{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,28]],"date-time":"2025-10-28T00:31:23Z","timestamp":1761611483517,"version":"build-2065373602"},"reference-count":24,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2019,7,4]],"date-time":"2019-07-04T00:00:00Z","timestamp":1562198400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000208","name":"Institute of Museum and Library Services","doi-asserted-by":"publisher","award":["LG-71-17-0159-17"],"award-info":[{"award-number":["LG-71-17-0159-17"]}],"id":[{"id":"10.13039\/100000208","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Publications"],"abstract":"<jats:p>Memory institutions must be able to grow a fully-functional repository incrementally as collections grow, without expensive enterprise storage, massive data migrations, and the performance limits that stem from the vertical storage strategies. The Digital Repository at Scale that Invites Computation (DRAS-TIC) Fedora research project, funded by a two-year National Digital Platform grant from the Institute for Museum and Library Services (IMLS), is producing open-source software, tested cluster configurations, documentation, and best-practice guides that enable institutions to manage linked data repositories with petabyte-scale collections reliably. DRAS-TIC is a research initiative at the University of Maryland (UMD). The first DRAS-TIC repository system, named Indigo, was developed in 2015 and 2016 through a collaboration between U.K.-based storage company, Archive Analytics Ltd., and the UMD iSchool Digital Curation Innovation Center (DCIC), through funding from an NSF DIBBs (Data Infrastructure Building Blocks) grant (NCSA \u201cBrown Dog\u201d). DRAS-TIC Indigo leverages industry standard distributed database technology, in the form of Apache Cassandra, to provide open-ended scaling of repository storage without performance degradation. With the DRAS-TIC Fedora initiative, we make use of the Trellis Linked Data Platform (LDP), developed by Aaron Coburn at Amherst College, to add the LDP API over similar Apache Cassandra storage. This paper will explain our partner use cases, explore the system components, and showcase our performance-oriented approach, with the most emphasis given to performance measures available through the analytical dashboard on our testbed website.<\/jats:p>","DOI":"10.3390\/publications7030050","type":"journal-article","created":{"date-parts":[[2019,7,4]],"date-time":"2019-07-04T11:13:18Z","timestamp":1562238798000},"page":"50","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["DRAS-TIC Linked Data: Evenly Distributing the Past"],"prefix":"10.3390","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6591-6595","authenticated-orcid":false,"given":"Gregory","family":"Jansen","sequence":"first","affiliation":[{"name":"School of Information Studies, University of Maryland, College Park, MD 20742, USA"}]},{"given":"Aaron","family":"Coburn","sequence":"additional","affiliation":[{"name":"Information Technology Services, Amherst College, Amherst, MA 01002, USA"}]},{"given":"Adam","family":"Soroka","sequence":"additional","affiliation":[{"name":"Office of the CIO, The Smithsonian Institution, Washington, DC 20002, USA"}]},{"given":"Will","family":"Thomas","sequence":"additional","affiliation":[{"name":"School of Information Studies, University of Maryland, College Park, MD 20742, USA"}]},{"given":"Richard","family":"Marciano","sequence":"additional","affiliation":[{"name":"School of Information Studies, University of Maryland, College Park, MD 20742, USA"}]}],"member":"1968","published-online":{"date-parts":[[2019,7,4]]},"reference":[{"key":"ref_1","unstructured":"Institute of Museum and Library Services (2019, February 28). National Digital Platform Research Grant LG-71-17-0159-17, Available online: https:\/\/www.imls.gov\/grants\/awarded\/lg-71-17-0159-17."},{"key":"ref_2","unstructured":"(2019, February 28). The Digital Curation Innovation Center Website. Available online: https:\/\/dcic.umd.edu."},{"key":"ref_3","unstructured":"(2019, February 28). The Fedora 5.0 API Specification. Available online: https:\/\/fedora.info\/2018\/11\/22\/spec\/."},{"key":"ref_4","unstructured":"(2019, February 28). The Trellis Cassandra Software Project. Available online: https:\/\/github.com\/trellis-ldp\/trellis-cassandra."},{"key":"ref_5","unstructured":"(2019, February 28). The Trellis Linked Data Platform Project Website. Available online: https:\/\/www.trellisldp.org\/."},{"key":"ref_6","unstructured":"(2019, February 28). The Apache Cassandra Software Project Website. Available online: https:\/\/cassandra.apache.org\/."},{"key":"ref_7","unstructured":"(2019, February 28). The DRAS-TIC Indigo Repository Software Project. Available online: https:\/\/github.com\/UMD-DRASTIC\/drastic."},{"key":"ref_8","unstructured":"(2019, February 28). The DRAS-TIC Project Website. Available online: http:\/\/drastic-testbed.umd.edu."},{"key":"ref_9","unstructured":"(2019, February 28). \u201cSwarm Mode Overview\u201d, Docker Documentation Guide. Available online: https:\/\/docs.docker.com\/engine\/swarm\/."},{"key":"ref_10","unstructured":"(2019, February 28). Gatling.io Open Source Documentation. Available online: https:\/\/gatling.io\/docs\/current\/."},{"key":"ref_11","unstructured":"(2019, February 28). Logstash 6.6 Product Documentation. Available online: https:\/\/www.elastic.co\/guide\/en\/logstash\/current\/index.html."},{"key":"ref_12","unstructured":"(2019, February 28). Grafana Company Website. Available online: https:\/\/grafana.com\/."},{"key":"ref_13","unstructured":"(2019, February 28). The Fedora Commons Repository 5.0.2 Software Implementation. Available online: https:\/\/github.com\/fcrepo4\/fcrepo4\/tree\/fcrepo-5.0.2."},{"key":"ref_14","unstructured":"(2019, February 28). The JBoss ModeShape Website. Available online: http:\/\/modeshape.jboss.org\/."},{"key":"ref_15","unstructured":"(2019, February 28). Fedora Modeshape with Filesystem and 2 Test Workers. Available online: http:\/\/drastic-testbed.umd.edu:3000\/dashboard\/snapshot\/bYsCpBWP20xmyXkb3CW4x7qMYx7rW4L5."},{"key":"ref_16","unstructured":"(2019, February 28). Fedora Modeshape with PostgreSQL and 2 Test Workers. Available online: http:\/\/drastic-testbed.umd.edu:3000\/dashboard\/snapshot\/cLG3Arsqs1PtVbGUPshhpcCbOUFmftWE."},{"key":"ref_17","unstructured":"(2019, February 28). Trellis LDP with PostgreSQL and 16 Test Workers. Available online: http:\/\/drastic-testbed.umd.edu:3000\/dashboard\/snapshot\/Re0RiG2dgPbuUBYG7DICAygBQiis4o61."},{"key":"ref_18","unstructured":"(2019, February 28). Trellis LDP with Cassandra and 24 Test Workers. Available online: http:\/\/drastic-testbed.umd.edu:3000\/dashboard\/snapshot\/fdV15D6HjP7kjN7wNbonSwUr3TiC6ohI."},{"key":"ref_19","unstructured":"(2019, February 28). Trellis LDP with Cassandra and 28 Test Workers. Available online: http:\/\/drastic-testbed.umd.edu:3000\/dashboard\/snapshot\/bYsCpBWP20xmyXkb3CW4x7qMYx7rW4L5."},{"key":"ref_20","unstructured":"(2019, February 28). The Java Content Repository (JCR) Java Specification Request (JSR-283). Available online: https:\/\/www.jcp.org\/en\/jsr\/detail?id=283."},{"key":"ref_21","unstructured":"(2019, February 28). The Kubernetes Website. Available online: https:\/\/kubernetes.io\/."},{"key":"ref_22","unstructured":"(2019, February 28). The Amazon AWS Lambda Website. Available online: https:\/\/aws.amazon.com\/lambda\/."},{"key":"ref_23","unstructured":"Tanenbaum, A.S., and van Steen, M. (2019, February 28). Distributed Systems: Principles and Paradigms. Available online: http:\/\/barbie.uta.edu\/~jli\/Resources\/MapReduce&Hadoop\/Distributed%20Systems%20Principles%20and%20Paradigms.pdf."},{"key":"ref_24","unstructured":"(2019, February 28). How Are Write Requests Accomplished?. Available online: https:\/\/docs.datastax.com\/en\/cassandra\/3.0\/cassandra\/dml\/dmlClientRequestsWrite.html."}],"container-title":["Publications"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2304-6775\/7\/3\/50\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:02:24Z","timestamp":1760187744000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2304-6775\/7\/3\/50"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,7,4]]},"references-count":24,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2019,9]]}},"alternative-id":["publications7030050"],"URL":"https:\/\/doi.org\/10.3390\/publications7030050","relation":{},"ISSN":["2304-6775"],"issn-type":[{"type":"electronic","value":"2304-6775"}],"subject":[],"published":{"date-parts":[[2019,7,4]]}}}