fapifta commented on a change in pull request #1430:
URL: https://github.com/apache/hadoop-ozone/pull/1430#discussion_r492706805
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File path:
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OzoneManagerStarter.java
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@@ -98,6 +98,28 @@ public void initOm()
}
}
+
+ /**
+ * This function implements a sub-command to allow the OM to be
+ * "prepared for upgrade".
+ */
+ @CommandLine.Command(name = "--prepareForUpgrade",
+ aliases = {"--prepareForDowngrade", "--flushTransactions"},
Review comment:
This command should be issued when the OM is already stopped before the
upgrade of software bits. This is a command that starts up the OM code in a
special way, with that it can start up only the current local OM, as I
understand.
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