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From Kay Ousterhout <>
Subject Re: Replacing Spark's native scheduler with Sparrow
Date Sat, 08 Nov 2014 00:42:16 GMT
Hi Nick,

This hasn't yet been directly supported by Spark because of a lack of
demand.  The last time I ran a throughput test on the default Spark
scheduler (~1 year ago, so this may have changed), it could launch
approximately 1500 tasks / second.  If, for example, you have a cluster of
100 machines, this means the scheduler can launch 150 tasks per machine per
second.  I don't know of any existing Spark clusters that have a large
enough number of machines or short enough tasks to justify the added
complexity of distributing the scheduler.  Eventually I hope to see Spark
used on much larger clusters, such that Sparrow will be necessary!


On Fri, Nov 7, 2014 at 3:05 PM, Nicholas Chammas <
> wrote:

> I just watched Kay's talk from 2013 on Sparrow
> <>. Is replacing Spark's native
> scheduler with Sparrow still on the books?
> The Sparrow repo <> hasn't been updated
> recently, and I don't see any JIRA issues about it.
> It would be good to at least have a JIRA issue to track progress on this if
> it's a long-term goal.
> Nick

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