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From Andrei Savu <savu.and...@gmail.com>
Subject Re: launching a one job cluster
Date Thu, 22 Sep 2011 22:29:09 GMT
Sorry for the confusion :) When I see job I think about Hadoop.

For arbitrary scripts I think jclouds provides some ways of doing this
as you already know. To make this process of checking if a script is
running low latency I think you need some sort of server side daemon
but I can't recommend one.

-- Andrei

On Thu, Sep 22, 2011 at 3:24 PM, David Alves <davidralves@gmail.com> wrote:
> As I said the thing is I'm NOT using hadoop :)
> I'm just running generic scripts/ssh commands.
> -david
> On Sep 22, 2011, at 5:20 PM, Andrei Savu wrote:
>> I don't know that much about how to manage jobs in Hadoop using the
>> API. Maybe Tom can provide a good answer to this. I completely
>> understand the elegance part :)
>> -- Andrei Savu
>> On Thu, Sep 22, 2011 at 3:17 PM, David Alves <davidralves@gmail.com> wrote:
>>> First there is the question of accuracy, as I said I am collecting metrics that
I'd like to be as accurate as possible.
>>> Second there is the matter of elegance. I always like to avoid polls whenever
>>> That being said, I don't wan't to embark in some odyssey just to avoid poll,
so if it really is too much trouble I am ok with letting it go.
>>> Anyhow even with poll is there something already implemented that enables it
in generic cases?
>>> thanks
>>> -david
>>> On Sep 22, 2011, at 5:09 PM, Andrei Savu wrote:
>>>> Why is so important to avoid having a poll? The cost is low and almost
>>>> any job is running at least for a few minutes.
>>>> -- Andrei
>>>> On Thu, Sep 22, 2011 at 3:07 PM, David Alves <davidralves@gmail.com>
>>>>> Hi Andrei
>>>>>        I know…
>>>>>        The thing is that code used the Hadoop JobClient class's runJob()
method that actually polls for progress.
>>>>>        I am not using hadoop (in hindsight using the word "job" might
have been a mistake) and I was wondering if there is already a way to do that for generic
cases (e.g., scripts or java programs).
>>>>>        In particular as I'm collecting accurate metrics I'd like
a non poll based technique.
>>>>>        Even if there is none I can always try and code it, so all
ideas are welcome.
>>>>> thanks
>>>>> david
>>>>> On Sep 22, 2011, at 4:52 PM, Andrei Savu wrote:
>>>>>> This is exactly what the example code is doing (and the hadoop
>>>>>> integration test). The job running code is blocking while the job
>>>>>> executing.
>>>>>> -- Andrei Savu / andreisavu.ro
>>>>>> On Thu, Sep 22, 2011 at 2:03 PM, David Alves <davidralves@gmail.com>
>>>>>>> Hi All
>>>>>>>        I need to launch a cluster run a job and terminate
the cluster as the job is finished (as soon as possible).
>>>>>>>        Is there any "nice" way to do this, or do you have
any suggestions?
>>>>>>>        On the top of my head I can imagine some quick and
dirty solutions (like creating a file whenever the task is completed and polling for its existence
from the whirr handler) but I'd like to do it without polling if possible. Any ideas?
>>>>>>> thanks
>>>>>>> -david

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