holdenk commented on pull request #31493:
URL: https://github.com/apache/spark/pull/31493#issuecomment-774275909


   > In general, this mitigation cannot avoid the disk full situation 
fundamentally. Can we choose the migration target in a better way instead of 
this rejecting because this is due to the blind migration target selection?
   
   Yeah so this is a two part JIRA. The first part allows users to configure a 
maximum amount of shuffle blocks to store before rejecting remote shuffle 
blocks, and then longer term https://issues.apache.org/jira/browse/SPARK-34364 
proposes to allow users to configure a maximum disk pressure threshold. The 
primary reason I split this into two is that on K8s, measuring disk pressure is 
pretty complicated and I haven't been able to think of a good solution.


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