DBMS > Hawkular Metrics vs. NSDb vs. Valentina Server
System Properties Comparison Hawkular Metrics vs. NSDb vs. Valentina Server
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|Editorial information provided by DB-Engines|
|Name||Hawkular Metrics Xexclude from comparison||NSDb Xexclude from comparison||Valentina Server Xexclude from comparison|
|Description||Hawkular metrics is the metric storage of the Red Hat sponsored Hawkular monitoring system. It is based on Cassandra.||Scalable, High-performance Time Series DBMS designed for Real-time Analytics on top of Kubernetes||Object-relational database and reports server|
|Primary database model||Time Series DBMS||Time Series DBMS||Relational DBMS|
|Developer||Community supported by Red Hat||Paradigma Software|
|License Commercial or Open Source||Open Source Apache 2.0||Open Source Apache Version 2.0||commercial|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Implementation language||Java||Java, Scala|
|Server operating systems||Linux|
|Typing predefined data types such as float or date||yes||yes: int, bigint, decimal, string||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|
|Secondary indexes||no||all fields are automatically indexed||yes|
|SQL Support of SQL||no||SQL-like query language||yes|
|APIs and other access methods||HTTP REST||gRPC|
|Supported programming languages||Go|
|Server-side scripts Stored procedures||no||no||yes|
|Triggers||yes via Hawkular Alerting||yes|
|Partitioning methods Methods for storing different data on different nodes||Sharding based on Cassandra||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||selectable replication factor based on Cassandra|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency based on Cassandra|
Immediate Consistency based on Cassandra
|Foreign keys Referential integrity||no||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||no|
|Concurrency Support for concurrent manipulation of data||yes||yes|
|Durability Support for making data persistent||yes||Using Apache Lucene||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||yes|
|User concepts Access control||no||fine grained access rights according to SQL-standard|
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|Hawkular Metrics||NSDb||Valentina Server|
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