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https://issues.apache.org/jira/browse/SPARK-4325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14355000#comment-14355000
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Sean Owen commented on SPARK-4325:
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Cool, if it's just a grouping issue with no 'content' of its own, I suggest
that the child issues be marked as sub-tasks. That seems like a fine convention.
If this is substantially its own issue with a few issues that represent related
pieces of work, I think I'd just describe what this one is about and mark the
others as related or contains. Or sub-tasks, hey. I guess the issue is just
recording what the parent is or isn't about in relation to the children. Here
it looked like there wasn't more to the parent.
> Improve spark-ec2 cluster launch times
> --------------------------------------
>
> Key: SPARK-4325
> URL: https://issues.apache.org/jira/browse/SPARK-4325
> Project: Spark
> Issue Type: Improvement
> Components: EC2
> Reporter: Nicholas Chammas
> Assignee: Nicholas Chammas
> Priority: Minor
> Fix For: 1.3.0
>
>
> There are several optimizations we know we can make to [{{setup.sh}} |
> https://github.com/mesos/spark-ec2/blob/v4/setup.sh] to make cluster launches
> faster.
> There are also some improvements to the AMIs that will help a lot.
> Potential improvements:
> * Upgrade the Spark AMIs and pre-install tools like Ganglia on them. This
> will reduce or eliminate SSH wait time and Ganglia init time.
> * Replace instances of {{download; rsync to rest of cluster}} with parallel
> downloads on all nodes of the cluster.
> * Replace instances of
> {code}
> for node in $NODES; do
> command
> sleep 0.3
> done
> wait{code}
> with simpler calls to {{pssh}}.
> * Remove the [linear backoff |
> https://github.com/apache/spark/blob/b32734e12d5197bad26c080e529edd875604c6fb/ec2/spark_ec2.py#L665]
> when we wait for SSH availability now that we are already waiting for EC2
> status checks to clear before testing SSH.
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