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Re: How to know the DAG is starting to run


We should really instrument an interface for airflow so integration is more succinct between disparate systems!!!

Sent from my iPhone

> On 12/05/2018, at 12:09 AM, James Meickle <jmeickle@xxxxxxxxxxxxxx> wrote:
>
> Song:
>
> You can put an operator as the very first node in the DAG, and have
> everything else in the DAG depend on it. For example, this is the approach
> we use to only execute DAG tasks on stock market trading days.
>
> -James M.
>
>> On Fri, May 11, 2018 at 3:57 AM, Song Liu <songliu@xxxxxxxxxxx> wrote:
>>
>> Hi,
>>
>> I have something just want to be done only once when DAG is constructed,
>> but it seems that DAG will be instanced every time when run each of
>> operator.
>>
>> So is that there function in DAG that tell us it is starting to run now ?
>>
>> Thanks,
>> Song
>>



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