[jira] [Commented] (HDFS-14753) Document HDFS-8432 (Introduce a minimum compatible layout version to allow downgrade in more rolling upgrade use cases)
[ https://issues.apache.org/jira/browse/HDFS-14753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16955860#comment-16955860 ] Fei Hui commented on HDFS-14753: :( Document is difficult After HDFS-14509, RollingUpgrade from 2.x to 3.x has 3 steps: # upgrade from 2.x to 2.10 # upgrade from 2.10 to 3.x I think we can do some efforts for upgrading from 2.x directly to 3.x directly. During uprading NN generates password without new filelds, maybe we can do Upgrading from 2.x to 3.x directly HDFS-14831 Has not been fixed. it's need to be fixed because rollback is impossible because of incompatible changes. [~aajisaka] Any suggestions? > Document HDFS-8432 (Introduce a minimum compatible layout version to allow > downgrade in more rolling upgrade use cases) > --- > > Key: HDFS-14753 > URL: https://issues.apache.org/jira/browse/HDFS-14753 > Project: Hadoop HDFS > Issue Type: Improvement > Components: documentation, rolling upgrades >Reporter: Akira Ajisaka >Priority: Major > > After HDFS-8432, we can downgrade to the different layout version if the > layout version of the destination is equal to or greater than the minimum > compatible layout version of the source. This information is very important > for administrators and it needs to be documented. -- This message was sent by Atlassian Jira (v8.3.4#803005) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
[jira] [Commented] (HDFS-14753) Document HDFS-8432 (Introduce a minimum compatible layout version to allow downgrade in more rolling upgrade use cases)
[ https://issues.apache.org/jira/browse/HDFS-14753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16919640#comment-16919640 ] Akira Ajisaka commented on HDFS-14753: -- The document is here: [https://hadoop.apache.org/docs/r3.2.0/hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html] Source code: [https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HdfsRollingUpgrade.md] > Document HDFS-8432 (Introduce a minimum compatible layout version to allow > downgrade in more rolling upgrade use cases) > --- > > Key: HDFS-14753 > URL: https://issues.apache.org/jira/browse/HDFS-14753 > Project: Hadoop HDFS > Issue Type: Improvement > Components: documentation, rolling upgrades >Reporter: Akira Ajisaka >Priority: Major > > After HDFS-8432, we can downgrade to the different layout version if the > layout version of the destination is equal to or greater than the minimum > compatible layout version of the source. This information is very important > for administrators and it needs to be documented. -- This message was sent by Atlassian Jira (v8.3.2#803003) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
[jira] [Commented] (HDFS-14753) Document HDFS-8432 (Introduce a minimum compatible layout version to allow downgrade in more rolling upgrade use cases)
[ https://issues.apache.org/jira/browse/HDFS-14753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16919452#comment-16919452 ] Fei Hui commented on HDFS-14753: [~aajisaka] Thanks for filing this issue. It makes sense. Where should we document? > Document HDFS-8432 (Introduce a minimum compatible layout version to allow > downgrade in more rolling upgrade use cases) > --- > > Key: HDFS-14753 > URL: https://issues.apache.org/jira/browse/HDFS-14753 > Project: Hadoop HDFS > Issue Type: Improvement > Components: documentation, rolling upgrades >Reporter: Akira Ajisaka >Priority: Major > > After HDFS-8432, we can downgrade to the different layout version if the > layout version of the destination is equal to or greater than the minimum > compatible layout version of the source. This information is very important > for administrators and it needs to be documented. -- This message was sent by Atlassian Jira (v8.3.2#803003) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
