"Fossies" - the Fresh Open Source Software Archive  

Source code changes of the file "solr/solr-ref-guide/src/major-changes-in-solr-8.adoc" between
solr-8.4.0-src.tgz and solr-8.4.1-src.tgz

About: Solr is the search platform from the Apache Lucene project. Its major features include full-text search, hit highlighting, faceted search, caching, replication, and a web admin interface.

major-changes-in-solr-8.adoc  (solr-8.4.0-src.tgz):major-changes-in-solr-8.adoc  (solr-8.4.1-src.tgz)
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// KIND, either express or implied. See the License for the // KIND, either express or implied. See the License for the
// specific language governing permissions and limitations // specific language governing permissions and limitations
// under the License. // under the License.
Solr 8.0 is a major new release of Solr. Solr 8.0 is a major new release of Solr.
This page highlights the biggest changes, including new features you may want to be aware of, and changes in default behavior and deprecated features that have been removed. This page highlights the biggest changes, including new features you may want to be aware of, and changes in default behavior and deprecated features that have been removed.
== Solr 8 Upgrade Planning == Solr 8 Upgrade Planning
Before staring an upgrade to Solr 8, please take the time to review all informat ion about changes from the version you are currently on up to Solr 8. Before starting an upgrade to Solr 8, please take the time to review all informa tion about changes from the version you are currently on up to Solr 8.
You should also consider all changes that have been made to Solr in any version you have not upgraded to already. For example, if you are currently using Solr 7 .4, you should review changes made in all subsequent 7.x releases in addition to changes for 8.0. You should also consider all changes that have been made to Solr in any version you have not upgraded to already. For example, if you are currently using Solr 7 .4, you should review changes made in all subsequent 7.x releases in addition to changes for 8.0.
A thorough review of the list in <<Major Changes in Earlier 7.x Versions>>, belo w, as well as the {solr-javadocs}/changes/Changes.html[CHANGES.txt] in your Solr instance will help you plan your migration to Solr 8. A thorough review of the list in <<Major Changes in Earlier 7.x Versions>>, belo w, as well as the {solr-javadocs}/changes/Changes.html[CHANGES.txt] in your Solr instance will help you plan your migration to Solr 8.
=== Upgrade Prerequisites === Upgrade Prerequisites
*If using SolrCloud, you must be on Solr 7.3.0 or higher*. Solr's LeaderInRecove ry (LIR) functionality <<Solr 7.3,changed significantly>> in Solr 7.3. While the se changes were back-compatible for all subsequent 7.x releases, that compatibil ity has been removed in 8.0. *If using SolrCloud, you must be on Solr 7.3.0 or higher*. Solr's LeaderInRecove ry (LIR) functionality <<Solr 7.3,changed significantly>> in Solr 7.3. While the se changes were back-compatible for all subsequent 7.x releases, that compatibil ity has been removed in 8.0.
In order to upgrade to Solr 8.x, all nodes of your cluster must be running Solr 7.3 or higher. If an upgrade is attempted with nodes running versions earlier th an 7.3, documents could be lost. In order to upgrade to Solr 8.x, all nodes of your cluster must be running Solr 7.3 or higher. If an upgrade is attempted with nodes running versions earlier th an 7.3, documents could be lost.
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