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rootSystem Design

The Chronopolis project has system employs two sets of software which suites that interact with each other in order to provide bit-level preservation. The first, ChronCore, is a set of services which distribute data throughout the Chronopolis Network, which are network. These services are named Intake, Ingest, and Replication. The second software suite employed by the Chronopolis network is the Audit Control Environment (ACE) which continually audits data in Chronopolis to ensure the integrity of both the checksums and files which we keep track of. ACE consists of both an Audit Manager (ACE-AM) which runs locally at each network node and an Integrity Management Service (ACE-IMS) which is a web service currently hosted by Texas Digital Library (TDL).

In addition to the software used for distributing data through the network, there are additional services for tertiary tasks:

  • Repair - automates the workflow for correcting file errors within the Chronopolis Network
  • Restore - automates the workflow for returning data back to a Depositor

ChronCore Services

Packaging

Data in Chronopolis is packaged using the BagIt specification.

Glossary

Depositor
An institution, person, or conglomerate which is a part of Chronopolis and has data to be stored for bit-level preservation

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Intake
The first distribution service layer which brings external data into Chronopolis. The process of transferring a bag to a filesystem directory where an Ingest service can process it.

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Node
An organization which is part of the Chronopolis Network and stores data for Depositors

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