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From Jan Lehnardt <...@apache.org>
Subject Re: [Release] CouchDB 2.0
Date Tue, 20 Sep 2016 09:11:07 GMT

> On 20 Sep 2016, at 11:05, Jan Lehnardt <jan@apache.org> wrote:
> 
> The Apache CouchDB development community is proud to announce the immediate availability
of version 2.0.
> 
> See also the official Apache Press Release: https://blogs.apache.org/foundation/entry/the_apache_software_foundation_announces99
> 
> CouchDB 2.0 is 99% API compatible (http://docs.couchdb.org/en/master/whatsnew/2.0.html#upgrade-notes)
with the 1.x series and most applications should continue to just work.
> 
> # Cluster
> 
> CouchDB 2.0’s prime new feature is naive

*native, of course. *sweat*

> support for clustering. It is based on the Dynamo paper (http://www.allthingsdistributed.com/2007/10/amazons_dynamo.html)
and the work done at Cloudant and IBM in the BigCouch project which is now fully merged into
Apache CouchDB project.
> 
> In short, clustering means that you can take a set of computers or virtual machines in
the same data center and make them behave like a single, unified CouchDB instance. This has
three benefits:
> 
> 1. fault tolerance: data is stored on more than one computer. A CouchDB 2.0 cluster obviates
the need for custom setup of failover CouchDB instances.
> 
> 2. performance: data is split up and only a part lives on each node in a  cluster. That
means each node only has a fraction of the work to do (like computing a view index) than a
single node instance would have.
> 
> 3. capacity: with setups of multiple computers storing data, and with data being split
among nodes, it is now possible to store amounts of data in CouchDB that exceed the capacity
of a single computer many many times, setting CouchDB up for genuine Big Data solutions.
> 
> You have full control over all parameters of the cluster to suit every project’s needs.
> Note: CouchDB 2.0 can also be configured as a “single node”-cluster, if none of the
above benefits are relevant to you.
> 
> See the CouchDB 2.0 Architecture blog post (https://blog.couchdb.org/2016/08/01/couchdb-2-0-architecture/)
for more information about the clustering technology.
> 
> # Easy Queries
> 
> The second major feature is the declarative query language “Mango”. Mango is easier
to use and faster in operation than the existing JavaScript-based Views. Of course, JavaScript
Views continue to work.
> 
> See the Mango Query blog post (https://blog.couchdb.org/2016/08/03/feature-mango-query/)
for more information about Mango.
> 
> # New Admin Interface
> 
> CouchDB 2.0 comes with a completely rewritten administration interface (nickname “Fauxton”),
built in React.js. It sports a modern look, advanced features and a code-base that is easy
to contribute to.
> 
> See Fauxton, the new CouchDB Dashboard for more info.
> 
> # Performance
> 
> Both the replicator and compactor have undergone significant performance improvements
that will speed up replication between CouchDB instances as well as PouchDB (https://pouchdb.com/)
and Couchbase Lite instances.
> 
> Compaction can now be run at any time, even continuously, with an i/o-queueing system
ensuring that live requests are not slowed down while compaction is running.
> 
> In addition: the compaction process is shorter, uses less CPU and RAM, produces smaller
database files and freshly compacted databases are significantly faster to read from.
> 
> See Feature: Replication (https://blog.couchdb.org/2016/08/15/) and Feature: Compaction
(https://blog.couchdb.org/2016/08/10/) for more info.
> 
> # New Logo
> 
> CouchDB 2.0 comes with a brand new Logo, designed by Constantin Angheloui. The website,
docs and other materials have been updated. See the CouchDB 2.0 branding guide for details:
https://github.com/apache/couchdb-www/blob/asf-site/CouchDB-visual-identity/CouchDB-brand-book.pdf
> 
> # More Details
> 
> For more details, please refer to our 2.0 blog post series: https://blog.couchdb.org/2016/08/23/check-out-the-road-to-couchdb-2-0-series/
> 
> # Download
> 
> Apache CouchDB 2.0 downloads are available from the official website: http://couchdb.apache.org/#download.
> 
> # Acknowledgements
> 
> The community would like to thank all contributors for their part in making this release,
from the smallest bug report or patch to major contributions in code, design, or marketing,
we couldn’t have done it without you!
> 

-- 
Professional Support for Apache CouchDB:
https://neighbourhood.ie/couchdb-support/


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