OpenCADC Storage Inventory System

The Storage Inventory system is designed to manage millions/billions of files for science data archive.

What is it? Concept Documentation

software components

storage-inventory-dm

This is the storage inventory data model and architecture documentation. TODO: Add an FAQ.

baldur

This is an implementation of the permissions service API using configurable rules to grant access based on resource identifiers (Artifact.uri values in the inventory data model).

critwall

This is an implementation of the file-sync process that runs at a storage site and downloads files.

fenwick

This is an implementation of the metadata-sync process that runs at both global inventory and at storage sites.

luskan

This is an implementation of the metadata service that enables querying the storage inventory at both global inventory and storage sites. It is an IVOA TAP service that supports ad-hoc querying of the inventory data model.

minoc

This is an implementation of the file service that supports HEAD, GET, PUT, POST, DELETE operations and IVOA SODA operations.

raven

This is an implementation of the global locator service that supports transfer negotiation and direct file GET requests.

ratik

This is an implementation of the metadata-validate process that runs at both global inventory and at storage sites.

ringhold

This is an implementation of part of the metadata-validate process that cleans up after a change in local artifact selection policy. This is used if the new fenwick policy excludes artifacts previously synced.

tantar

This is an implementation of the file-validate process that compares the inventory database against the back end storage at a storage site.

cadc-*

These are libraries used in multiple services and applications.

• cadc-inventory: core data model implementation
• cadc-inventory-db: database library
• cadc-inventory-util: re-usable code
• cadc-inventory-server: re-usable service code
• cadc-storage-adapter: defines the interface between inventory and back end storage
• cadc-storage-adapter-fs: storage adapter implementation for a POSIX filesystem back end
• cadc-storage-adapter-ad: storage adapter for the legacy CADC Archive Directory storage system (temporary)
• cadc-storage-adapter-swift: storeage adapter implementation for the Swift Object Store API (e.g. CEPH Object Store)
• cadc-storage-adapter-test: re-usable test suite for storage adapter implementations