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Apache Accumulo

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Claimed by Apache Software Foundation Analyzed 1 day ago

Apache Accumulo is a sorted, distributed key/value store based on Google's BigTable design. It is built on top of Apache Hadoop, Zookeeper, and Thrift. It features a few novel improvements on the BigTable design in the form of cell-level access labels and a server-side programming mechanism that can ... [More] modify key/value pairs at various points in the data management process. [Less]

450K lines of code

34 current contributors

7 days since last commit

24 users on Open Hub

High Activity
0.0
 
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OrientDB

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  Analyzed about 7 hours ago

OrientDB is a deeply scalable Document-Graph DBMS with the flexibility of the Document databases and the power to manage links of the Graph databases. It can work in schema-less mode, schema-full or a mix of both. Supports advanced features such as ACID Transactions, Fast Indexes, Native and SQL ... [More] queries. It imports and exports documents in JSON. Graphs of hundreads of linked documents can be retrieved all in memory in few milliseconds without executing costly JOIN such as the Relational DBMSs do. OrientDB uses a new indexing algorithm called MVRB-Tree, derived from the Red-Black Tree and from the B+Tree with benefits of both: fast insertion and ultra fast lookup. [Less]

625K lines of code

0 current contributors

7 days since last commit

23 users on Open Hub

Moderate Activity
5.0
 
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sqlalchemy-migrate

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  Analyzed 2 days ago

Schema migration tools for SQLAlchemy, designed to support an agile approach to database design, and make it easier to keep development and production databases in sync, as schema changes are required.

0 lines of code

7 current contributors

almost 3 years since last commit

22 users on Open Hub

Activity Not Available
3.5
   
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Mostly written in language not available
Licenses: mit

OntoWiki

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  Analyzed 3 months ago

OntoWiki is a Semantic Data Wiki as well as an Application Framework providing support for agile, distributed knowledge engineering scenarios.

168K lines of code

0 current contributors

almost 3 years since last commit

21 users on Open Hub

Activity Not Available
4.28571
   
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Neo4j - the graph database

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  Analyzed over 2 years ago

Neo4j is a graph database. It is an embedded, disk-based, fully transactional Java persistence engine that stores data structured in graphs rather than in tables. A graph (mathematical lingo for a network) is a flexible data structure that allows a more agile and rapid style of development.

881K lines of code

1 current contributors

over 3 years since last commit

21 users on Open Hub

Activity Not Available
4.71429
   
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Licenses: AGPL3, gpl3_or_l...

MusicBrainz Server

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Claimed by MetaBrainz Foundation Analyzed about 13 hours ago

MusicBrainz is a community maintained open source encyclopedia of music information.

313K lines of code

17 current contributors

6 days since last commit

20 users on Open Hub

High Activity
4.44444
   
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OpenLink Virtuoso (Open-Source Edition)

  Analyzed 3 months ago

Virtuoso is a scalable cross-platform server that combines Relational, Graph, and Document Data Management with Web Application Server and Web Services Platform functionality.

2.42M lines of code

9 current contributors

3 months since last commit

20 users on Open Hub

Activity Not Available
4.81818
   
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rasdaman

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Claimed by rasdaman Analyzed 3 months ago

rasdaman is the pioneer Array DBMS enabling Big Data Analytics on massive n-D arrays ("datacubes") such as spatio-temporal sensor, image, simulation, and statistics data. Its declarative query language extends SQL with high-level array operators. Frontends supported include python, R, GDAL, QGIS ... [More] , OpenLayers, NASA WorldWind, and many more. Client-side parts are LGPL for free use of rasdaman in open and closed applications; the server itself (a separate process) is GPL implementing the paradigm of "life is a give and take". rasdaman has been released into OS by rasdaman GmbH and is now co-led by Jacobs U, the makers of several Big Data standards: ISO Array SQL, OGC WCS and WCPS; rasdaman is official OGC and INSPIRE WCS Reference Implementation and part of OSGeo Live (live.osgeo.org). [Less]

597K lines of code

11 current contributors

4 months since last commit

20 users on Open Hub

Activity Not Available
5.0
 
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Apache OpenJPA

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Claimed by Apache Software Foundation Analyzed about 5 hours ago

A Java EE persistence project. It aims to be a feature-rich implementation of the persistence part of Java Community Process JSR-220 (Enterprise JavaBeans 3.0), which is known as the Java Persistence API (JPA). OpenJPA can be used as a stand-alone POJO persistence layer, or it can be integrated into ... [More] any EJB3.0 compliant container and many lightweight frameworks. [Less]

544K lines of code

0 current contributors

5 months since last commit

20 users on Open Hub

Very Low Activity
4.0
   
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Cayenne

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Claimed by Apache Software Foundation Analyzed about 8 hours ago

Apache Cayenne is an open source persistence framework licensed under the Apache License, providing object-relational mapping (ORM) and remoting services. With a wealth of unique and powerful features, Cayenne can address a wide range of persistence needs. Cayenne seamlessly binds one or more ... [More] database schemas directly to Java objects, managing atomic commit and rollbacks, SQL generation, joins, sequences, and more. With Cayenne's Remote Object Persistence, those Java objects can even be persisted out to clients via Web Services. Or, with native XML serialization, objects can be even further persisted to non-Java clients - such as an Ajax-capable browser. [Less]

288K lines of code

7 current contributors

about 12 hours since last commit

19 users on Open Hub

Moderate Activity
5.0
 
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