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DTSTAMP:20211207T054806Z
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UID:submissions.supercomputing.org_SC21_sess158_pap169@linklings.com
SUMMARY:DeltaFS: A Scalable No-Ground-Truth Filesystem For Massively-Paral
 lel Computing
DESCRIPTION:Paper\n\nDeltaFS: A Scalable No-Ground-Truth Filesystem For Ma
 ssively-Parallel Computing\n\nZheng, Cranor, Ganger, Gibson, Amvrosiadis..
 .\n\nHigh-Performance Computing (HPC) is known for its use of massive conc
 urrency. But it can be challenging for a parallel filesystem's control pla
 ne to utilize cores when every client process must globally synchronize an
 d serialize its metadata mutations with those of other clients. We present
  DeltaFS, a new paradigm for distributed filesystem metadata.\n\nDeltaFS a
 llows jobs to self-commit their namespace changes to logs, avoiding the co
 st of global synchronization. Followup jobs selectively merge logs produce
 d by previous jobs as needed, a principle we term No Ground Truth which al
 lows for efficient data sharing. By avoiding unnecessary synchronization o
 f metadata operations, DeltaFS improves metadata operation throughput up t
 o 98x leveraging parallelism on the nodes where job processes run. This sp
 eedup grows as job size increases. DeltaFS enables efficient inter-job com
 munication, reducing overall workflow runtime by significantly improving c
 lient metadata operation latency up to 49x and resource usage up to 52x.\n
 \nTag: Reproducibility Badge, Cloud and Distributed Computing, File System
 s and I/O, Storage\n\nRegistration Category: Tech Program Reg Pass\n\nAwar
 d Finalist: Best Student Paper Finalists\n\nReproducibility Badges: Artifa
 ct Available, Artifact Functional
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