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MapDB: database engine

MapDB combines embedded database engine and Java collections. It is free under Apache 2 license. MapDB is fplexible and can be used in many roles:

• Drop-in replacement for Maps, Lists, Queues and other collections.
• Off-heap collections not affected by Garbage Collector
• Multilevel cache with expiration and disk overflow.

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                             Apache License
                       Version 2.0, January 2004
                    http://www.apache.org/licenses/

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

1. Definitions.

"License" shall mean the terms and conditions for use, reproduction,

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Contributing

We welcome bug fixes and patches from 3rd party contributors. Please see the Contributor Agreement for details.

Please follow these guidelines if you want to contribute to ArangoDB:

Reporting Bugs

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devel

• added a memory expection of V8 memory gets to low

• fixed epoch computation in hybrid logical clock

• fixed thread affinity

• replaced require("internal").db by require("@arangodb").db

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ArangoDB

ArangoDB is a multi-model, open-source database with flexible data models for documents, graphs, and key-values. Build high performance applications using a convenient SQL-like query language or JavaScript extensions. Use ACID transactions if you require them. Scale horizontally with a few mouse clicks.

The supported data models can be mixed in queries and allow ArangoDB to be the aggregation point for your data.

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This document contains the last changes of OrientDB Community Edition.

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VERSION 2.2.5 - (Jul, 7 2016)

• Core (12): https://github.com/orientechnologies/orientdb/issues?q=milestone%3A2.2.5+is%3Aclosed

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VERSION 2.2.4 - (Jul, 7 2016)

• Core (26): https://github.com/orientechnologies/orientdb/issues?q=milestone%3A2.2.4+is%3Aclosed

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3RDY PARTY LIBRARIES

3rd party libraries used by OrientDB, compatible with Apache license:

• Javamail: CDDL license (http://www.oracle.com/technetwork/java/faq-135477.html)
• java persistence 2.0: CDDL license
• JNA: Apache 2 (https://github.com/twall/jna/blob/master/LICENSE)
• Hibernate JPA 2.0 API: Eclipse Distribution License 1.0
• ASM: OW2

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OrientDB

What is OrientDB?

OrientDB is an Open Source NoSQL DBMS with the features of both Document and Graph DBMSs. It's written in Java and it's amazingly fast: it can store 220,000 records per second on common hardware. Even for a Document based database the relationships are managed as in Graph Databases with direct connections among records. You can traverse parts of or entire trees and graphs of records in a few milliseconds. Supports schema-less, schema-full and schema-mixed modes. Has a strong security profiling system based on user and roles and supports SQL amongst the query languages. Thanks to the SQL layer it's straightforward to use for people skilled in the Relational world.

Get started with OrientDB.

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                             Apache License
                       Version 2.0, January 2004
                    http://www.apache.org/licenses/

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

1. Definitions.

"License" shall mean the terms and conditions for use, reproduction,

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Riak 2.1.0 Release Notes

New Features

Performance Improvements

The introduction of Write Once Buckets allows users to experience up to a 2x performance improvement for write-heavy write-once workloads. More details on implementing Write Once Buckets are available below.

Write Once Bucket Type