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Subject svn commit: r1044552 - in /websites/staging/lucene/trunk/content: ./ solr/news.html
Date Sun, 05 May 2019 03:21:57 GMT
Author: buildbot
Date: Sun May  5 03:21:57 2019
New Revision: 1044552

Staging update by buildbot for lucene

    websites/staging/lucene/trunk/content/   (props changed)

Propchange: websites/staging/lucene/trunk/content/
--- cms:source-revision (original)
+++ cms:source-revision Sun May  5 03:21:57 2019
@@ -1 +1 @@

Modified: websites/staging/lucene/trunk/content/solr/news.html
--- websites/staging/lucene/trunk/content/solr/news.html (original)
+++ websites/staging/lucene/trunk/content/solr/news.html Sun May  5 03:21:57 2019
@@ -228,7 +228,21 @@ many of the world's largest internet sit
 <p><a href=""></a></p>
 <h3 id="solr-800-release-highlights">Solr 8.0.0 Release Highlights<a class="headerlink"
href="#solr-800-release-highlights" title="Permanent link">&para;</a></h3>
-<li>Solr now uses HTTP/2 for inter-node communication</li>
+<p>Solr now uses HTTP/2 for inter-node communication to attain greater efficiency.<br
+Details:  Solr is switching from Apache HttpClient to Jetty Client for adding HTTP/2 support.
+Most frequent inter-communication between nodes like indexing and query are now sent in HTTP/2.
+HTTP/1.1 practically allows only one outstanding request per TCP connection this means that
for sending multiple requests at the same time multiple TCP connections must be established.
+This leads to waste of resources on both-sides and long GC-pause.
+Solr 8 with HTTP/2 support overcomes that problem by allowing multiple requests can be sent
in parallel using a same TCP connection.</p>
+<p>Nested documents (AKA child documents or block join) is significantly improved.
+Most improvements come from storing and leveraging more information about the relationships
in the index, like the named relationship between a child and its parent.
+This information is used by the [child] doc transformer to return children in nested form
instead of flat.
+There is plenty more that can be done with this in the future.
+Another key improvement is that nested documents can be deleted or replaced in a natural
way without orphaning child documents; although care is still needed with delete-by-query.</p>
 <p>Being a major release, Solr 8 removes many deprecated APIs, changes various parameter
defaults and behavior. Some changes may require a re-index of your content.
 You are thus encouraged to thoroughly read the "Upgrade Notes" at:</p>

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