Rucio
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Introduction
Rucio is a CERN software system for storing file metadata and organizing the delivery of that data to users. Its primary features are scalability, flexibility, adaptive file replication, and built-in monitoring. It can use various backends for databases, various platforms for its servers and daemons, various transfer and storage method plug-ins, and a command line and python interface for users.
The new system would consist of these parts
- Metacat - a database of file metadata (docs)
- Rucio - a database of file locations, and servers which can move and track data, responding to user rules (docs)
- Data Dispatcher - a modern replacement for SAM project file delivery (docs)
- mdh - Mu2e data-handling commands added to supplement the above systems (see
mdh -h)
A few overarching concepts to keep in mind
- these system only recognition authentication with tokens
- metacat requires you to be authenticated to write to the database (create files, datasets)
- all files belong to a namespace
- if you create a namespace, it must start with your username (by policy)
- files must be named by the naming convention (by policy)
- all files are readable by all users
Implementation
export METACAT_SERVER_URL=http://dbweb5.fnal.gov:9094/mu2e_meta_prod/app export METACAT_AUTH_SERVER_URL=https://metacat.fnal.gov:8143/auth/mu2e export DATA_DISPATCHER_URL=https://metacat.fnal.gov:9443/mu2e_dd_prod/data export DATA_DISPATCHER_AUTH_URL=https://metacat.fnal.gov:8143/auth/mu2e