3424672656 commented on PR #9142:
URL: https://github.com/apache/rocketmq/pull/9142#issuecomment-2692127631

   > If there are already timer messages in the time wheel, how can we switch 
to the rocskdb version?
   
   For the final implementation we will provide two switches
   1.     The first switch: Whether to use rocksdb to support Wheel of Time
   2.     Second switch: Whether to disable the file version time wheel
   When there is a message in the file version time wheel, the two switches are 
enabled at the same time.     The file version supports only dequeue messages.  
   When there is no message from the file version wheel, turn off the second 
switch and switch completely to the rocksdb version


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