Justinwins commented on a change in pull request #10652:
URL: https://github.com/apache/kafka/pull/10652#discussion_r684042834
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File path: docs/upgrade.html
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@@ -83,7 +83,13 @@ <h5><a id="upgrade_300_notable"
href="#upgrade_300_notable">Notable changes in 3
understood by brokers or version 2.5 or higher, so you must upgrade
your kafka cluster to get the stronger semantics. Otherwise, you can just pass
in <code>new ConsumerGroupMetadata(consumerGroupId)</code> to work
with older brokers. See <a
href="https://cwiki.apache.org/confluence/x/zJONCg";>KIP-732</a> for more
details.
</li>
-
+ <li> The Connect-based MirrorMaker (MM2) includes changes to support
<code>IdentityReplicationPolicy</code>, enabling replication without renaming
topics.
+ The existing <code>DefaultReplicationPolicy</code> is still used by
default, but identity replication can be enabled via the
+ <code>replication.policy</code> configuration property. This is
especially useful for users migrating from the older MirrorMaker (MM1), or for
Review comment:
i think it's more clear to say "replication.policy.class " here ,you
know , which means it's configured in that form in mm2.properties file.
Friendly to beginners .
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