From fe6debb2a54a15310a0936b24ff1ad2c9ead6256 Mon Sep 17 00:00:00 2001 From: Ryan McKinley Date: Thu, 27 Mar 2008 00:31:21 +0000 Subject: [PATCH] adding master/slave upgrade notice git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@641660 13f79535-47bb-0310-9956-ffa450edef68 --- CHANGES.txt | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/CHANGES.txt b/CHANGES.txt index 5704a49a7c8..1107ec2ec6e 100644 --- a/CHANGES.txt +++ b/CHANGES.txt @@ -25,12 +25,19 @@ $Id$ Upgrading from Solr 1.2 ----------------------- +IMPORTANT UPGRADE NOTE: In a master/slave configuration, all searchers/slaves +should be upgraded before the master! If the master were to be updated +first, the older searchers would not be able to read the new index format. -Solr 1.3 includes a newer version of Lucene (2.3.1). The new index -format is not readable by older versions of Lucene. Existing indexes -will be automatically converted to the new format after the first - command. Be sure to backup your index before upgrading in -case you need to downgrade. +Older Apache Solr installations can be upgraded by replacing +the relevant war file with the new version. No changes to configuration +files should be needed. + +This version of Solr contains a new version of Lucene implementing +an updated index format. This version of Solr/Lucene can still read +and update indexes in the older formats, and will convert them to the new +format on the first index change. Be sure to backup your index before +upgrading in case you need to downgrade. Solr now recognizes HTTP Request headers related to HTTP Caching (see RFC 2616 sec13) and will by default respond with "304 Not Modified"