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Date: Thu, 8 Dec 2011 11:31:20 +0900
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Subject: Re: Add counting feature to get the total number of message exchanges
From: "Edward J. Yoon" <edwardyoon@apache.org>
To: hama-dev@incubator.apache.org
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All,

Please check this issue:

https://issues.apache.org/jira/browse/HAMA-486

On Fri, Nov 25, 2011 at 11:16 AM, Chia-Hung Lin <clin4j@googlemail.com> wro=
te:
> +1 for pluggable feature/ =C2=A0hadoop's counter arch
>
> On 25 November 2011 01:05, Thomas Jungblut
> <thomas.jungblut@googlemail.com> wrote:
>> Great, I open an issue for this counter stuff.
>>
>> 2011/11/24 Edward J. Yoon <edwardyoon@apache.org>
>>
>>> >> I think it would be good as a 'pluggable' feature as this counting
>>> could>> impact performances.
>>> and
>>>
>>> > It is difficult to say whether we actually need this.*
>>> > *In case of SSSP it is useful, but as Tommaso says it can degrade
>>>
>>> I agree with you. If possible, let's provide as a optional feature.
>>>
>>> > What do you think of a similar architecture of Counters like in Hadoo=
p?
>>>
>>> Good.
>>>
>>> Currently, our Job client reports only shows the total number of
>>> supersteps. I think that the Job reports needs to be strengthened. :-)
>>>
>>> On Thu, Nov 24, 2011 at 11:05 PM, Thomas Jungblut
>>> <thomas.jungblut@googlemail.com> wrote:
>>> > It is difficult to say whether we actually need this.*
>>> > *In case of SSSP it is useful, but as Tommaso says it can degrade
>>> > performance for every other BSP by increasing the cost of the sync.
>>> >
>>> > What do you think of a similar architecture of Counters like in Hadoo=
p?
>>> > This could contain even more information, e.G. the number of bytes
>>> > transferred etc.
>>> >
>>> > 2011/11/24 Tommaso Teofili <tommaso.teofili@gmail.com>
>>> >
>>> >> Hello Edward,
>>> >>
>>> >> I think it would be good as a 'pluggable' feature as this counting c=
ould
>>> >> impact performances.
>>> >> So it'd be useful when explicitly "debugging" while it should be, in=
 my
>>> >> opinion, disabled by default.
>>> >>
>>> >> My 2 cents.
>>> >> Tommaso
>>> >>
>>> >>
>>> >> 2011/11/24 Edward J. Yoon <edwardyoon@apache.org>
>>> >>
>>> >> > Hi all,
>>> >> >
>>> >> > I'd like to add counting feature to get the total number of messag=
e
>>> >> > exchanges during one synchronization among BSP tasks. Before leave
>>> >> > barrier in sync() method, each task can report their counts.
>>> >> >
>>> >> > This information will be useful to user and, some applications (fo=
r
>>> >> > example, the sync cost of current SSSP example can be reduced to 1=
/3).
>>> >> > Should we add this feature?
>>> >> >
>>> >> > --
>>> >> > Best Regards, Edward J. Yoon
>>> >> > @eddieyoon
>>> >> >
>>> >>
>>> >
>>> >
>>> >
>>> > --
>>> > Thomas Jungblut
>>> > Berlin <thomas.jungblut@gmail.com>
>>> >
>>>
>>>
>>>
>>> --
>>> Best Regards, Edward J. Yoon
>>> @eddieyoon
>>>
>>
>>
>>
>> --
>> Thomas Jungblut
>> Berlin <thomas.jungblut@gmail.com>
>>


--=20
Best Regards, Edward J. Yoon
@eddieyoon