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Posted to dev@couchdb.apache.org by Jan Lehnardt <ja...@apache.org> on 2018/08/08 08:09:58 UTC
[ANNOUNCE] Apache CouchDB 2.2.0 released
Dear community,
Apache CouchDB 2.2.0 has been released and is available for download.
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.
Download your copy here:
https://couchdb.apache.org/#download
Pre-built packages for Windows, macOS, Debian/Ubuntu and RHEL/CentOS are available. Docker images are in the publication process[1].
CouchDB 2.2.0 is a feature release, and was originally published on 2018-08-08.
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!
See the official release notes document for an exhaustive list of all changes:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
Release Notes highlights:
- New pluggable storage engine framework. This internal refactor makes it possible for CouchDB to use different backends for storing the base database file itself. The refactor included a full migration of the existing “legacy” storage engine into the new framework
- The minimum supported version of Erlang is now R17, not 16B03. Support for Erlang 21 is still ongoing and will be provided in a future release.
- The CouchDB replicator can now make use of the /_session endpoint rather than relying entirely on HTTP basic authentication headers. This can greatly improve replication performance.
- CouchDB no longer fails to complete replicating databases with large attachments. The fix for this issue included several related changes (GitHub issue 745[2] et.al.)
- Multiple queries can now be made at the POST /{db}/_all_docs/queries, POST /{db}/_design_docs/queries and POST /{db}/_local_docs/queries endpoints. Also, a new endpoint POST /{db}/_design/{ddoc}/_view/{view}/queries
- The least recently used (LRU) cache of databases is now only updated on database write, not read. This has lead to significant performance enhancements on very busy clusters.
- The revision stemming algorithm was optimized down from O(N^2) to O(N) via a depth-first search approach, and then further improved by calling the stemming operation only when necessary.
- CouchDB now checks for request authorization only once per each database request, improving the performance of any request that requires authorization.
- If a user specifies a value for use_index that is not valid for the selector (does not meet coverage requirements or proper sort fields), attempt to fall back to a valid index or full DB scan rather than returning a 400.
- CouchDB now includes a new builtin reduce function_approx_count_distinct, that uses a HyperLogLog algorithm to estimate the number of distinct keys in the view index. The precision is currently fixed to 2^11 observables, and therefore uses approximately 1.5KB of memory.
- Much improved documentation. Highlights include:
- A complete rewrite of the sharding documentation[3].
- Developer installation notes (INSTALL.*.rst)
- Much of the content of the original CouchDB Wiki has been imported into the official docs. (The old CouchDB Wiki is in the process of being deprecated.)
- Much improved Fauxton functionality. Highlights include:
- Search support in the code editor
- Support for relative Fauxton URLs (i.e., not always at /_utils)
- Replication setup enhancements for various authentication mechanisms
- Fixes for IE10, IE11, and Edge (we hope…)
- Resolving conflicts of design documents is now allowed
- Many more smaller bug fixes and performance improvements, as well as more features and refinements. See the release notes for a full list:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
On behalf of the CouchDB PMC,
Jan Lehnardt
—
[1]: https://github.com/docker-library/official-images/pull/4703
[2]: https://github.com/apache/couchdb/issues/745
[3]: http://docs.couchdb.org/en/2.2.0/cluster/sharding.html#cluster-sharding
Re: [ANNOUNCE] Apache CouchDB 2.2.0 released
Posted by Rene Veerman <se...@gmail.com>.
thanks to everyone who contributed in one way or another :)
i'm loving couchdb. never going back to SQL :D
On Thu, Aug 9, 2018 at 1:17 AM Joan Touzet <wo...@apache.org> wrote:
> Just a quick follow-up to say that the docker images are officially done:
>
> https://github.com/docker-library/official-images/pull/4703
>
> At this point, we believe the release work is complete.
>
> -Joan "release engineer hat: off" Touzet
>
> ----- Original Message -----
> From: "Jan Lehnardt" <ja...@apache.org>
> To: announce@apache.org, announce@couchdb.apache.org,
> user@couchdb.apache.org, "dev" <de...@couchdb.apache.org>, "marketing" <
> marketing@couchdb.apache.org>
> Sent: Wednesday, August 8, 2018 4:09:58 AM
> Subject: [ANNOUNCE] Apache CouchDB 2.2.0 released
>
> Dear community,
>
> Apache CouchDB 2.2.0 has been released and is available for download.
>
> 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.
>
> Download your copy here:
>
> https://couchdb.apache.org/#download
>
> Pre-built packages for Windows, macOS, Debian/Ubuntu and RHEL/CentOS are
> available. Docker images are in the publication process[1].
>
> CouchDB 2.2.0 is a feature release, and was originally published on
> 2018-08-08.
>
> 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!
>
> See the official release notes document for an exhaustive list of all
> changes:
>
> http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
>
> Release Notes highlights:
>
> - New pluggable storage engine framework. This internal refactor makes
> it possible for CouchDB to use different backends for storing the base
> database file itself. The refactor included a full migration of the
> existing “legacy” storage engine into the new framework
>
> - The minimum supported version of Erlang is now R17, not 16B03. Support
> for Erlang 21 is still ongoing and will be provided in a future release.
>
> - The CouchDB replicator can now make use of the /_session endpoint
> rather than relying entirely on HTTP basic authentication headers. This can
> greatly improve replication performance.
>
> - CouchDB no longer fails to complete replicating databases with large
> attachments. The fix for this issue included several related changes
> (GitHub issue 745[2] et.al.)
>
> - Multiple queries can now be made at the POST /{db}/_all_docs/queries,
> POST /{db}/_design_docs/queries and POST /{db}/_local_docs/queries
> endpoints. Also, a new endpoint POST
> /{db}/_design/{ddoc}/_view/{view}/queries
>
> - The least recently used (LRU) cache of databases is now only updated
> on database write, not read. This has lead to significant performance
> enhancements on very busy clusters.
>
> - The revision stemming algorithm was optimized down from O(N^2) to O(N)
> via a depth-first search approach, and then further improved by calling the
> stemming operation only when necessary.
>
> - CouchDB now checks for request authorization only once per each
> database request, improving the performance of any request that requires
> authorization.
>
> - If a user specifies a value for use_index that is not valid for the
> selector (does not meet coverage requirements or proper sort fields),
> attempt to fall back to a valid index or full DB scan rather than returning
> a 400.
>
> - CouchDB now includes a new builtin reduce
> function_approx_count_distinct, that uses a HyperLogLog algorithm to
> estimate the number of distinct keys in the view index. The precision is
> currently fixed to 2^11 observables, and therefore uses approximately 1.5KB
> of memory.
>
> - Much improved documentation. Highlights include:
> - A complete rewrite of the sharding documentation[3].
> - Developer installation notes (INSTALL.*.rst)
> - Much of the content of the original CouchDB Wiki has been imported
> into the official docs. (The old CouchDB Wiki is in the process of being
> deprecated.)
>
> - Much improved Fauxton functionality. Highlights include:
> - Search support in the code editor
> - Support for relative Fauxton URLs (i.e., not always at /_utils)
> - Replication setup enhancements for various authentication mechanisms
> - Fixes for IE10, IE11, and Edge (we hope…)
> - Resolving conflicts of design documents is now allowed
>
> - Many more smaller bug fixes and performance improvements, as well as
> more features and refinements. See the release notes for a full list:
>
> http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
>
> On behalf of the CouchDB PMC,
> Jan Lehnardt
> —
> [1]: https://github.com/docker-library/official-images/pull/4703
> [2]: https://github.com/apache/couchdb/issues/745
> [3]:
> http://docs.couchdb.org/en/2.2.0/cluster/sharding.html#cluster-sharding
>
>
>
Re: [ANNOUNCE] Apache CouchDB 2.2.0 released
Posted by Joan Touzet <wo...@apache.org>.
Just a quick follow-up to say that the docker images are officially done:
https://github.com/docker-library/official-images/pull/4703
At this point, we believe the release work is complete.
-Joan "release engineer hat: off" Touzet
----- Original Message -----
From: "Jan Lehnardt" <ja...@apache.org>
To: announce@apache.org, announce@couchdb.apache.org, user@couchdb.apache.org, "dev" <de...@couchdb.apache.org>, "marketing" <ma...@couchdb.apache.org>
Sent: Wednesday, August 8, 2018 4:09:58 AM
Subject: [ANNOUNCE] Apache CouchDB 2.2.0 released
Dear community,
Apache CouchDB 2.2.0 has been released and is available for download.
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.
Download your copy here:
https://couchdb.apache.org/#download
Pre-built packages for Windows, macOS, Debian/Ubuntu and RHEL/CentOS are available. Docker images are in the publication process[1].
CouchDB 2.2.0 is a feature release, and was originally published on 2018-08-08.
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!
See the official release notes document for an exhaustive list of all changes:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
Release Notes highlights:
- New pluggable storage engine framework. This internal refactor makes it possible for CouchDB to use different backends for storing the base database file itself. The refactor included a full migration of the existing “legacy” storage engine into the new framework
- The minimum supported version of Erlang is now R17, not 16B03. Support for Erlang 21 is still ongoing and will be provided in a future release.
- The CouchDB replicator can now make use of the /_session endpoint rather than relying entirely on HTTP basic authentication headers. This can greatly improve replication performance.
- CouchDB no longer fails to complete replicating databases with large attachments. The fix for this issue included several related changes (GitHub issue 745[2] et.al.)
- Multiple queries can now be made at the POST /{db}/_all_docs/queries, POST /{db}/_design_docs/queries and POST /{db}/_local_docs/queries endpoints. Also, a new endpoint POST /{db}/_design/{ddoc}/_view/{view}/queries
- The least recently used (LRU) cache of databases is now only updated on database write, not read. This has lead to significant performance enhancements on very busy clusters.
- The revision stemming algorithm was optimized down from O(N^2) to O(N) via a depth-first search approach, and then further improved by calling the stemming operation only when necessary.
- CouchDB now checks for request authorization only once per each database request, improving the performance of any request that requires authorization.
- If a user specifies a value for use_index that is not valid for the selector (does not meet coverage requirements or proper sort fields), attempt to fall back to a valid index or full DB scan rather than returning a 400.
- CouchDB now includes a new builtin reduce function_approx_count_distinct, that uses a HyperLogLog algorithm to estimate the number of distinct keys in the view index. The precision is currently fixed to 2^11 observables, and therefore uses approximately 1.5KB of memory.
- Much improved documentation. Highlights include:
- A complete rewrite of the sharding documentation[3].
- Developer installation notes (INSTALL.*.rst)
- Much of the content of the original CouchDB Wiki has been imported into the official docs. (The old CouchDB Wiki is in the process of being deprecated.)
- Much improved Fauxton functionality. Highlights include:
- Search support in the code editor
- Support for relative Fauxton URLs (i.e., not always at /_utils)
- Replication setup enhancements for various authentication mechanisms
- Fixes for IE10, IE11, and Edge (we hope…)
- Resolving conflicts of design documents is now allowed
- Many more smaller bug fixes and performance improvements, as well as more features and refinements. See the release notes for a full list:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
On behalf of the CouchDB PMC,
Jan Lehnardt
—
[1]: https://github.com/docker-library/official-images/pull/4703
[2]: https://github.com/apache/couchdb/issues/745
[3]: http://docs.couchdb.org/en/2.2.0/cluster/sharding.html#cluster-sharding
Re: [ANNOUNCE] Apache CouchDB 2.2.0 released
Posted by Joan Touzet <wo...@apache.org>.
Just a quick follow-up to say that the docker images are officially done:
https://github.com/docker-library/official-images/pull/4703
At this point, we believe the release work is complete.
-Joan "release engineer hat: off" Touzet
----- Original Message -----
From: "Jan Lehnardt" <ja...@apache.org>
To: announce@apache.org, announce@couchdb.apache.org, user@couchdb.apache.org, "dev" <de...@couchdb.apache.org>, "marketing" <ma...@couchdb.apache.org>
Sent: Wednesday, August 8, 2018 4:09:58 AM
Subject: [ANNOUNCE] Apache CouchDB 2.2.0 released
Dear community,
Apache CouchDB 2.2.0 has been released and is available for download.
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.
Download your copy here:
https://couchdb.apache.org/#download
Pre-built packages for Windows, macOS, Debian/Ubuntu and RHEL/CentOS are available. Docker images are in the publication process[1].
CouchDB 2.2.0 is a feature release, and was originally published on 2018-08-08.
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!
See the official release notes document for an exhaustive list of all changes:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
Release Notes highlights:
- New pluggable storage engine framework. This internal refactor makes it possible for CouchDB to use different backends for storing the base database file itself. The refactor included a full migration of the existing “legacy” storage engine into the new framework
- The minimum supported version of Erlang is now R17, not 16B03. Support for Erlang 21 is still ongoing and will be provided in a future release.
- The CouchDB replicator can now make use of the /_session endpoint rather than relying entirely on HTTP basic authentication headers. This can greatly improve replication performance.
- CouchDB no longer fails to complete replicating databases with large attachments. The fix for this issue included several related changes (GitHub issue 745[2] et.al.)
- Multiple queries can now be made at the POST /{db}/_all_docs/queries, POST /{db}/_design_docs/queries and POST /{db}/_local_docs/queries endpoints. Also, a new endpoint POST /{db}/_design/{ddoc}/_view/{view}/queries
- The least recently used (LRU) cache of databases is now only updated on database write, not read. This has lead to significant performance enhancements on very busy clusters.
- The revision stemming algorithm was optimized down from O(N^2) to O(N) via a depth-first search approach, and then further improved by calling the stemming operation only when necessary.
- CouchDB now checks for request authorization only once per each database request, improving the performance of any request that requires authorization.
- If a user specifies a value for use_index that is not valid for the selector (does not meet coverage requirements or proper sort fields), attempt to fall back to a valid index or full DB scan rather than returning a 400.
- CouchDB now includes a new builtin reduce function_approx_count_distinct, that uses a HyperLogLog algorithm to estimate the number of distinct keys in the view index. The precision is currently fixed to 2^11 observables, and therefore uses approximately 1.5KB of memory.
- Much improved documentation. Highlights include:
- A complete rewrite of the sharding documentation[3].
- Developer installation notes (INSTALL.*.rst)
- Much of the content of the original CouchDB Wiki has been imported into the official docs. (The old CouchDB Wiki is in the process of being deprecated.)
- Much improved Fauxton functionality. Highlights include:
- Search support in the code editor
- Support for relative Fauxton URLs (i.e., not always at /_utils)
- Replication setup enhancements for various authentication mechanisms
- Fixes for IE10, IE11, and Edge (we hope…)
- Resolving conflicts of design documents is now allowed
- Many more smaller bug fixes and performance improvements, as well as more features and refinements. See the release notes for a full list:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
On behalf of the CouchDB PMC,
Jan Lehnardt
—
[1]: https://github.com/docker-library/official-images/pull/4703
[2]: https://github.com/apache/couchdb/issues/745
[3]: http://docs.couchdb.org/en/2.2.0/cluster/sharding.html#cluster-sharding
Re: [ANNOUNCE] Apache CouchDB 2.2.0 released
Posted by Joan Touzet <wo...@apache.org>.
Just a quick follow-up to say that the docker images are officially done:
https://github.com/docker-library/official-images/pull/4703
At this point, we believe the release work is complete.
-Joan "release engineer hat: off" Touzet
----- Original Message -----
From: "Jan Lehnardt" <ja...@apache.org>
To: announce@apache.org, announce@couchdb.apache.org, user@couchdb.apache.org, "dev" <de...@couchdb.apache.org>, "marketing" <ma...@couchdb.apache.org>
Sent: Wednesday, August 8, 2018 4:09:58 AM
Subject: [ANNOUNCE] Apache CouchDB 2.2.0 released
Dear community,
Apache CouchDB 2.2.0 has been released and is available for download.
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.
Download your copy here:
https://couchdb.apache.org/#download
Pre-built packages for Windows, macOS, Debian/Ubuntu and RHEL/CentOS are available. Docker images are in the publication process[1].
CouchDB 2.2.0 is a feature release, and was originally published on 2018-08-08.
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!
See the official release notes document for an exhaustive list of all changes:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
Release Notes highlights:
- New pluggable storage engine framework. This internal refactor makes it possible for CouchDB to use different backends for storing the base database file itself. The refactor included a full migration of the existing “legacy” storage engine into the new framework
- The minimum supported version of Erlang is now R17, not 16B03. Support for Erlang 21 is still ongoing and will be provided in a future release.
- The CouchDB replicator can now make use of the /_session endpoint rather than relying entirely on HTTP basic authentication headers. This can greatly improve replication performance.
- CouchDB no longer fails to complete replicating databases with large attachments. The fix for this issue included several related changes (GitHub issue 745[2] et.al.)
- Multiple queries can now be made at the POST /{db}/_all_docs/queries, POST /{db}/_design_docs/queries and POST /{db}/_local_docs/queries endpoints. Also, a new endpoint POST /{db}/_design/{ddoc}/_view/{view}/queries
- The least recently used (LRU) cache of databases is now only updated on database write, not read. This has lead to significant performance enhancements on very busy clusters.
- The revision stemming algorithm was optimized down from O(N^2) to O(N) via a depth-first search approach, and then further improved by calling the stemming operation only when necessary.
- CouchDB now checks for request authorization only once per each database request, improving the performance of any request that requires authorization.
- If a user specifies a value for use_index that is not valid for the selector (does not meet coverage requirements or proper sort fields), attempt to fall back to a valid index or full DB scan rather than returning a 400.
- CouchDB now includes a new builtin reduce function_approx_count_distinct, that uses a HyperLogLog algorithm to estimate the number of distinct keys in the view index. The precision is currently fixed to 2^11 observables, and therefore uses approximately 1.5KB of memory.
- Much improved documentation. Highlights include:
- A complete rewrite of the sharding documentation[3].
- Developer installation notes (INSTALL.*.rst)
- Much of the content of the original CouchDB Wiki has been imported into the official docs. (The old CouchDB Wiki is in the process of being deprecated.)
- Much improved Fauxton functionality. Highlights include:
- Search support in the code editor
- Support for relative Fauxton URLs (i.e., not always at /_utils)
- Replication setup enhancements for various authentication mechanisms
- Fixes for IE10, IE11, and Edge (we hope…)
- Resolving conflicts of design documents is now allowed
- Many more smaller bug fixes and performance improvements, as well as more features and refinements. See the release notes for a full list:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
On behalf of the CouchDB PMC,
Jan Lehnardt
—
[1]: https://github.com/docker-library/official-images/pull/4703
[2]: https://github.com/apache/couchdb/issues/745
[3]: http://docs.couchdb.org/en/2.2.0/cluster/sharding.html#cluster-sharding
Re: [ANNOUNCE] Apache CouchDB 2.2.0 released
Posted by Joan Touzet <wo...@apache.org>.
Just a quick follow-up to say that the docker images are officially done:
https://github.com/docker-library/official-images/pull/4703
At this point, we believe the release work is complete.
-Joan "release engineer hat: off" Touzet
----- Original Message -----
From: "Jan Lehnardt" <ja...@apache.org>
To: announce@apache.org, announce@couchdb.apache.org, user@couchdb.apache.org, "dev" <de...@couchdb.apache.org>, "marketing" <ma...@couchdb.apache.org>
Sent: Wednesday, August 8, 2018 4:09:58 AM
Subject: [ANNOUNCE] Apache CouchDB 2.2.0 released
Dear community,
Apache CouchDB 2.2.0 has been released and is available for download.
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.
Download your copy here:
https://couchdb.apache.org/#download
Pre-built packages for Windows, macOS, Debian/Ubuntu and RHEL/CentOS are available. Docker images are in the publication process[1].
CouchDB 2.2.0 is a feature release, and was originally published on 2018-08-08.
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!
See the official release notes document for an exhaustive list of all changes:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
Release Notes highlights:
- New pluggable storage engine framework. This internal refactor makes it possible for CouchDB to use different backends for storing the base database file itself. The refactor included a full migration of the existing “legacy” storage engine into the new framework
- The minimum supported version of Erlang is now R17, not 16B03. Support for Erlang 21 is still ongoing and will be provided in a future release.
- The CouchDB replicator can now make use of the /_session endpoint rather than relying entirely on HTTP basic authentication headers. This can greatly improve replication performance.
- CouchDB no longer fails to complete replicating databases with large attachments. The fix for this issue included several related changes (GitHub issue 745[2] et.al.)
- Multiple queries can now be made at the POST /{db}/_all_docs/queries, POST /{db}/_design_docs/queries and POST /{db}/_local_docs/queries endpoints. Also, a new endpoint POST /{db}/_design/{ddoc}/_view/{view}/queries
- The least recently used (LRU) cache of databases is now only updated on database write, not read. This has lead to significant performance enhancements on very busy clusters.
- The revision stemming algorithm was optimized down from O(N^2) to O(N) via a depth-first search approach, and then further improved by calling the stemming operation only when necessary.
- CouchDB now checks for request authorization only once per each database request, improving the performance of any request that requires authorization.
- If a user specifies a value for use_index that is not valid for the selector (does not meet coverage requirements or proper sort fields), attempt to fall back to a valid index or full DB scan rather than returning a 400.
- CouchDB now includes a new builtin reduce function_approx_count_distinct, that uses a HyperLogLog algorithm to estimate the number of distinct keys in the view index. The precision is currently fixed to 2^11 observables, and therefore uses approximately 1.5KB of memory.
- Much improved documentation. Highlights include:
- A complete rewrite of the sharding documentation[3].
- Developer installation notes (INSTALL.*.rst)
- Much of the content of the original CouchDB Wiki has been imported into the official docs. (The old CouchDB Wiki is in the process of being deprecated.)
- Much improved Fauxton functionality. Highlights include:
- Search support in the code editor
- Support for relative Fauxton URLs (i.e., not always at /_utils)
- Replication setup enhancements for various authentication mechanisms
- Fixes for IE10, IE11, and Edge (we hope…)
- Resolving conflicts of design documents is now allowed
- Many more smaller bug fixes and performance improvements, as well as more features and refinements. See the release notes for a full list:
http://docs.couchdb.org/en/2.2.0/whatsnew/2.2.html
On behalf of the CouchDB PMC,
Jan Lehnardt
—
[1]: https://github.com/docker-library/official-images/pull/4703
[2]: https://github.com/apache/couchdb/issues/745
[3]: http://docs.couchdb.org/en/2.2.0/cluster/sharding.html#cluster-sharding