HAYASHI Kentaro
null+****@clear*****
Wed Sep 30 17:20:35 JST 2015
HAYASHI Kentaro 2015-09-30 17:20:35 +0900 (Wed, 30 Sep 2015) New Revision: 4b582024cae582e611f42345373a52cfd1aca880 https://github.com/groonga/groonga.org/commit/4b582024cae582e611f42345373a52cfd1aca880 Message: blog en: add 5.0.8 announce Added files: en/_posts/2015-09-29-release.md Added: en/_posts/2015-09-29-release.md (+83 -0) 100644 =================================================================== --- /dev/null +++ en/_posts/2015-09-29-release.md 2015-09-30 17:20:35 +0900 (15160bb) @@ -0,0 +1,83 @@ +--- +layout: post.en +title: Groonga 5.0.8 has been released +description: Groonga 5.0.8 has been released! +--- + +## Groonga 5.0.8 has been released + +[Groonga 5.0.8](/docs/news.html#release-5-0-8) has been released! + +How to install: [Install](/docs/install.html) + +### Changes + + * Important fix for the future releases + * Supported columns for temporary table + * Performance improvements + * Supported HTTP/2 by [groonga-httpd](/docs/reference/executables/groonga-httpd.html) + * Imcompatible changes + * Changed to normalize regular expression match target text before matching + +Note that this release has an incompatible change about regular expression handling. See following the section if you use regular expression in query and use capital letter for it. + +Please feel free to ask us on [mailing list](https://lists.sourceforge.net/lists/listinfo/groonga-talk) or [GitHub Issues](https://github.com/groonga/groonga/issues) if you have any questions. + +### Supported columns for temporary table + +In this release, columns for temporary table is supported. + +This feature is not practically used in Groonga yet, but it is significant for the future release of Groonga. + +There are some merit which may be introduced in the future release: + +* select command supports alias in the value of output_columns. It is similar to `AS alias_name` in SQL + +* select command supports sortby or drilldown by pre-filtered value dynamically + +For example, you can drilldown by pre-filtered value such as day of week instead of the value of `Time` column. + +This feature is also important for wrapper mode in [Mroonga](http://mroonga.org/) because it can support transaction correctly without breaking indexes by using temporary table when rollback is executed. + +### Supported HTTP/2 by [groonga-httpd](/docs/reference/executables/groonga-httpd.html) + +Groonga provides two HTTP server functionality. One is HTTP server implementation for Groonga by itself, The other is implemented as nginx module. The latter supported HTTP/2 now. + +In this release, the version of bundled nginx is updated to 1.9.5. As a result, [groonga-httpd](/docs/reference/executables/groonga-httpd.html) has supported HTTP/2 because groonga-httpd uses it internally. + +Change the configuration file such as groonga-httpd.conf to enable this feature: + +``` +http { + server { + # listen 10041; + listen 10041 http2; + + # ... + } +} +``` + +By this feature, reducing the amount of traffic and improving the throughput are expected. + +### Changed to normalize regular expression match target text before matching + +In this release, regular expression match target text is changed to normalize before matching. + +This change is introduced two point of views. + +* For consistency + +This change is introduced for consistency because other operators in Groonga normalize match target text before matching. It aims not to confuse Groonga user about such difference. + +* For performance + +By normalizing match target text before matching makes process of regular expression simple. + +If target text isn't normalized, you need to use complex regular expressions such as \A[Hh]ello and \A(?i)hello. Complex regular expressions can't be evaluated by index. If target text is normalized, you can use simple regular expressions. They may be evaluated by index. It's fast. + +### Conclusion + +See [Release 5.0.8 2015-09-29](/docs/news.html#release-5-0-8) about detailed changes since 5.0.7. + +Let's search by Groonga! -------------- next part -------------- HTML����������������������������...Download