Quota management in dCache or making a perfectly normal file system normal

Conference · Fri Jan 26 04:00:00 EST 2024

OSTI ID:2283688

Litvintsev, Dmitry ^[1]; Krishnaveni, Chitrapu ^[2]; Meyer, Svenja ^[3]; Millar, Paul ^[3]; Mkrtchyan, Tigran ^[1]; Morschel, Lea ^[3]; Rossi, Albert ^[1]; Sahakyan, Marina ^[3]

---

1. Fermilab
2. Linkoping U.
3. DESY

dCache (https://dcache.org) is a highly scalable storage system providing location-independent access to data. The data are stored across multiple data servers as complete files presented to the end-user via a single-rooted namespace. From its inception, dCache has been designed as a caching disk buffer to a tertiary tape storage system with the assumption that the latter has virtually unlimited capacity. dCache can also be configured as a disk-only storage system with no tape backend. Owing to the idea that a tape resource is infinite, or purely physically limited by budget considerations, the system has never provided for any restrictions on how much data can be stored on tape. Likewise, in the disk-only configuration, the capacity of the system is only limited by the aggregate disk capacity of the data servers. In a multi-user environment, however, this has become problematic. This presentation will describe the design and implementation of a user- and group-based quota system, that allows to manage tape and disk space allocations, as part of dCache namespace.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 2283688
• Report Number(s): FERMILAB-CONF-23-530-CSAID; arXiv:2401.14983; oai:inspirehep.net:2751910
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS