[Clas12_verystrange] Fwd: [Clas12_first_exp] Analysis trains and skims

[Eugene Pasyuk]

This is something we need to discuss at today's meeting: what skimming we would like to request. Be prepared with you suggestions. 

-Eugene 

----- Original Message -----

| From: "Raffaella De Vita" <Raffaella.Devita at ge.infn.it>
| To: "Eugene Pasyuk" <pasyuk at jlab.org>
| Cc: "clas12 first exp" <clas12_first_exp at jlab.org>
| Sent: Thursday, August 2, 2018 8:49:31 AM
| Subject: Re: [Clas12_first_exp] Analysis trains and skims

| 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
| | 
| 

| | | _______________________________________________
| | 
| 
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| | 
| 
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