[GitHub] spark issue #17750: [SPARK-4899][MESOS] Support for checkpointing on Coarse ...

[lins05 <gi...@git.apache.org>]

Github user lins05 commented on the issue:

    https://github.com/apache/spark/pull/17750
  
    IMO we should not enable checkpointing in fine-grained mode. Because with checkpointing enabled, mesos agents would persist all status updates to disk which means great I/O cost because fine-grained mode makes use of mesos status updates to send the task results back to the driver.
    
    Also I'm not sure whether it makes sense to set the `failover_timeout` or not. The framework timeout is designed for frameworks that can reconcile with mesos master of existing tasks when re-connected, but the mesos scheduler in spark doesn't implement that yet. Currently when the spark driver disconnects with the mesos master, the master would immediately remove the spark driver from the frameworks list.


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