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Record W1924303716 · doi:10.1109/ccece.2001.933718

Scalability of computer clusters

2002· article· en· W1924303716 on OpenAlex
Vu Anh Nguyen, Samuel Pierre

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

Venuenot available
Typearticle
Languageen
FieldComputer Science
TopicAdvanced Data Storage Technologies
Canadian institutionsPolytechnique Montréal
Fundersnot available
KeywordsComputer scienceScalabilityVirtual file systemFile systemNetwork File SystemComputer clusterNode (physics)Distributed computingOperating systemSelf-certifying File System

Abstract

fetched live from OpenAlex

For this study, we have chosen to work with Parallel Virtual File System (PVFS) from Clemson University; it is a distributed file system for Linux that implements wide stripping. First, we have programmed and calibrated a PVFS simulator; using this simulator, we demonstrated that PVFS has a very good scalability where the number of nodes in the cluster is smaller than a given threshold. This threshold actually corresponds to the saturation of the network bandwidth. To go beyond this limit, we propose to use wide striping and replication in the same file system. We also propose a new data distribution technique based upon "chained declustering", that warranties high availability and scalability. This also allow's the system to be improved with minimal cost, without service interruption and with a minimal degradation of service. In addition, the granularity of the file system is ideal: the size of the cluster can be adjusted to the needed performances with a precision of one node. Finally, we propose a complete architecture, using cluster of clusters, where the performances are not limited by the network performances. In order to validate our file system, we use the PVFS simulator where the improvements have been implemented. The results show that the performances of the system are close to the ideal case. Once the size of the origin cluster is well defined, the total number of nodes in the system is not limited any more, and the performances increase linearly. We have also simulated an upgrade of the system, in order to measure the perturbation caused by the update of the new nodes: it is minimal and can be controlled by priority mechanisms.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: none
Teacher disagreement score0.952
Threshold uncertainty score0.209

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.001
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.023
GPT teacher head0.236
Teacher spread0.213 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Quick stats

Citations2
Published2002
Admission routes1
Has abstractyes

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