The Apache Software Foundation (ASF) has announced Apache CouchDB 1.6 is now available for download.

CouchDB is Apache’s web database that supports JSON documents, HTTP access, JavaScript queries and MapReduce Indexes.

Features of CouchDB include on-the-fly document transformation and real-time change notifications. CouchDB is highly available and partition tolerant, but is also eventually consistent.

The CouchDB document update model is lockless and optimistic. Document edits are made by client applications loading documents, applying changes, and saving them back to the database. If another client editing the same document saves their changes first, the client gets an edit conflict error on save. To resolve the update conflict, the latest document version can be opened, the edits reapplied and the update tried again.

CouchDB 1.6.0 is a feature release where the most obvious change is to the experimental new web user interface (Fauxton). Fauxton is planned replacement for Futon, CouchDB's Web-based administration console. It takes a more modular approach than Futon. Among the improvements in this release are switching the code editor from CodeMirror to Ace as well as better support for various browsers.

CouchDB also adds support for Erlang/OTP 17. There have been changes to improve replication speed for large documents and attachments, and to improve performance of multipart/related requests. Replication can now be performed without having write access to the source database, and the replication checkpoint interval can now be configured. A list of the main changes can be found on the CouchDB blog.

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