Apache CouchDB 是一个面向文档的数据库管理系统。它提供以 JSON 作为数据格式的 REST 接口来对其进行操作，并可以通过视图来操纵文档的组织和呈现。 CouchDB 是 Apache 基金会的顶级开源项目。
该版本改进内容包括：
* Mask passwords in active tasks and logging.
* Update mochijson2 to allow output of BigNums not in float form.
* Added support for X-HTTP-METHOD-OVERRIDE.
* Disable jsonp by default.
* Accept gzip encoded standalone attachments.
* Made max_concurrent_connections configurable.
* Added continuous replication option to Futon.
* Added option to replicating test results anonymously to a community CouchDB instance.
* Allow creation and deletion of config entries in Futon.
* Fixed various UI issues in Futon.
* Fixed compatibility with the Erlang R14 series.
* Fixed warnings on Linux builds.
* Fixed build error when aclocal needs to be called during the build.
* Require ICU 4.3.1.
* Fixed compatibility with Solaris.
* Added authentication redirect URL to log in clients.
* Added authentication caching, to avoid repeated opening and closing of the users database for each request requiring authentication.
* Made authentication timeout configurable.
* Temporary views are now admin-only resources.
* Don't require a revpos for attachment stubs.
* Make file deletions async to avoid pauses during compaction and db deletion.
* Fixed for wrong offset when writing headers and converting them to blocks, only triggered when header is larger than 4k.
* Preserve _revs_limit and instance_start_time after compaction.
* Fixed timeout with large .ini files.
* Added tests for couch.js and jquery.couch.js
* Added various API features to jquery.couch.js
* Faster default view collation.
* Upgrade CommonJS modules support to 1.1.1.
* Added option to include update_seq in view responses.
* Fixed erlang filter funs and normalize filter fun API.
* Fixed hang in view shutdown.
* Refactored various internal APIs related to attachment streaming.
* Fixed hanging replication.
* Fixed keepalive issue.
* Allow global rewrites so system defaults are available in vhosts.
* Allow isolation of databases with vhosts.
* Made the test suite overall more reliable.
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