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Subject [GitHub] gerlowskija commented on a change in pull request #594: SOLR-13259: Add new section on Reindexing in Solr
Date Fri, 01 Mar 2019 15:08:37 GMT
gerlowskija commented on a change in pull request #594: SOLR-13259: Add new section on Reindexing
in Solr
URL: https://github.com/apache/lucene-solr/pull/594#discussion_r261632572
 
 

 ##########
 File path: solr/solr-ref-guide/src/reindexing.adoc
 ##########
 @@ -0,0 +1,180 @@
+= Reindexing
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+There are several types of changes to Solr configuration that require you to reindex your
data.
+
+These changes include editing properties of fields or field types; adding fields, field types,
or copy field rules;
+upgrading Solr; and some system configuration properties.
+
+It's important to be aware that many changes require reindexing, because there are times
when not reindexing
+can have negative consequences for Solr as a system, or for the ability of your users to
find what they are looking for.
+
+There is no process in Solr for programmatically reindexing data. When we say "reindex",
we mean, literally,
+"index it again". However you got the data into the index the first time, you will run that
process again.
 
 Review comment:
   [0] It's implied in everything you have here, but I would make the point a little more
explicit if you added a sentence at the end of this paragraph like:
   
   "It is strongly recommended that Solr users index their data in a repeatable, consistent
way, so that the process can be easily repeated if the need for indexing arises"

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