jonmeredith commented on code in PR #1758:
URL: https://github.com/apache/cassandra/pull/1758#discussion_r931510717


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conf/cassandra.yaml:
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@@ -992,6 +992,8 @@ compaction_throughput: 64MiB/s
 # are completely written, and used in place of the prior sstables for
 # any range that has been written. This helps to smoothly transfer reads 
 # between the sstables, reducing page cache churn and keeping hot rows hot
+# Set sstable_preemptive_open_interval to null for disabled which is 
equivalent to the sstable_preemptive_open_interval_in_mb
+# being negative

Review Comment:
   I think a separate flag would be a good idea and cleaner than relying on 
magic values to control whether features are enabled or not.  Does the new 
config framework have the capability to drive to settings from the deprecated 
`sstable_preemptive_open_interval_in_mb`?



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