. FatDB is discontinued and excluded from the ranking.			SAP Advantage Database Server seems to be discontinued. Therefore it is excluded from the DB-Engines Ranking.
Description	A .NET NoSQL DBMS that can integrate with and extend SQL Server.	Hawkular metrics is the metric storage of the Red Hat sponsored Hawkular monitoring system. It is based on Cassandra.	Distributed, high-performance timeseries database	Low-cost RDBMS with access to ISAM and FoxPro data structures
Primary database model	Document store Key-value store	Time Series DBMS	Time Series DBMS	Relational DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart		Score 0.08 Rank #366   Overall #39   Time Series DBMS	Score 0.21 Rank #322   Overall #29   Time Series DBMS
Website		www.hawkular.org	quasar.ai	www.sap.com/products/advantage-database-server.html
Technical documentation		www.hawkular.org/­hawkular-metrics/­docs/­user-guide	doc.quasar.ai/­master
Developer	FatCloud	Community supported by Red Hat	quasardb	Sybase, SAP
Initial release	2012	2014	2009	1993
Current release			3.14.1, January 2024
License Commercial or Open Source	commercial	Open Source Apache 2.0	commercial Free community edition, Non-profit organizations and non-commercial usage are eligible for free licenses	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	C#	Java	C++
Server operating systems	Windows	Linux OS X Windows	BSD Linux OS X Windows	Linux Windows
Data scheme	schema-free	schema-free	schema-free	yes
Typing predefined data types such as float or date	yes	yes	yes integer and binary	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	no	no
Secondary indexes	yes	no	yes with tags	yes
SQL Support of SQL	no Via inetgration in SQL Server	no	SQL-like query language	yes
APIs and other access methods	.NET Client API LINQ RESTful HTTP API RPC Windows WCF Bindings	HTTP REST	HTTP API	.NET Client API ADO.NET JDBC ODBC OLE DB
Supported programming languages	C#	Go Java Python Ruby	.Net C C# C++ Go Java JavaScript (Node.js) PHP Python R	Delphi Perl PHP
Server-side scripts Stored procedures	yes via applications	no	no	yes
Triggers	yes via applications	yes via Hawkular Alerting	no	yes
Partitioning methods Methods for storing different data on different nodes	Sharding	Sharding based on Cassandra	Sharding consistent hashing	none
Replication methods Methods for redundantly storing data on multiple nodes	selectable replication factor	selectable replication factor based on Cassandra	Source-replica replication with selectable replication factor	Multi-source replication CONFLICT Trigger to resolve replication conflicts Source-replica replication
MapReduce Offers an API for user-defined Map/Reduce methods	yes	no	with Hadoop integration	no
Consistency concepts Methods to ensure consistency in a distributed system	Eventual Consistency Immediate Consistency	Eventual Consistency based on Cassandra Immediate Consistency based on Cassandra	Immediate Consistency	Immediate Consistency
Foreign keys Referential integrity	no	no	no	yes
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	no	no	ACID	ACID
Concurrency Support for concurrent manipulation of data	yes	yes	yes	yes
Durability Support for making data persistent	yes	yes	yes by using LevelDB	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.		no	yes Transient mode	no caching of (temporary) tables can be configured
User concepts Access control	no Can implement custom security layer via applications	no	Cryptographically strong user authentication and audit trail	fine grained access rights according to SQL-standard
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More resources
	FatDB	Hawkular Metrics	Quasardb	SAP Advantage Database Server former name: Sybase ADS
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