DataDistribution status idea indicating what moves each process is involved with or helping with
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data distribution
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- C++
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Description
I'm thinking it would be useful to be able to get from DataDistribution a list of
`ProcessAddress NumShardsMovingOut NumShardsMovingIn NumShardMovesServed`
where for each shard being relocated and for each process of each team involved
- if the process is on only the team the shard is moving FROM then +1 is contributed to NumShardsMovingOut
- if the process is on only the team the shard is moving TO then +1 is contributed to NumShardsMovingIn
- if the process is on both the source and dest teams then +1 is contributed to NumShardMovesServed
This list could be provided in `status json` and/or periodically logged to TraceEvents, one event per ProcessAddress having any non-zero counts.
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