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Global LOCKSS Network

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Global LOCKSS Network logo

Local preservation of electronic journals and books for post-cancellation access, post-disappearance access, and failover access, at 80 libraries and counting.

For Libraries For Publishers Contact

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13,200 journals and serials

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23,600 books and monographs

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80 research libraries and public libraries

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740 publishers and societies

LOCKSS logo

Open source, secure, trusted

Keepers logo

Keepers archive


For Libraries

How Does It Work for Libraries?

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Set up your GLN node. Install and configure the LOCKSS software on premises on a Linux host (virtual machine, physical server, or desktop computer), using library-owned storage (locally-attached or locally-networked). Don't worry, white glove technical support is included!

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Select content to preserve. In your GLN node's Web user interface, choose content to preserve from an ever-growing catalog of participating publishers (open access content, or subscription content you subscribe to). Available to members: live user training.

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That's it! Content is harvested, audited and preserved locally. Your GLN node harvests the selected content from the publisher's Web site onto your local storage, keeps auditing it against nodes at other member libraries over time, and if ever needed, gets repairs from the original site or from trusted nodes.

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Value Proposition for Libraries

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GLN membership is a big deal for your library beyond the range of benefits and support it affords:

  • Custody of the scholarly record on library-owned storage, not in the cloud. Your GLN node keeps durable, validated digital copies of serials and monographs in the one place they will always be accessible to your users: the library.
  • Digital preservation by libraries, not by vendors. The GLN operates around the world, and around the clock, to check and repair stored content. Member libraries work together to ensure that the scholarly record stays intact, authentic, and accessible.
  • Post-cancellation access in-house. No one likes to cancel a journal subscription, but it happens. GLN membership lets you keep access to all of the content you have already paid for, even after you are no longer a subscriber, without a third-party intermediary.
  • Post-disappearance access and failover access. Researchers enjoy seamless, uninterrupted access to your subscription content, no matter the status of the publisher's Web site. If the site is gone or unreachable, your users won't even notice.
  • At-risk journals and books. In addition to commercial scholarly publishing, the GLN specializes in bringing at-risk scholarship to the best stewards: librarians. This includes open access journals and books from all disciplines all over the world, which are often not preserved broadly1,2.
  • Support included at every level. GLN membership opens the door to the LOCKSS Program's staff for technical support, including hardware procurement, installation, configuration, user training, and more -- whether you have an institutional IT department or not.

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Benefits and Support

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GLN membership grants libraries access to an array of benefits and support:

  • Growing catalog of preservable scholarly content. Over 13,200 journals and serials and 23,600 books and monographs from 740 publishers and societies.
  • In-house post-cancellation access, post-disappearance access, and failover access. Scholars at your institution can access locally preserved content that the library no longer subscribes to, has disappeared from the Web, or is temporarily unreachable.
  • White glove technical support. Personable help with installation, configuration, maintenance, troubleshooting, and integration, via e-mail, phone, or video conference. 
  • Live user training. Helping library and IT staff learn about the LOCKSS software, when your organization joins and whenever someone new joins your organization.
  • Provisioning and procurement assistance. We work with library and IT staff to help you acquire and/or set up a GLN node fit for your technology environment.
  • Community. Documentation, wiki, discussions, special interest groups, and more, as part of a network of 80 partner libraries.

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Library Pricing

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Annual GLN membership fees depend on your library materials budget (13 tiers) and your geographical location (6 zones). Please contact us for consortial discounts and multi-year discounts. Fees cover a membership benefits and technical support, and as noted below, the cost of processing an ever-growing and ever-evolving corpus of Web-based content into the network.

Library materials budget

Zone 1

Zone 2

Zone 3

Zone 4

Zone 5

Zone 6

< USD 1 million

USD 520

USD 416

USD 260

USD 104

USD 52

USD 26

USD 1-2 million

USD 690

USD 552

USD 345

USD 138

USD 69

USD 35

USD 2-3 million

USD 1,380

USD 1,104

USD 690

USD 276

USD 138

USD 69

USD 3-4 million

USD 2,080

USD 1,664

USD 1,040

USD 416

USD 208

USD 104

USD 4-5 million

USD 2,770

USD 2,216

USD 1,385

USD 554

USD 277

USD 139

USD 5-7 million

USD 3,460

USD 2,768

USD 1,730

USD 692

USD 346

USD 173

USD 7-9 million

USD 4,835

USD 3,868

USD 2,418

USD 967

USD 484

USD 242

USD 9-11 million

USD 6,225

USD 4,980

USD 3,113

USD 1,245

USD 623

USD 311

USD 11-13 million

USD 7,610

USD 6,088

USD 3,805

USD 1,522

USD 761

USD 381

USD 13-15 million

USD 8,995

USD 7,196

USD 4,498

USD 1,799

USD 900

USD 450

USD 15-20 million

USD 10,370

USD 8,296

USD 5,185

USD 2,074

USD 1,037

USD 519

USD 20-25 million

USD 13,830

USD 11,064

USD 6,915

USD 2,766

USD 1,383

USD 692

> USD 25 million

USD 17,295

USD 13,836

USD 8,648

USD 3,459

USD 1,730

USD 865

Logo of the CLOCKSS Archive, consisting of an analog clock design showing approximately 10:10 o'clock and an infinity sign where the 3 should be, next to the work mark "CLOCKSS"

Special offer. As complementary offerings, the GLN and CLOCKSS are joining forces to offer GLN members the ability to become CLOCKSS supporting libraries for only 10% more. Read more about the benefits of CLOCKSS and the CLOCKSS value proposition for libraries.

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Libraries' Frequently Asked Questions

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  • How much local storage is needed to participate in the GLN? The totality of the GLN's holdings over 20+ years in operation is 45 to 50 TB of stored content, but not every resource is still preservable today and not every library subscribes to everything preservable. We recommend 30 to 40 TB depending on your library's subscriptions.
  • How much does hardware and storage cost, if not provided by my local IT department? The LOCKSS Program's GLN staff can help you with hardware and storage procurement. To give a quick estimate, a basic GLN-ready server with a 40 TB capacity and a 5-year warranty for an expected 5-year service life starts at about USD 3,500 before taxes and shipping, which is equivalent to only USD 700 per year or just USD 17.50 per terabyte per year.
  • Can a desktop computer be used, in lieu of a physical server or virtual machine? Yes. If you do not have access to an IT server room, the LOCKSS Program's GLN staff can work with you to dedicate a suitable desktop computer to being a GLN node appliance.
  • If the LOCKSS software is open source and free, why are there GLN membership fees? The LOCKSS Program takes pride in making the GLN and all our projects and partnerships the most economical digital preservation solutions in the world. The software is free, but processing publisher content (both content from newly participating publishers and new content from already participating publishers) to make it available for preservation in the GLN, and developing and maintaining publisher-specific software needed to keep up with ever-changing publisher Web sites and publishing platforms, takes our staff of 13 work year-round. See the benefits and support afforded by GLN membership. 
  • What is the difference between LOCKSS and CLOCKSS? CLOCKSS is a digital archive, and LOCKSS is the digital preservation software system used to secure and preserve its holdings.
  • What is the difference between the GLN and CLOCKSS? The GLN and CLOCKSS are complementary initiatives, both using LOCKSS digital preservation software system to preserve the scholarly record. The GLN delivers post-disappearance access, failover access, and post-cancellation access at a local scale, while CLOCKSS ensures the long-term survival of the scholarly record at a global scale. Joint participation in the GLN and CLOCKSS supports a comprehensive digital preservation strategy for libraries, and is offered at a deep discount.

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For Publishers

Calls to Action for Publishers

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These three alarming statistics on the state of digital preservation of the scholarly record in 2024 should be a wake-up call for scholarly publishers to participate in the GLN as part of their digital preservation strategy:

Keepers logo

76% of online resources tracked by the ISSN network are not preserved in any Keepers archive like the GLN, while 19% are preserved in just one or two; less than 6% are preserved in three or more1.

Crossref logo

33% of Crossref members do not preserve their content in any recognized archive like the GLN; 58% only preserve their content at the Bronze level, 8.5% at the Silver level, and less than 1% at the Gold level2.

DOI logo

Only 58% of DOIs are preserved in at least one recognized archive like the GLN, while 28% are not preserved in any2.

How Does It Work for Publishers?

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Accept your invitation to participate. GLN libraries nominate high-quality scholarly content, both subscription and open access, for preservation in the network. Not invited yet? Contact the LOCKSS Program's GLN staff to discuss your eligibility.

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Prepare your site for Web harvest. The LOCKSS Program's GLN staff will work with your technology team to conduct an audit of your Web platform and recommend preservability improvements. Once implemented, we will customize the LOCKSS software to make your content available for preservation in the GLN.

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That's it! Your content is securely preserved at libraries worldwide. Each member library runs the LOCKSS software on a local GLN node, which harvests content from your Web site, keeps auditing it against nodes at other member libraries over time, and if ever needed, gets repairs from you or from trusted nodes.

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Value Proposition for Publishers

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  • Trusted and secure. The GLN uses the same open source LOCKSS technology that secures CLOCKSS, the only repository to receive a perfect score for Technologies, Technical Infrastructure, and Security from a CRL TRAC audit3. The LOCKSS software securely ensures the integrity of preserved content using a peer-reviewed, subversion- and exfiltration-resistant, audit-and-repair protocol.
  • Your publishing platform is your preservation pipeline. GLN nodes harvest content directly from your Web site. If you publish it, the GLN will preserve it without the need for separate packaging and delivery workflows for preservation.
  • Up to 80 preserved copies, none in the cloud. GLN participation makes preservation of the scholarly record the shared effort between publishers and libraries it is supposed to be. Your content stays only where you want it: with your paying subscribers.
  • Verifiable by libraries. Participating in the GLN means scholars and subscribers can verify your commitment to preservation via the ISSN Portal. The GLN discloses preservation practices and provides regular holdings reports to the Keepers registry, so your contributions really count.
  • Go for the gold. If you are not in the 1% of Crossref members preserving their content at the Gold level -- or worse, if you are among the 33% of Crossref members whose content is not currently preserved in any archive -- participating in the GLN will help you progress to Bronze, Silver, or Gold2. Bonus: CLOCKSS and the GLN use the same LOCKSS technology and work closely together, so you could be on your way to Gold even faster by participating in both archives for the same amount of effort.

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LOCKSS-Ready Publishing Platforms

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Many publishing platforms are LOCKSS-ready for turnkey participation in the GLN, including:

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Publishers' Frequently Asked Questions

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  • Under what circumstances do users access content preserved in the GLN? A member library's GLN node substitutes its preserved copy of a given URL only if the user request to your Web site fails, if your site is gone forever (post-disappearance access), is temporarily unavailable (failover access), or indicates that the requesting IP address no longer has a subscription (post-cancellation access). This access functionality is only available to qualified local users of the member library (for instance, students on campus at a university or patrons on site at a public library). There is no external access or republishing mechanism.
  • Who ensures that only subscribers can harvest content publishers make available for preservation in the GLN? You do, via your Web site's own access controls: each member library's GLN node crawls content from your Web site from an IP address in its institution's subscription range.
  • Is it possible to allow only some GLN member libraries to preserve content in the GLN? Yes, although this is uncommon. Making your Web site LOCKSS-compatible involves a simple machine-readable permission statement, which you are able to implement conditionally if needed.
  • What is the difference between LOCKSS and CLOCKSS? CLOCKSS is a digital archive, and LOCKSS is the digital preservation software system used to secure and preserve its holdings.
  • What is the difference between the GLN and CLOCKSS? The GLN and CLOCKSS are complementary initiatives, both using LOCKSS technology to preserve the scholarly record. The GLN delivers post-disappearance access, failover access, and post-cancellation access at a local scale, while CLOCKSS ensures the long-term survival of the scholarly record at a global scale. Joint participation in the GLN and CLOCKSS supports a comprehensive digital preservation strategy for publishers.

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Learn More

Further Reading

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  1. As of 2024-06-03, the ISSN network tracks 381,817 online resources. Of these, 93,042 are preserved in at least one Keepers archive like the GLN, meaning 288,775 (75.6%) are not preserved in any; 70,753 (18.5%) are preserved in just one or two, while only 22,287 (5.84%) are preserved in three or more. Explore Keepers Statistics
  2. According to a 2024 study of 7,438,037 DOIs, only 58.4% (4,342,368) were preserved in at least one recognized archive like the GLN, while 27.6% (2,056,492) were not preserved in any. The study found that among Crossref members, 32.9% (6,982) do not preserve their content in any recognized archive like the GLN, while 57.7% (12,257) only preserve their content at the Bronze level (over 25% of their content in at least one archive), 8.5% (1,797) at the Silver level (over 50% of their content in at least two archives), and 0.96% (204) at the Gold level (over 75% of their content in at least three archives). Read "Digital Scholarly Journals Are Poorly Preserved: A Study of 7 Million Articles" by Martin Paul Eve (2024), Journal of Librarianship and Scholarly Communication 12(1), DOI: 10.31274/jlsc.16288
  3. In 2018, the Center for Research Libraries' Trustworthy Repositories Audit & Certification (TRAC) audit awarded CLOCKSS 5 out of 5 on Technologies, Technical Infrastructure, and Security. Read the 2018 CLOCKSS Audit Report

Figures as of 2024-06-03 unless otherwise noted. Logos by their respective organizations. Icons by OpenMoji (CC BY-SA 4.0).