Preprint

PUBDB-2024-00636

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Quota management in dCache or making a perfectly normal file system normal

Litvintsev, D. (Corresponding author) ; Krishnaveni, C. ; Meyer, S.DESY* ; Millar, P.DESY* ; Mkrtchyan, T. ; Morschel, L.DESY* ; Rossi, A. ; Sahakyan, M.DESY*

2024

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Please use a persistent id in citations: doi:10.3204/PUBDB-2024-00636

Report No.: FERMILAB-CONF-23-530-CSAID; arXiv:2401.14983

Abstract: 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.

Note: 26th Intl Conf Computing High Energy & Nuclear Phys (CHEP 2023)

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Contributing Institute(s):

1. Informationstechnologie (IT)

Research Program(s):

1. 623 - Data Management and Analysis (POF4-623) (POF4-623)

Experiment(s):

1. DESY: TIER-II

Appears in the scientific report 2024

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