anandj91 commented on a change in pull request #15124: [MXNET-1294] 
Priority-based parameter propagation for improved data parallel training 
throughput
URL: https://github.com/apache/incubator-mxnet/pull/15124#discussion_r370945445
 
 

 ##########
 File path: python/mxnet/kvstore/kvstore.py
 ##########
 @@ -67,6 +68,7 @@ def __init__(self, handle):
         self._updater = None
         self._updater_func = None
         self._str_updater_func = None
+        self._is_p3 = (os.getenv('DMLC_PS_VAN_TYPE', '') == 'p3')
 
 Review comment:
   sure. I just wanted to confirm if we are planning to only add --p3 to 
launch.py now and not --horovod or --byteps because of the reasons I mentioned 
in the previous comment

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