Abstract
The dCache project provides open source storage software deployed internationally to satisfy ever more demanding scientific storage requirements. Its multifaceted approach provides an integrated way of supporting different use cases with the same storage, from high throughput data ingest, through wide access and easy integration with existing systems. In supporting new communities, such as photon science and microbiology, dCache is evolving to provide new features and access to new technologies. In this paper, we describe some of these recent features that facilitate the use of storage to maximise the gain from stored data, including quality-of-service management, support for distributed and federated systems, and improvements with support for parallel NFS (pNFS).
Highlights
The dCache project started in 2000 as a collaboration between Deutsches ElektronSynchrotron (DESY) and Fermilab National Laboratory
A POSIX compliant namespace and the clean separation between that namespace and the location of file's data meant that various operator interventions were possible without requiring a downtime, and that the failure of some storage node resulted in the unavailability of only data stored exclusively on that node
The countries contributing to Nordic Data Grid Federation (NDGF) wished to collaborate in providing a geographically distributed Tier-1 centre that would accept data provided any institute in any country is running
Summary
The dCache project started in 2000 as a collaboration between Deutsches ElektronSynchrotron (DESY) and Fermilab National Laboratory. The countries contributing to NDGF wished to collaborate in providing a geographically distributed Tier-1 centre that would accept data provided any institute in any country is running From its earliest versions forward, dCache has responded to the challenges presented by new user communities and new ways of working, developing and adopting innovative solutions aimed at satisfying the demands for increased productivity[3]. Such changes included added support for different network protocols (including GridFTP, SRM and HTTP/WebDAV, and multiple authentication schemes (X.509, Kerberos, username+password, OpenID-Connect)
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