Daskathon

Deploy dask-worker processes on Marathon in response to load on a Dask scheduler. This creates a Marathon application of dask-worker processes. It watches a Dask Scheduler object in the local process and, based on current requested load, scales the Marathon application up and down.

Run

It's not yet clear how to expose all of the necessary options to a command line interface. For now we're doing everything manually.

Make an IOLoop running in a separate thread:

with MarathonCluster(marathon='http://localhost:8080',
                     cpus=1, mem=512, adaptive=True) as mc:
    with Client(mc.scheduler_address) as c:
        x = c.submit(lambda x: x + 1, 1)
        assert x.result() == 2

Create a Client and submit work to the scheduler. Marathon will scale workers up and down as neccessary in response to current workload.

from distributed import Client
c = Client(s.address)

future = c.submit(lambda x: x + 1, 10)

TODO

• [x] Deploy the scheduler on the cluster
• [x] Support a command line interface

Docker Testing Harness

This sets up a docker cluster of one Mesos master and two Mesos agents using docker-compose.

Requires:

• docker version >= 1.11.1
• docker-compose version >= 1.7.1

docker-compose up

Run py.test:

py.test dask-marathon

Web UIs

• http://localhost:5050/ for Mesos master UI
• http://localhost:5051/ for the first Mesos agent UI
• http://localhost:8080/ for Marathon UI

History

Dask-marathon originally forked from https://github.com/mrocklin/dask-marathon