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Date: Fri, 30 Nov 2012 17:47:09 +0100
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Subject: Re: Can hama monitor the num of alive nodes or num of tasks in last
 superstep?
From: Thomas Jungblut <thomas.jungblut@gmail.com>
To: dev@hama.apache.org
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Wait a second, can you tell us what kind of API are you using? I assume you
use the vertex API in the graph package right?

2012/11/30 Suraj Menon <surajsmenon@apache.org>

> Hi lee,
>
> I am assuming 'node' here implies BSP peer.
>
> You would have this feature once I get HAMA-652 (
> https://issues.apache.org/jira/browse/HAMA-652) working. For now you can
> do
> something similar to what is done is graph processing.
> Keep sending a vote to halt(message) to every other peers, when you want to
> halt, until in the next superstep you find that the number of votes ==
> number of peers. This is a limitation in the current implementation. We
> need all the peers running together and peer.sync won't proceed until all
> the peers enter and leave the synchronization barrier. Please check the
> progress on HAMA-652, it should get fixed in near future.
>
> Thanks,
> Suraj
>
> On Fri, Nov 30, 2012 at 11:05 AM, lee fei <chirsfei@gmail.com> wrote:
>
> > Thank you for you help~
> >
> >    I need to know if there is any node active in last superstep to
> > decide which the sub program should to process in the compute( )
> function.
> > So if I can get the sum of alive nodes(not halted) in last superstep or
> the
> > sum of messages sent in last superstep, I can easily make the decision.
> >
> > Is there a way to do that?
> >
> > On Fri, Nov 30, 2012 at 8:30 PM, Edward <edward@udanax.org> wrote:
> >
> > > It should be always equal to launched tasks num. Instead, we can count
> > > failure tasks num. Why do you need?
> > >
> > > Sent from my iPhone
> > >
> > > On Nov 30, 2012, at 6:29 PM, lee fei <chirsfei@gmail.com> wrote:
> > >
> > > > Hi,
> > > >
> > > >  Did hama have record the sum of alive nodes or sum of tasks in last
> > > > superstep? Is there a way to get this kinds of values?
> > > >
> > > > Thank you for you attention:D
> > >
> >
>

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