Merritt Digital Preservation Repository – May 2025

May 30, 2025 Author: Eric LopatinCategories:

Merritt is a digital preservation repository from the University of California Curation Center (UC3) that enables the UC community to manage, archive, and share its valuable digital content.

Welcome to the Merritt service update for May 2025

Content and Collections

New Collections

UC Santa Cruz Library continues work on its long-running AV digitization project with several new collections that were established in Merritt this month:

Catherine Steele papers MS030
Lou Harrison Papers MS132
Marion Patterson Interviews MS424
UCSC Women of Color Research Cluster records UA098
Bert Kaplan UCSC audio and visual recorded lectures collection UA099
Stevenson College records UA102
Hayden White Papers MS323
Donna Haraway Papers UA042
Shmuel Thaler Photographs MS21

Digital Preservation Community

European Open Science Cloud (EOSC) EDEN Project Launches a new Digital Preservation Survey

The EOSC EDEN project recently launched a survey focused on digital preservation practices across the global community. In their words, “We are keen to understand the existing frameworks, guidelines and practices for identification, selection and appraisal of data for ‘long-term’ preservation – and what ‘long term’ means in different organisational and professional settings.” The survey is open until June 30, 2025. You can learn more about the project on the EDEN site.

CoreTrustSeal v04.00 Requirements

CoreTrustSeal (CTS) is looking for input for their next revision of certification Requirements via the CTS Assembly of Reviewers. The forthcoming, revised requirements will take effect during 2026-2028. As part of the Assembly, a member of the Merritt team will be providing input on the associated CTS survey. If you’re curious to have a look at the current requirements, they are available here.

What We’re Working On

The Merritt user interface now makes available additional fixity check information on a per-object basis. On any object landing page, click the “JSON version” link to the right of the breadcrumb trail under the object’s ARK. This results in polling the object_info endpoint. At the bottom of the JSON that’s returned is a fixity section which notes the latest fixity check status provided by Merritt’s Audit service at each cloud storage node. A unique_file_count is also provided to match against the file count displayed per node. If you have any questions about this new functionality, feel free to reach out to our team! Swagger documentation for the endpoint, as well as the local_id_search endpoint, which also provides this data is available.

Repository Metrics for March

Holdings Snapshot

Holdings as of July 1, 2024, fiscal year start:	468.8 TB (one copy)
Holdings as of May 30, 2025	577.73 TB (one copy)
Holdings as of March 27, 2025	564.84 TB
Holdings as of February 27, 2025	536.42 TB
Holdings as of January 30, 2025	509.96 TB
Holdings as of October 30, 2024	492.02 TB
Holdings as of September 27, 2024	489.33 TB
Holdings as of August 29, 2024	471.27 TB
Holdings as of July 30, 2024	470.19 TB

Active collections in May (new files added – a single digital object can contain one or more files):

eScholarship	250,622
University and Jepson Herbaria Image Archive	3,285
UC Berkeley Library Librettos Collection	52,972
UC Berkeley Library Map Collection	7,626
UC Berkeley Library Humanities & Social Sciences	10,841
UC Irvine Library Jacques Derrida Papers	6,142
UCSC Library Cabrillo Music Festival Collection	3,102