The TDL offers Digital Preservation Services to help Texas cultural heritage and scholarship stewards provide access to their treasures for the long term. TDL Digital Preservation Services include:
- Distributed Digital Preservation Storage with auditing
- Digital Preservation Consulting*
- Participation on Digital Preservation Services User Group
*Regular members who elect DP Services can schedule a full day of consultation with a digital preservation expert to prioritize content, plan workflows, and discuss related concerns.
Every digital preservation storage option begins with DuraCloud™.
TDL Members with both Digital Preservation and Repository services enabled, the following documentation describes the use of functionality that semi-automates the transfer of DSpace content to DuraCloud at TDL (and then into selected storage for preservation): Digital Preservation of DSpace Content
Preservation Storage Choices
- Digital Preservation with Chronopolis
- Digital Preservation with Amazon S3 Standard
- Digital Preservation with Glacier Flexible Retrieval
Comparison of storage choices
| Chronopolis | Amazon S3 Standard | Amazon Glacier Flexible Retrieval | |
|---|---|---|---|
| Digital Preservation Storage options via DuraCloud@TDL | Non-commercial, rooted in cultural heritage community | Commercial | Commercial |
Geographic Distribution | Three technologically diverse partner nodes: UCSD, TDL, UMIACS | Amazon East | Amazon East |
| File Fixity and Data Integrity | DuraCloud@TDL MD5 hashes on upload. Chronopolis checks SHA-256 hashes every 90 days or as specified by member, not to exceed 6 months. ACE audit tool creates and checks ‘tokens’ for data integrity. | DuraCloud@TDL MD5 hashes on upload. Amazon does some combination of MD5 hashes and cyclic redundancy checks (CRCs) with unspecified regularity, on upload, and when content is moved. | DuraCloud@TDL MD5 hashes on upload. Amazon does some combination of MD5 hashes and cyclic redundancy checks (CRCs) with unspecified regularity, on upload, and when content is moved. |