Dear community,
Apache CouchDB® 3.5.0 has been released and is available for download.
CouchDB 3.5.0 is a feature release, and was originally published on 2025-05-06.
https://couchdb.apache.org/#download
Pre-built packages for Windows, macOS, Debian/Ubuntu and RHEL/CentOS, as well
as Docker images are available.
Release Notes highlights:
- Support for truly parallel reads independent from writes. Enabled by
default, can result in 10%-40% more throughput with highly concurrent workloads.
- The config option `upgrade_hash_on_auth` and the use of xxHash have now
been enabled by default. You can safely up-and-downgrade from CouchDB versions
3.4.x to 3.5.0. With these features enabled by default, you cannot upgrade and
then revert from earlier versions of CouchDB. If you need to be able to
downgrade, upgrade to CouchDB 3.4.x before upgrading to 3.5.0.
- Introducing a conflict finger plugin to the scanner module. You can now
scan your databases for conflicts in the background and have results reported
in CouchDB logs for cleanup.
- This release adds four new built-in reducers: `_top_N`, `_bottom_N`,
`_first` and `_last` obviating the need to implement these yourself.
- Official binary packages are now shipping with Erlang 26, resulting in
better JIT performance across the board.
See the official release notes document for an exhaustive list of all changes:
http://docs.couchdb.org/en/stable/whatsnew/3.5.html
Apache CouchDB® lets you access your data where you need it. The Couch
Replication Protocol is implemented in a variety of projects and products that
span every imaginable computing environment from globally distributed
server-clusters, over mobile phones to web browsers.
Store your data safely, on your own servers, or with any leading cloud
provider. Your web- and native applications love CouchDB, because it speaks
JSON natively and supports binary data for all your data storage needs.
The Couch Replication Protocol lets your data flow seamlessly between server
clusters to mobile phones and web browsers, enabling a compelling offline-first
user-experience while maintaining high performance and strong reliability.
CouchDB comes with a developer-friendly query language, and optionally
MapReduce for simple, efficient, and comprehensive data retrieval.
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!
On behalf of the CouchDB PMC,
Jan Lehnardt
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