Digital Preservation Services

The TDL offers Digital Preservation Services to help Texas cultural heritage and scholarship stewards provide access to their treasures for the long term through direct consulting, training at all levels, and workflow support that includes the right combination of technologies for your unique content needs.

Every digital preservation storage option begins with DuraCloud™ @TDL.

Preservation Storage Choices

  • Digital Preservation with DPN
  • Digital Preservation with Chronopolis
  • Digital Preservation with Amazon S3
  • Digital Preservation with Glacier
Digital Preservation Storage options via DuraCloud@TDL

Chronopolis

DPN

Amazon S3

Glacier

Non-commercial, rooted in cultural heritage community Non-commercial, rooted in cultural heritage community Commercial Commercial

Geographic Distribution

Any three from the following technologically diverse partner nodes: UCSD, TDL, UMIACS, and NCAR Any three from the following technologically diverse partner nodes: HathiTrust, APTrust, Chronopolis, Texas Preservation Node (TPN) Amazon East Amazon East

File Fixity and Data Integrity

DuraCloud@TDL MD5 hashes on upload.

Chronopolis checks SHA-256 hashes and tokens every 45 days or as specified by member, not to exceed 6 months.

Fixity check type varies per node.

DuraCloud@TDL MD5 hashes on upload.

The Texas Preservation Node (TPN) creates SHA-256 hashes which are checked at least once per year.

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.