Charm++ parallel programming system

[Ralf Gunter Correa Carvalho <correac2 AT illinois.edu>]

Please make sure you keep the mailing list CC'd on replies.

We are working on integrating this feature for a future release, but depending on how bleeding edge you are willing to be we may be able to set you up with an experimental branch. Currently our point person for that (Bilge Acun -- cc'd), who built on top of work from Abhishek Gupta (also cc'd, though possibly to an old address), is away until mid June, but I've worked on that a little bit and might be able to get you up and running. Here's another reference to check before proceeding with this:

  http://charm.cs.illinois.edu/newPapers/14-29/paper.pdf

2015-05-20 14:34 GMT-05:00 Vinícius Meyer <vinimeyer AT hotmail.com>:

Ralf,
Thanks for the answer. The idea of my project is to create a cloud computing environment to acquire performance in some application. Exploring this multi level architecture:

nodes (hosts) -> VMs (virtual machines) -> processes (objects).

With the reconfiguration of VMs I wish:

- Create objects;
- Migrate objects;
- Consolidate objects.

With the CHARM ++ this would be possible. If the system needed more VMs (elasticity) the CHARM ++ could send "chares" for new processing cores to reschedule the system.

Vinícius M.

---

Date: Wed, 20 May 2015 13:46:32 -0500
Subject: Re: [ppl] [charm] Add Nodes at runtime
From: correac2 AT illinois.edu
To: vinimeyer AT hotmail.com
CC: charm AT cs.uiuc.edu

Hi Vinícius,

As far as I know, the main release of charm does not support adding new hosts during runtime. However, there is ongoing work that allows a modified scheduler to dynamically shrink or expand the number of running nodes, though my understanding of it is that it would still mostly work from a given nodelist group (just possibly using fewer or more of those nodes.) Here's a set of slides describing that feature:

  http://charm.cs.illinois.edu/workshops/charmWorkshop2015/slides/CharmWorkshop2015_rts_malleable.pdf

If you could into a little bit of detail about what exactly you want to do (e.g. your cluster setup), we may be able to help you out.

2015-05-20 12:48 GMT-05:00 Vinícius Meyer <vinimeyer AT hotmail.com>:

Hi forum members,

CHARM ++ can add nodes at runtime at a scalable way (elastic)?
From what I researched, CHARM++ can run on N nodes previously defined by the command:

./charrun pN + ./Program

Where pN + respects the "charelist"
It is possible to add nodes in "charelist" at runtime?

Thanks,
Vinícius M.

Master's student

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