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adding master/slave upgrade notice 

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@641660 13f79535-47bb-0310-9956-ffa450edef68
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Ryan McKinley 2008-03-27 00:31:21 +00:00
parent 85819cd41e
commit fe6debb2a5
1 changed files with 12 additions and 5 deletions
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@ -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
<update> 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"