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Merritt Digital Preservation Repository – April 2023

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 April 2023

New Content and Collections 

The COVID Tracking Project Archive at UCSF 

Over the past two months our team has been collaborating with UCSF Archives & Special Collections to manage the ingest of the COVID Tracking Project (CTP) Archive into Merritt. The CTP was “a volunteer organization launched from The Atlantic and dedicated to collecting and publishing the data required to understand the COVID-19 outbreak in the United States.” Alongside the wealth of data from the CTP that has been made openly accessible through Dryad, we are now pleased to say the born digital content captured and created by the project will reside in an associated Merritt collection. We look forward to our continued work with UCSF to ensure the completion of this collection in the upcoming months.

Digital Preservation Community

Nearly all digital preservation repository platforms, including Merritt, reference the Open Archival Information System (OAIS) model. The latest version of the model is now undergoing its periodic review by ISO. As in the past, this revision was brought forth by the Consultative Committee for Space Data Systems (CCSDS), from which the OAIS originates. Notably, OAIS plays a major role in ISO 16363, one of a limited number of audit standards purposed to certify the trustworthiness of digital preservation repositories.

As mentioned in the March update, the Library of Congress held its annual Designing Storage Architectures meeting on March 27-28. Presentations from the meeting are now available.

What We’re Working On

The Merritt team has authored a post on its recent CoreTrustSeal certification!

As part of our collaboration with UCSF on the CTP Archive, we have worked to enable the direct download of content from BOX to a staging area where it can then be ingested into Merritt. We have an initial implementation in place that is enabling us to download a significant number of images that will then be compressed and associated with metadata for ingest.

Repository Metrics for April

Holdings Snapshot
Holdings as of July 1, 2022, fiscal year start: 328.61 T TB (one copy)
Holdings as of April 28, 2023 431.34 TB (one copy)
Holdings as of March 24, 2023 425.50 TB
Holdings as of January 27, 2023 411.54 TB
Holdings as of November 30, 2022 395.85 TB
Holdings as of October 31, 2022 390.99 TB 
 Holdings as of September 26, 2022 378.30 TB 
Holdings as of August 30, 2022: 374.21 TB 
Holdings as of July 28, 2022: 346.67 TB 
Active collections in April (new files added – a single digital object can contain one or more files):
eScholarship 161,868
Dryad 42,383
Palestinian Museum Collection 21,325
UCI Library ETD 158
UCSD Library ETD 282
The COVID Tracking Project Archive 32,541

Learn more about Merritt and the team that’s advancing CDL’s digital preservation repository.

Merritt on

Merritt Policies and User Guidelines

Merritt User Documentation

New Collection Intake Form


Merritt Preservation Repository

Find the team on GitHub!

Terrence Brady Senior Developer and Technical Lead

David Loy Senior Developer

Mark Reyes Senior Developer

Eric Lopatin Merritt Product Manager (at CDL)

Contact Us

Merritt administrators may be contacted at, which automatically opens in a new issue in CDL’s internal ticketing system.

To report an urgent problem with Merritt, call the CDL Help Line at (510) 987-0555.