qingyuan18 opened a new issue #3737:
URL: https://github.com/apache/hudi/issues/3737


   we have a customer which using COW table before, however ,their sourcing 
data become more and more huge in Kafka, and also there are couple of upsert 
into Hudi table sink in spark streaming , so to turning the performance of 
writing, we plan to convert the COW table into MOR table
   
   the problem is : how can we migrate their former COW table, which their live 
system has already consuming it. does it need to re-bootstrap , or it can 
directly change sink mechanism in Spark streaming and write into the MOR table 
on top of the COW table?
   
   please help to guide a best practise , have you met this requirement before ?
   
   **Environment Description**
   
   * Hudi version : 0.8
   
   * Spark version : 3.1
   
   * Hive version :2.4
   
   * Hadoop version : 3.1
   
   * Storage (HDFS/S3/GCS..) : AWS S3
   
   * Running on Docker? (yes/no) : no
   
   
   


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