zjffdu commented on a change in pull request #3320: [ZEPPELIN-3977]. Create 
shell script for converting old note file to new file
URL: https://github.com/apache/zeppelin/pull/3320#discussion_r265456536
 
 

 ##########
 File path: docs/setup/operation/upgrading.md
 ##########
 @@ -35,6 +35,12 @@ So, copying `notebook` and `conf` directory should be 
enough.
 
 ## Migration Guide
 
+### Upgrading from Zeppelin 0.8 to 0.9
+
+ - From 0.9, we change the notes file name structure 
([ZEPPELIN-2619](https://issues.apache.org/jira/browse/ZEPPELIN-2619)). So when 
you upgrading zeppelin to 0.9, you need to upgrade note file. Here's steps you 
need to follow:
 
 Review comment:
   Regarding note compatibility across versions, user can still import note 
from 0.8 to 0.9 and vice versa. But if user copy 0.8 notes to 0.9 zeppelin 
instance, zeppelin won't recognize these notes. Because we changed the note 
file extension and user need to use this upgrade tool to do note upgrade

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