[Clas12_first_exp] Analysis trains and skims

[Raffaella De Vita]

Dear Eugene,
has Latifa mentioned in her emails yesterday, the plan for the first 
experiment is to have skims collected by next Wednesday. However, it 
would be good to get request before the end of the week, tomorrow EOB, 
to be able to run some tests during the weekend and check the skim sizes.
Best regards,
     Raffaella

Eugene Pasyuk wrote:
> Raffaella,
>
> Any definite date we need to come up with the train requests?
>
> -Eugene
> ------------------------------------------------------------------------
> *From:* Raffaella De Vita
> *Sent:* Wed Aug 01 22:16:50 EDT 2018
> *To:* clas12_first_exp at jlab.org
> *Subject:* [Clas12_first_exp] Analysis trains and skims
>
> Dear All,
> here is more information about the status of analysis trains and about 
> the feedback that would be useful to have from collaborators to start 
> more accurate tests.
>
> Gagik has released the first version of the analysis train software.
> - Analysis trains are conceived to do "event selection": they use DSTs 
> as input, i.e. cooked files with all events but only the banks that 
> are relevant for the analysis (see Nathan's documentation at 
> https://clasweb.jlab.org/wiki/index.php/CLAS12_DSTs), and for now to 
> output skims for different event topologies with the same hipo format 
> and the same banks of the input files.
> - Different skims, defined based on user requests, make the train 
> "wagons". After collecting user requests for wagons, trains will be 
> run centrally by a single chef, to optimize the efficiency of the 
> skimming process and avoid I/O problems that are expected to arise 
> with several people trying to access large DST volumes simultaneously.
> - Skim conditions can be defined based on the number and type of final 
> state particles as explained in Gagik's documentation at 
> https://userweb.jlab.org/~gavalian/docs/sphinx/hipo/html/chapters/analysis_train.html#event-filters. 
>
>
> To define the first trains and start testing the overall process, we 
> would like to ask collaborators to come up with requests for final 
> state topologies for their favorite reactions:
> - check the instructions at 
> https://userweb.jlab.org/~gavalian/docs/sphinx/hipo/html/chapters/analysis_train.html#event-filters 
> and send us your "wagon" definition;
> - keep in mind that, for a skim to be useful, it should correspond to 
> a small fraction of the input data; you can estimate the reduction 
> factor of your proposed skimming condition using the sample DSTs 
> available in /work/clas12/clas12/data/calib/dst_5bp6p1/; the overall 
> train output size (sum of all skims that will be collected) should be 
> less than 50% of the input DST;
> - once requests will be collected and reviewed to remove possible 
> duplications, a train will be assembled and tests will begin.
>
> Best regards,
>     Raffaella
>
>
>
>
>
> Latifa Elouadrhiri wrote:
>>
>> Dear all,
>>
>> The meeting this morning is cancelled.
>>
>> The meeting agenda for next week will focus on the following:
>>
>> *Spring Run*
>>
>>   * Status of the data processing
>>   * Analysis trains for each one of the major analysis group: please
>>     send me the requested filtering so far I have the one from SIDIS
>>     (Harut) and From Nucleon Structure (Ralf).
>>
>> *Fall Run*
>>
>>   * We will review where we are in term of tracking efficiency based
>>     on the latest release and make decision on the luminosity for the
>>     upcoming run
>>   * List of run coordinators
>>   * Run plan
>>
>> Best regards,
>>
>> Latifa
>>
>>
>>
>>
>> _______________________________________________
>> Clas12_first_exp mailing list
>> Clas12_first_exp at jlab.org
>> https://mailman.jlab.org/mailman/listinfo/clas12_first_exp
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/clas12_first_exp/attachments/20180802/3d570a23/attachment.html>