Github user nchammas commented on the pull request:
https://github.com/apache/spark/pull/4262#issuecomment-71972191
I'm thinking it would be useful for a separate PR to add some information
about how many nodes of the cluster are up during a cluster launch like this:
```
Waiting for cluster to enter 'ssh-ready' state... ( 1/30)
...
Waiting for cluster to enter 'ssh-ready' state... (29/30)
Waiting for cluster to enter 'ssh-ready' state... (30/30)
```
Or maybe just a simple spinner:
```
Waiting for cluster to enter 'ssh-ready' state... /
Waiting for cluster to enter 'ssh-ready' state... -
Waiting for cluster to enter 'ssh-ready' state... \
Waiting for cluster to enter 'ssh-ready' state... |
Waiting for cluster to enter 'ssh-ready' state... /
...
```
The original trail of dots also works.
In all cases we need to figure out how to do that neatly while allowing SSH
output to also be printed to screen.
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