jiafu1115 commented on code in PR #20913:
URL: https://github.com/apache/kafka/pull/20913#discussion_r3201080327


##########
storage/src/main/java/org/apache/kafka/storage/internals/log/LogConfig.java:
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@@ -138,6 +144,10 @@ public Optional<String> serverConfigName(String 
configName) {
     public static final boolean DEFAULT_REMOTE_LOG_DELETE_ON_DISABLE_CONFIG = 
false;
     public static final long DEFAULT_LOCAL_RETENTION_BYTES = -2; // It 
indicates the value to be derived from RetentionBytes
     public static final long DEFAULT_LOCAL_RETENTION_MS = -2; // It indicates 
the value to be derived from RetentionMs
+    public static final long DEFAULT_REMOTE_COPY_LAG_MS = -2;  // It indicates 
no delay check based on local retention ms
+    public static final long DEFAULT_REMOTE_COPY_LAG_BYTES = -2; // It 
indicates no delay check based on local retention bytes

Review Comment:
   @kamalcph your case remind me to update the document which should remind 
user. if user using the size retention and time retention policy at the same 
time and user are not allow to set **only one** lag delay which will break 
retention policy. right?  is there any better solution for it? add validation 
for configuration? or some thing else? thanks for your reminder.



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