This page provides an overview of DuraCloud and answers common questions about the service. You can also review full documentation for DuraCloud or learn more about subscriptions from DuraCloud by LYRASIS or DuraCloud Europe from 4Science. You can download a flyer about our services (PDF)DuraCloud hosting with Lyrasis.
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DuraCloud is an open source, hosted service that makes it easy to control where and how your organization preserves content in the cloud. DuraCloud enables your institution to store content with expert cloud storage providers while adding lightweight features that enable digital preservation, data access, and data sharing. The service is available from LYRASIS or from 4Science via DuraCloud Europe.
DuraCloud is designed to meet the needs of cultural heritage institutions, with features including:
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Chronopolis Network Deposit Option
Chronopolis Deposit Process
Content is uploaded into the DuraCloud system via the DuraCloud SyncTool and is initially stored in Amazon Web Services S3 storage. This allows for initial checksums to be performed and for the client to stage and organize content prior to ingest into the Chronopolis system. An authorized administrative user initiates the ingest process, called the “snapshot.” clients are asked to move content from DuraCloud into the Chronopolis System within 3 months of upload or to pay the prorated cost $700/TB/year for the additional time client Content is stored in Amazon S3.
After the client initiates the Content and Data ingest process (i.e. the “snapshot”), client’s data will be stored in a digital preservation system of geographically distributed nodes, each managed using vendor supported software and hardware.The architecture of this system allows for the failure of an entire Chronopolis node with data still available and reliable at the other nodes.
Chronopolis Data Validation
All data in the system will be monitored for fixity using the Auditing Control Environment software (ACE). ACE is a system that incorporates a new methodology to address the integrity of long term archives using rigorous cryptographic techniques. ACE continuously audits the contents of the various objects according to the policy set by the archive, and provides mechanisms for an independent third-party auditor to certify the integrity of any object. ACE software is developed at University of Maryland’s Institute for Advanced Computing Studies, a Chronopolis partner.
Clients may also request information regarding integrity checks of the deposited data.
Preservation Actions and Chronopolis
Please note that Chronopolis does NOT perform specific “preservation actions” upon files during or after ingest. This includes actions such as file format migration, file normalization, file type verification, creation of descriptive metadata and rights management. If a client wishes to have these services, they need to be done by the client before client Content is deposited into Chronopolis.
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Video and Audio Streaming
DuraCloud from LYRASIS hosted hosted service spaces can be configured to enable streaming of the content stored in the space. When enabled, files can be streamed using the HLS the HLS streaming format. RTMP format is also available. Streaming can be used in either open or secure modes. Secure streaming requires an authenticated request to DuraCloud to retrieve a signed URL before the stream can be delivered. More details about media streaming in DuraCloud can be found here.
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Further Resources for Getting Started with Digital Preservation
We recommend The Executive Guide on recommend Digital Preservation Handbook for learning and sharing information about digital preservation at all levels of your organization.
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National Digital Stewardship Residency (NDSR)
DigiPres Commons
Digital Preservation Wikipedia project
Society of American Archivists - Digital Archives Specialist (DAS)
Educopia - Sustaining Digital Curation and Preservation Training