Re: [Condor-users] Hooks in the Scheduler Universe?

[David Arthur <mumrah@xxxxxxxxx>]

I use the "prepare job" hook to emit an event to let me know when a
job is about to start, and similarly the "job exit" hook emits an
event so i know when and in what state the job finished.


On Wed, Oct 6, 2010 at 3:03 PM, Matthew Farrellee <matt@xxxxxxxxxx> wrote:
> Ian Chesal wrote:
>>
>> On Wed, Oct 6, 2010 at 10:28 AM, David Arthur <mumrah@xxxxxxxxx
>> <mailto:mumrah@xxxxxxxxx>> wrote:
>>
>>    I'm hoping to use the Job Hook system for DAGs. I would like to
>>    utilize the "prepare job" and "job exit" hooks (to get notifications
>>    when the DAG is about to start, and once it's complete).
>>
>>
>> I don't want to knock too much on hooks, but unless you're using them on
>> non-Windows nodes I wouldn't recommend this approach. The technology is
>> still unstable on Windows.  It's very easy to crash a startd.
>
> That pipe/signal bug never got fully flushed out did it?
>
>
>> I've never considered running *just* the prepare_job hook, without a
>> corresponding fetch_work hook.
>
> I've used this for VM image transfer and cache maintenance. It is quite
> useful to realize that hooks can run for any job independently of if the job
> was pulled from the FETCH_WORK hook.
>
> You can look for references to "toppings" from the last few Condor weeks
> (maybe last 3!). The prepare hook can actually modify the job ad before the
> job is executed.
>
>
>> The technology is condor_starter specific I believe. The scheduler
>> universe doesn't use a condor_starter to run its jobs as far as I'm aware.
>
> That's true.
>
>
> Best,
>
>
> matt
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-- 
David Arthur