Active Learning(AL)

Active Learning is an usecase of iDDS. The purpose of iDDS AL is to use iDDS to run some ‘active learning’ process to tell production system whether to continue some process.

iDDS AL workflow

iDDS ActiveLearning

ActiveLearning employs iDDS DAG workflow management to define tasks.

  1. It uses processing template and learning template to define the processing workflow.
  2. It uses a Condition branch to control the workflow.
  3. When executing, the processing template will generate a PanDA task.
  4. When the PanDA task finishes, the learning template will generate a learning task which will run in iDDS internally condor cluster, to analyse the outputs of the PanDA task. The result of the learning task will decide whether to generate new PanDA tasks or to terminate.

processing task (ATLASPandaWork)

  1. upload inputs to Panda cache server and define the task parameter map.
import json
import re
import time
# import traceback

    from urllib import quote
except ImportError:
    from urllib.parse import quote

from pandatools import Client

from idds.client.clientmanager import ClientManager
from idds.common.utils import get_rest_host, run_command

from idds.workflow.workflow import Condition, Workflow
from idds.atlas.workflow.atlaspandawork import ATLASPandaWork
from idds.atlas.workflow.atlasactuatorwork import ATLASActuatorWork

# Here a fake method is used.
def get_task_id(output, error):
    m ='jediTaskID=(\d+)', output + error)  # noqa W605
    task_id = int(
    return task_id

def submit_processing_task():
    outDS = "user.wguan.altest%s" % str(int(time.time()))
    cmd = "cd /afs/; prun --exec 'python 0.5 0.5 200 output.json' --outDS %s  --outputs output.json --nJobs=10" % outDS
    status, output, error = run_command(cmd)

    INFO : gathering files under /afs/
    INFO : upload source files
    INFO : submit user.wguan.altest1234/
    INFO : succeeded. new jediTaskID=23752996
    if status == 0:
        task_id = get_task_id(output, error)
        return task_id
        raise Exception(output + error)

def get_panda_task_paramsmap(panda_task_id):
    status, task_param_map = Client.getTaskParamsMap(panda_task_id)
    if status == 0:
        task_param_map = json.loads(task_param_map)
        return task_param_map
    return None

def define_panda_task_paramsmap():
    # here is using a fake method by submitting a panda task.
    # Users should define the task params map by themselves.

    # (0, '{"buildSpec": {"jobParameters": "-i ${IN} -o ${OUT} --sourceURL ${SURL} -r . ", "archiveName": "sources.0ca6a2fb-4ad0-42d0-979d-aa7c284f1ff7.tar.gz", "prodSourceLabel": "panda"}, "sourceURL": "", "cliParams": "prun --exec \\"python 0.5 0.5 200 output.json\\" --outDS user.wguan.altest1234 --outputs output.json --nJobs=10", "site": null, "vo": "atlas", "respectSplitRule": true, "osInfo": "Linux-3.10.0-1127.19.1.el7.x86_64-x86_64-with-centos-7.9.2009-Core", "log": {"type": "template", "param_type": "log", "container": "user.wguan.altest1234.log/", "value": "user.wguan.altest1234.log.$JEDITASKID.${SN}.log.tgz", "dataset": "user.wguan.altest1234.log/"}, "transUses": "", "excludedSite": [], "nMaxFilesPerJob": 200, "uniqueTaskName": true, "noInput": true, "taskName": "user.wguan.altest1234/", "transHome": null, "includedSite": null, "nEvents": 10, "nEventsPerJob": 1, "jobParameters": [{"type": "constant", "value": "-j \\"\\" --sourceURL ${SURL}"}, {"type": "constant", "value": "-r ."}, {"padding": false, "type": "constant", "value": "-p \\""}, {"padding": false, "type": "constant", "value": ""}, {"type": "constant", "value": "\\""}, {"type": "constant", "value": "-l ${LIB}"}, {"container": "user.wguan.altest1234_output.json/", "value": "user.wguan.$JEDITASKID._${SN/P}.output.json", "dataset": "user.wguan.altest1234_output.json/", "param_type": "output", "hidden": true, "type": "template"}, {"type": "constant", "value": "-o \\"{\'output.json\': \'user.wguan.$JEDITASKID._${SN/P}.output.json\'}\\""}], "prodSourceLabel": "user", "processingType": "panda-client-1.4.47-jedi-run", "architecture": "@centos7", "userName": "Wen Guan", "taskType": "anal", "taskPriority": 1000, "countryGroup": "us"}')  # noqa E501

    task_id = submit_processing_task()
    task_param_map = get_panda_task_paramsmap(task_id)
    cmd_to_arguments = {'arguments': 'python 0.5 0.5 200',
                        'parameters': 'python {m1} {m2} {nevents}'}

    # update the cliParams to have undefined parameters, these parameters {m1}, {m2}, {nevents} will be the outputs of learning script.
    task_param_map['cliParams'] = task_param_map['cliParams'].replace(cmd_to_arguments['arguments'], cmd_to_arguments['parameters'])
    jobParameters = task_param_map['jobParameters']
    for p in jobParameters:
        if 'value' in p:
            p['value'] = p['value'].replace(quote(cmd_to_arguments['arguments']), quote(cmd_to_arguments['parameters']))
    return task_param_map
  1. define the panda work.
task_param_map = define_panda_task_paramsmap()
panda_work = ATLASPandaWork(panda_task_paramsmap=task_param_map)

# it's needed to parse the panda task parameter information, for example output dataset name, for the next task.
# if the information is not needed, you don't need to run it manually. iDDS will call it interally to parse the information.

learning task (ATLASActuatorWork)

  1. define the learning task.
    1. The input collection of the learning task is the output of the panda task. iDDS will download all files of this dataset to local storage and process them.
    2. The sandbox is using the panda task’s sandbox. You can also use iDDS cache server for it.
work_output_coll = panda_work.get_output_collections()[0]

input_coll = {'scope': work_output_coll['scope'],
              'name': work_output_coll['name'],
              'coll_metadata': {'force_close': True}}  # by default the panda collection is not closed. If it's not closed, iDDS will poll again and again without stop.
output_coll = {'scope': work_output_coll['scope'],
               'name': work_output_coll['name'] + "." + str(int(time.time()))}

# acutator = ATLASActuatorWork(executable='python', arguments=' {output_json} {events} {dataset}/{filename}',
acutator = ATLASActuatorWork(executable='python', arguments=' {output_json} {events} {dataset}',
                             parameters={'output_json': 'merge.json',
                                         'events': 200,
                                         'dataset': '{scope}:{name}'.format(**input_coll),
                                         'filename': 'output*.json'},
                             sandbox=panda_work.sandbox, primary_input_collection=input_coll,
                             output_collections=output_coll, output_json='merge.json')

Define workflow

wf = Workflow()
# because the two tasks are in a loop. It's good to set which one to start.
cond = Condition(panda_work.is_finished, current_work=panda_work, true_work=acutator, false_work=None)
cond1 = Condition(acutator.generate_new_task, current_work=acutator, true_work=panda_work, false_work=None)

# because the two works are in a loop, they are not independent. This call is needed to tell which one to start.
# otherwise idds will use the first one to start.

# work.set_workflow(wf)
return wf