pic-rucio 2024.9.25.120640

PIC rucio client transfer package

Pic rucio client

Introduction

The PIC Rucio client is a python package developed with the purpose of automating the transfers from an origin storage endpoint (e.g. Magic observatory) to a destination one (e.g. PIC).

The package contains the pic_rucio executable that can be run as a cron to discover new files, trigger their transfer and update their status.

Requirements

• python >= 3.6
• python-gfal2: WARNING The installation of this package through pip may not be straightforward
• rucio_clients

Installation

From the root folder, in an environment with python and pip installed.

pip install .

Documentation

Configuration

TBD

Workflow

• File discovery through DB or CSV (WIP)
• ES status check
• Metadata construction
• Origin RSE replica registry
• Destination RSE replication rule creation
• Outdated replica rule creation to purge replicas in the origin RSE (To be fixed)

Magic implementation

The implementation of the PIC Rucio Client for Magic contains some tricks that are crucial for its correct fuctioning

• Configuration
  • lfn2pfn algorithm: identity, the pfn is the lfn
  • schema: allow additional characters (/, +, etc) in the DID name to allow storing paths in the name
  • scope: pnfs
• RSEs:
  • Origin: ORM-NON-DET, non-deterministic GridFTP RSE at Roque de los Muchachos Observatory.
  • Destination: MAGIC-PRD, deterministic GridFTP RSE pointing to door05.pic.es at PIC, with prefix=//
• DIDs
  • Files: the name contains the full path to PIC storage without the leading pnfs added because it is the scope, e.g.: pic.es/data/magic/Data/SuperStar/v1/4C+27.50/2024_09_12/20240912_05116784_S_4C+27.50-W0.40+180.root. {scope}/{name} is the real path at PIC.
  • Datasets:
    • Run (e.g. 5116790), should contain the files in a run. All the ones I inspected are empty.
    • Outdated replication dataset (e.g. pnfs:outdated_replication_dataset-3cef6bc5-1d8c-493d-aaad-2868b18a2f5e) The intention of this was to trigger the deletion of the replicas at ORM after successfully transferred, but this mechanism doesn't seem to be working.
  • Containers:
    • %Y_%M_%d: observation date, empty
    • Source name: empty

Check the Magic example in the development environment

Development

installation

The same but will be installed in editable mode and some additional packages needed for development will be included.

pip install -e .[dev]

pre-commit hooks

Some pre-commit hooks are included to enforce best practices. See the pre-commit documentation

Install hooks: pre-commit install Run hooks manually: pre-commit run --all-files