---
_id: '62981'
abstract:
- lang: eng
  text: "Otus is a high-performance computing cluster that was launched in 2025 and
    is operated by the Paderborn Center for Parallel Computing (PC2) at Paderborn
    University in Germany. The system is part of the National High Performance Computing
    (NHR) initiative. Otus complements the previous supercomputer Noctua 2, offering
    approximately twice the computing power while retaining the three node types that
    were characteristic of Noctua 2: 1) CPU compute nodes with different memory capacities,
    2) high-end GPU nodes, and 3) HPC-grade FPGA nodes. On the Top500 list, which
    ranks the 500 most powerful supercomputers in the world, Otus is in position 164
    with the CPU partition and in position 255 with the GPU partition (June 2025).
    On the Green500 list, ranking the 500 most energy-efficient supercomputers in
    the world, Otus is in position 5 with the GPU partition (June 2025).\r\n\r\n\r\nThis
    article provides a comprehensive overview of the system in terms of its hardware,
    software, system integration, and its overall integration into the data center
    building to ensure energy-efficient operation. The article aims to provide unique
    insights for scientists using the system and for other centers operating HPC clusters.
    The article will be continuously updated to reflect the latest system setup and
    measurements. "
author:
- first_name: Sadaf
  full_name: Ehtesabi, Sadaf
  id: '116116'
  last_name: Ehtesabi
- first_name: Manoar
  full_name: Hossain, Manoar
  id: '114619'
  last_name: Hossain
  orcid: https://orcid.org/0000-0002-0737-7981
- first_name: Tobias
  full_name: Kenter, Tobias
  id: '3145'
  last_name: Kenter
- first_name: Andreas
  full_name: Krawinkel, Andreas
  id: '15275'
  last_name: Krawinkel
- first_name: Lukas
  full_name: Ostermann, Lukas
  id: '69976'
  last_name: Ostermann
- first_name: Christian
  full_name: Plessl, Christian
  id: '16153'
  last_name: Plessl
  orcid: 0000-0001-5728-9982
- first_name: Heinrich
  full_name: Riebler, Heinrich
  id: '8961'
  last_name: Riebler
- first_name: Stefan
  full_name: Rohde, Stefan
  id: '34009'
  last_name: Rohde
- first_name: Robert
  full_name: Schade, Robert
  id: '75963'
  last_name: Schade
  orcid: 0000-0002-6268-5397
- first_name: Michael
  full_name: Schwarz, Michael
  id: '5312'
  last_name: Schwarz
- first_name: Jens
  full_name: Simon, Jens
  id: '15273'
  last_name: Simon
- first_name: Nils
  full_name: Winnwa, Nils
  id: '61189'
  last_name: Winnwa
- first_name: Alex
  full_name: Wiens, Alex
  id: '23522'
  last_name: Wiens
  orcid: 0000-0003-1764-9773
- first_name: Xin
  full_name: Wu, Xin
  id: '77439'
  last_name: Wu
citation:
  ama: Ehtesabi S, Hossain M, Kenter T, et al. <i>Otus Supercomputer</i>. Vol 1. Paderborn
    Center for Parallel Computing (PC2); 2025. doi:<a href="https://doi.org/10.48550/ARXIV.2512.07401">10.48550/ARXIV.2512.07401</a>
  apa: Ehtesabi, S., Hossain, M., Kenter, T., Krawinkel, A., Ostermann, L., Plessl,
    C., Riebler, H., Rohde, S., Schade, R., Schwarz, M., Simon, J., Winnwa, N., Wiens,
    A., &#38; Wu, X. (2025). <i>Otus Supercomputer</i> (Vol. 1). Paderborn Center
    for Parallel Computing (PC2). <a href="https://doi.org/10.48550/ARXIV.2512.07401">https://doi.org/10.48550/ARXIV.2512.07401</a>
  bibtex: '@book{Ehtesabi_Hossain_Kenter_Krawinkel_Ostermann_Plessl_Riebler_Rohde_Schade_Schwarz_et
    al._2025, place={Paderborn}, series={PC2 Tech­nic­al Re­port Series}, title={Otus
    Supercomputer}, volume={1}, DOI={<a href="https://doi.org/10.48550/ARXIV.2512.07401">10.48550/ARXIV.2512.07401</a>},
    publisher={Paderborn Center for Parallel Computing (PC2)}, author={Ehtesabi, Sadaf
    and Hossain, Manoar and Kenter, Tobias and Krawinkel, Andreas and Ostermann, Lukas
    and Plessl, Christian and Riebler, Heinrich and Rohde, Stefan and Schade, Robert
    and Schwarz, Michael and et al.}, year={2025}, collection={PC2 Tech­nic­al Re­port
    Series} }'
  chicago: 'Ehtesabi, Sadaf, Manoar Hossain, Tobias Kenter, Andreas Krawinkel, Lukas
    Ostermann, Christian Plessl, Heinrich Riebler, et al. <i>Otus Supercomputer</i>.
    Vol. 1. PC2 Tech­nic­al Re­port Series. Paderborn: Paderborn Center for Parallel
    Computing (PC2), 2025. <a href="https://doi.org/10.48550/ARXIV.2512.07401">https://doi.org/10.48550/ARXIV.2512.07401</a>.'
  ieee: 'S. Ehtesabi <i>et al.</i>, <i>Otus Supercomputer</i>, vol. 1. Paderborn:
    Paderborn Center for Parallel Computing (PC2), 2025.'
  mla: Ehtesabi, Sadaf, et al. <i>Otus Supercomputer</i>. Paderborn Center for Parallel
    Computing (PC2), 2025, doi:<a href="https://doi.org/10.48550/ARXIV.2512.07401">10.48550/ARXIV.2512.07401</a>.
  short: S. Ehtesabi, M. Hossain, T. Kenter, A. Krawinkel, L. Ostermann, C. Plessl,
    H. Riebler, S. Rohde, R. Schade, M. Schwarz, J. Simon, N. Winnwa, A. Wiens, X.
    Wu, Otus Supercomputer, Paderborn Center for Parallel Computing (PC2), Paderborn,
    2025.
date_created: 2025-12-09T09:11:04Z
date_updated: 2026-03-25T11:50:31Z
ddc:
- '004'
department:
- _id: '27'
- _id: '518'
doi: 10.48550/ARXIV.2512.07401
file:
- access_level: open_access
  content_type: application/pdf
  creator: deffel
  date_created: 2025-12-09T09:19:12Z
  date_updated: 2026-03-25T11:50:30Z
  file_id: '62982'
  file_name: 2512.07401v1.pdf
  file_size: 4535595
  relation: main_file
file_date_updated: 2026-03-25T11:50:30Z
has_accepted_license: '1'
intvolume: '         1'
keyword:
- Otus
- Supercomputer
- FPGA
- PC2
- Paderborn Center for Parallel Computing
- Noctua 2
- HPC
language:
- iso: eng
oa: '1'
page: '33'
place: Paderborn
publication_status: published
publisher: Paderborn Center for Parallel Computing (PC2)
report_number: PC2TR-2025-1
series_title: PC2 Tech­nic­al Re­port Series
status: public
title: Otus Supercomputer
type: report
user_id: '23522'
volume: 1
year: '2025'
...
---
_id: '53663'
abstract:
- lang: eng
  text: 'Noctua 2 is a supercomputer operated at the Paderborn Center for Parallel
    Computing (PC2) at Paderborn University in Germany. Noctua 2 was inaugurated in
    2022 and is an Atos BullSequana XH2000 system. It consists mainly of three node
    types: 1) CPU Compute nodes with AMD EPYC processors in different main memory
    configurations, 2) GPU nodes with NVIDIA A100 GPUs, and 3) FPGA nodes with Xilinx
    Alveo U280 and Intel Stratix 10 FPGA cards. While CPUs and GPUs are known off-the-shelf
    components in HPC systems, the operation of a large number of FPGA cards from
    different vendors and a dedicated FPGA-to-FPGA network are unique characteristics
    of Noctua 2. This paper describes in detail the overall setup of Noctua 2 and
    gives insights into the operation of the cluster from a hardware, software and
    facility perspective.'
article_type: original
author:
- first_name: Carsten
  full_name: Bauer, Carsten
  id: '90082'
  last_name: Bauer
- first_name: Tobias
  full_name: Kenter, Tobias
  id: '3145'
  last_name: Kenter
- first_name: Michael
  full_name: Lass, Michael
  id: '24135'
  last_name: Lass
  orcid: 0000-0002-5708-7632
- first_name: Lukas
  full_name: Mazur, Lukas
  id: '90492'
  last_name: Mazur
  orcid: ' 0000-0001-6304-7082'
- first_name: Marius
  full_name: Meyer, Marius
  id: '40778'
  last_name: Meyer
- first_name: Holger
  full_name: Nitsche, Holger
  id: '15272'
  last_name: Nitsche
- first_name: Heinrich
  full_name: Riebler, Heinrich
  id: '8961'
  last_name: Riebler
- first_name: Robert
  full_name: Schade, Robert
  id: '75963'
  last_name: Schade
  orcid: 0000-0002-6268-5397
- first_name: Michael
  full_name: Schwarz, Michael
  id: '5312'
  last_name: Schwarz
- first_name: Nils
  full_name: Winnwa, Nils
  id: '61189'
  last_name: Winnwa
- first_name: Alex
  full_name: Wiens, Alex
  id: '23522'
  last_name: Wiens
  orcid: 0000-0003-1764-9773
- first_name: Xin
  full_name: Wu, Xin
  id: '77439'
  last_name: Wu
- first_name: Christian
  full_name: Plessl, Christian
  id: '16153'
  last_name: Plessl
  orcid: 0000-0001-5728-9982
- first_name: Jens
  full_name: Simon, Jens
  id: '15273'
  last_name: Simon
citation:
  ama: Bauer C, Kenter T, Lass M, et al. Noctua 2 Supercomputer. <i>Journal of large-scale
    research facilities</i>. 2024;9. doi:<a href="https://doi.org/10.17815/jlsrf-8-187
    ">10.17815/jlsrf-8-187 </a>
  apa: Bauer, C., Kenter, T., Lass, M., Mazur, L., Meyer, M., Nitsche, H., Riebler,
    H., Schade, R., Schwarz, M., Winnwa, N., Wiens, A., Wu, X., Plessl, C., &#38;
    Simon, J. (2024). Noctua 2 Supercomputer. <i>Journal of Large-Scale Research Facilities</i>,
    <i>9</i>. <a href="https://doi.org/10.17815/jlsrf-8-187 ">https://doi.org/10.17815/jlsrf-8-187
    </a>
  bibtex: '@article{Bauer_Kenter_Lass_Mazur_Meyer_Nitsche_Riebler_Schade_Schwarz_Winnwa_et
    al._2024, title={Noctua 2 Supercomputer}, volume={9}, DOI={<a href="https://doi.org/10.17815/jlsrf-8-187
    ">10.17815/jlsrf-8-187 </a>}, journal={Journal of large-scale research facilities},
    author={Bauer, Carsten and Kenter, Tobias and Lass, Michael and Mazur, Lukas and
    Meyer, Marius and Nitsche, Holger and Riebler, Heinrich and Schade, Robert and
    Schwarz, Michael and Winnwa, Nils and et al.}, year={2024} }'
  chicago: Bauer, Carsten, Tobias Kenter, Michael Lass, Lukas Mazur, Marius Meyer,
    Holger Nitsche, Heinrich Riebler, et al. “Noctua 2 Supercomputer.” <i>Journal
    of Large-Scale Research Facilities</i> 9 (2024). <a href="https://doi.org/10.17815/jlsrf-8-187
    ">https://doi.org/10.17815/jlsrf-8-187 </a>.
  ieee: 'C. Bauer <i>et al.</i>, “Noctua 2 Supercomputer,” <i>Journal of large-scale
    research facilities</i>, vol. 9, 2024, doi: <a href="https://doi.org/10.17815/jlsrf-8-187
    ">10.17815/jlsrf-8-187 </a>.'
  mla: Bauer, Carsten, et al. “Noctua 2 Supercomputer.” <i>Journal of Large-Scale
    Research Facilities</i>, vol. 9, 2024, doi:<a href="https://doi.org/10.17815/jlsrf-8-187
    ">10.17815/jlsrf-8-187 </a>.
  short: C. Bauer, T. Kenter, M. Lass, L. Mazur, M. Meyer, H. Nitsche, H. Riebler,
    R. Schade, M. Schwarz, N. Winnwa, A. Wiens, X. Wu, C. Plessl, J. Simon, Journal
    of Large-Scale Research Facilities 9 (2024).
date_created: 2024-04-26T07:39:41Z
date_updated: 2024-04-26T08:44:30Z
ddc:
- '004'
department:
- _id: '27'
- _id: '518'
doi: '10.17815/jlsrf-8-187 '
file:
- access_level: open_access
  content_type: application/pdf
  creator: deffel
  date_created: 2024-04-26T07:30:20Z
  date_updated: 2024-04-26T08:35:17Z
  file_id: '53664'
  file_name: Noctua2_Supercomputer.pdf
  file_size: 3825480
  relation: main_file
file_date_updated: 2024-04-26T08:35:17Z
has_accepted_license: '1'
intvolume: '         9'
keyword:
- Noctua 2
- Supercomputer
- FPGA
- PC2
- Paderborn Center for Parallel Computing
language:
- iso: eng
oa: '1'
project:
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Journal of large-scale research facilities
publication_status: published
status: public
title: Noctua 2 Supercomputer
type: journal_article
user_id: '8961'
volume: 9
year: '2024'
...
---
_id: '46547'
author:
- first_name: Andrea
  full_name: Rogolino, Andrea
  last_name: Rogolino
- first_name: José B. G.
  full_name: Filho, José B. G.
  last_name: Filho
- first_name: Lorena
  full_name: Fritsch, Lorena
  id: '44418'
  last_name: Fritsch
- first_name: José D.
  full_name: Ardisson, José D.
  last_name: Ardisson
- first_name: Marcos A. R.
  full_name: da Silva, Marcos A. R.
  last_name: da Silva
- first_name: Gabriel Ali
  full_name: Atta Diab, Gabriel Ali
  last_name: Atta Diab
- first_name: Ingrid Fernandes
  full_name: Silva, Ingrid Fernandes
  last_name: Silva
- first_name: Carlos André Ferreira
  full_name: Moraes, Carlos André Ferreira
  last_name: Moraes
- first_name: Moacir Rossi
  full_name: Forim, Moacir Rossi
  last_name: Forim
- first_name: Matthias
  full_name: Bauer, Matthias
  id: '47241'
  last_name: Bauer
  orcid: 0000-0002-9294-6076
- first_name: Thomas D.
  full_name: Kühne, Thomas D.
  last_name: Kühne
- first_name: Markus
  full_name: Antonietti, Markus
  last_name: Antonietti
- first_name: Ivo F.
  full_name: Teixeira, Ivo F.
  last_name: Teixeira
citation:
  ama: Rogolino A, Filho JBG, Fritsch L, et al. Direct Synthesis of Acetone by Aerobic
    Propane Oxidation Promoted by Photoactive Iron(III) Chloride under Mild Conditions.
    <i>ACS Catalysis</i>. 2023;13(13):8662-8669. doi:<a href="https://doi.org/10.1021/acscatal.3c02092">10.1021/acscatal.3c02092</a>
  apa: Rogolino, A., Filho, J. B. G., Fritsch, L., Ardisson, J. D., da Silva, M. A.
    R., Atta Diab, G. A., Silva, I. F., Moraes, C. A. F., Forim, M. R., Bauer, M.,
    Kühne, T. D., Antonietti, M., &#38; Teixeira, I. F. (2023). Direct Synthesis of
    Acetone by Aerobic Propane Oxidation Promoted by Photoactive Iron(III) Chloride
    under Mild Conditions. <i>ACS Catalysis</i>, <i>13</i>(13), 8662–8669. <a href="https://doi.org/10.1021/acscatal.3c02092">https://doi.org/10.1021/acscatal.3c02092</a>
  bibtex: '@article{Rogolino_Filho_Fritsch_Ardisson_da Silva_Atta Diab_Silva_Moraes_Forim_Bauer_et
    al._2023, title={Direct Synthesis of Acetone by Aerobic Propane Oxidation Promoted
    by Photoactive Iron(III) Chloride under Mild Conditions}, volume={13}, DOI={<a
    href="https://doi.org/10.1021/acscatal.3c02092">10.1021/acscatal.3c02092</a>},
    number={13}, journal={ACS Catalysis}, publisher={American Chemical Society (ACS)},
    author={Rogolino, Andrea and Filho, José B. G. and Fritsch, Lorena and Ardisson,
    José D. and da Silva, Marcos A. R. and Atta Diab, Gabriel Ali and Silva, Ingrid
    Fernandes and Moraes, Carlos André Ferreira and Forim, Moacir Rossi and Bauer,
    Matthias and et al.}, year={2023}, pages={8662–8669} }'
  chicago: 'Rogolino, Andrea, José B. G. Filho, Lorena Fritsch, José D. Ardisson,
    Marcos A. R. da Silva, Gabriel Ali Atta Diab, Ingrid Fernandes Silva, et al. “Direct
    Synthesis of Acetone by Aerobic Propane Oxidation Promoted by Photoactive Iron(III)
    Chloride under Mild Conditions.” <i>ACS Catalysis</i> 13, no. 13 (2023): 8662–69.
    <a href="https://doi.org/10.1021/acscatal.3c02092">https://doi.org/10.1021/acscatal.3c02092</a>.'
  ieee: 'A. Rogolino <i>et al.</i>, “Direct Synthesis of Acetone by Aerobic Propane
    Oxidation Promoted by Photoactive Iron(III) Chloride under Mild Conditions,” <i>ACS
    Catalysis</i>, vol. 13, no. 13, pp. 8662–8669, 2023, doi: <a href="https://doi.org/10.1021/acscatal.3c02092">10.1021/acscatal.3c02092</a>.'
  mla: Rogolino, Andrea, et al. “Direct Synthesis of Acetone by Aerobic Propane Oxidation
    Promoted by Photoactive Iron(III) Chloride under Mild Conditions.” <i>ACS Catalysis</i>,
    vol. 13, no. 13, American Chemical Society (ACS), 2023, pp. 8662–69, doi:<a href="https://doi.org/10.1021/acscatal.3c02092">10.1021/acscatal.3c02092</a>.
  short: A. Rogolino, J.B.G. Filho, L. Fritsch, J.D. Ardisson, M.A.R. da Silva, G.A.
    Atta Diab, I.F. Silva, C.A.F. Moraes, M.R. Forim, M. Bauer, T.D. Kühne, M. Antonietti,
    I.F. Teixeira, ACS Catalysis 13 (2023) 8662–8669.
date_created: 2023-08-16T14:44:11Z
date_updated: 2024-03-07T09:34:41Z
doi: 10.1021/acscatal.3c02092
intvolume: '        13'
issue: '13'
keyword:
- Catalysis
- General Chemistry
- pc2-ressources
- Computing Resources Provided by the Paderborn Center for Parallel Computing
language:
- iso: eng
page: 8662-8669
publication: ACS Catalysis
publication_identifier:
  issn:
  - 2155-5435
  - 2155-5435
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: Direct Synthesis of Acetone by Aerobic Propane Oxidation Promoted by Photoactive
  Iron(III) Chloride under Mild Conditions
type: journal_article
user_id: '44418'
volume: 13
year: '2023'
...
---
_id: '29946'
author:
- first_name: Christoph Wilhelm Theodor
  full_name: Schall, Christoph Wilhelm Theodor
  id: '44224'
  last_name: Schall
- first_name: Volker
  full_name: Schöppner, Volker
  id: '20530'
  last_name: Schöppner
citation:
  ama: 'Schall CWT, Schöppner V. Design of a test bench for measuring the degradation
    behavior of plastics during processing. In: <i>PPS36</i>. ; 2023.'
  apa: Schall, C. W. T., &#38; Schöppner, V. (2023). Design of a test bench for measuring
    the degradation behavior of plastics during processing. <i>PPS36</i>. PPS36.
  bibtex: '@inproceedings{Schall_Schöppner_2023, title={Design of a test bench for
    measuring the degradation behavior of plastics during processing}, booktitle={PPS36},
    author={Schall, Christoph Wilhelm Theodor and Schöppner, Volker}, year={2023}
    }'
  chicago: Schall, Christoph Wilhelm Theodor, and Volker Schöppner. “Design of a Test
    Bench for Measuring the Degradation Behavior of Plastics during Processing.” In
    <i>PPS36</i>, 2023.
  ieee: C. W. T. Schall and V. Schöppner, “Design of a test bench for measuring the
    degradation behavior of plastics during processing,” presented at the PPS36, 2023.
  mla: Schall, Christoph Wilhelm Theodor, and Volker Schöppner. “Design of a Test
    Bench for Measuring the Degradation Behavior of Plastics during Processing.” <i>PPS36</i>,
    2023.
  short: 'C.W.T. Schall, V. Schöppner, in: PPS36, 2023.'
conference:
  name: PPS36
date_created: 2022-02-22T08:06:35Z
date_updated: 2024-03-25T09:09:18Z
department:
- _id: '9'
- _id: '367'
- _id: '321'
keyword:
- Computing Resources Provided by the Paderborn Center for Parallel Computing
language:
- iso: eng
publication: PPS36
quality_controlled: '1'
status: public
title: Design of a test bench for measuring the degradation behavior of plastics during
  processing
type: conference
user_id: '44116'
year: '2023'
...
---
_id: '29947'
author:
- first_name: Christoph Wilhelm Theodor
  full_name: Schall, Christoph Wilhelm Theodor
  id: '44224'
  last_name: Schall
- first_name: Volker
  full_name: Schöppner, Volker
  id: '20530'
  last_name: Schöppner
citation:
  ama: Schall CWT, Schöppner V. Measurement of material degradation in dependence
    of shear rate, temperature, and residence time. <i>Polymer Engineering and Science</i>.
    2022;62(3):815-823. doi:<a href="https://doi.org/10.1002/pen.25887">10.1002/pen.25887</a>
  apa: Schall, C. W. T., &#38; Schöppner, V. (2022). Measurement of material degradation
    in dependence of shear rate, temperature, and residence time. <i>Polymer Engineering
    and Science</i>, <i>62</i>(3), 815–823. <a href="https://doi.org/10.1002/pen.25887">https://doi.org/10.1002/pen.25887</a>
  bibtex: '@article{Schall_Schöppner_2022, title={Measurement of material degradation
    in dependence of shear rate, temperature, and residence time}, volume={62}, DOI={<a
    href="https://doi.org/10.1002/pen.25887">10.1002/pen.25887</a>}, number={3}, journal={Polymer
    Engineering and Science}, author={Schall, Christoph Wilhelm Theodor and Schöppner,
    Volker}, year={2022}, pages={815–823} }'
  chicago: 'Schall, Christoph Wilhelm Theodor, and Volker Schöppner. “Measurement
    of Material Degradation in Dependence of Shear Rate, Temperature, and Residence
    Time.” <i>Polymer Engineering and Science</i> 62, no. 3 (2022): 815–23. <a href="https://doi.org/10.1002/pen.25887">https://doi.org/10.1002/pen.25887</a>.'
  ieee: 'C. W. T. Schall and V. Schöppner, “Measurement of material degradation in
    dependence of shear rate, temperature, and residence time,” <i>Polymer Engineering
    and Science</i>, vol. 62, no. 3, pp. 815–823, 2022, doi: <a href="https://doi.org/10.1002/pen.25887">10.1002/pen.25887</a>.'
  mla: Schall, Christoph Wilhelm Theodor, and Volker Schöppner. “Measurement of Material
    Degradation in Dependence of Shear Rate, Temperature, and Residence Time.” <i>Polymer
    Engineering and Science</i>, vol. 62, no. 3, 2022, pp. 815–23, doi:<a href="https://doi.org/10.1002/pen.25887">10.1002/pen.25887</a>.
  short: C.W.T. Schall, V. Schöppner, Polymer Engineering and Science 62 (2022) 815–823.
date_created: 2022-02-22T08:09:47Z
date_updated: 2022-04-20T10:13:34Z
department:
- _id: '9'
- _id: '367'
- _id: '321'
doi: 10.1002/pen.25887
intvolume: '        62'
issue: '3'
keyword:
- Computing Resources Provided by the Paderborn Center for Parallel Computing
language:
- iso: eng
page: 815-823
publication: Polymer Engineering and Science
publication_status: published
quality_controlled: '1'
status: public
title: Measurement of material degradation in dependence of shear rate, temperature,
  and residence time
type: journal_article
user_id: '44224'
volume: 62
year: '2022'
...
---
_id: '29948'
author:
- first_name: Florian
  full_name: Brüning, Florian
  id: '72920'
  last_name: Brüning
- first_name: Volker
  full_name: Schöppner, Volker
  id: '20530'
  last_name: Schöppner
citation:
  ama: Brüning F, Schöppner V. Numerical Simulation of Solids Conveying in Grooved
    Feed Sections of Single Screw Extruders. <i>Polymers 14</i>. Published online
    2022. doi:<a href="https://doi.org/10.3390/polym14020256">https://doi.org/10.3390/polym14020256</a>
  apa: Brüning, F., &#38; Schöppner, V. (2022). Numerical Simulation of Solids Conveying
    in Grooved Feed Sections of Single Screw Extruders. <i>Polymers 14</i>. <a href="https://doi.org/10.3390/polym14020256">https://doi.org/10.3390/polym14020256</a>
  bibtex: '@article{Brüning_Schöppner_2022, title={Numerical Simulation of Solids
    Conveying in Grooved Feed Sections of Single Screw Extruders}, DOI={<a href="https://doi.org/10.3390/polym14020256">https://doi.org/10.3390/polym14020256</a>},
    journal={Polymers 14}, author={Brüning, Florian and Schöppner, Volker}, year={2022}
    }'
  chicago: Brüning, Florian, and Volker Schöppner. “Numerical Simulation of Solids
    Conveying in Grooved Feed Sections of Single Screw Extruders.” <i>Polymers 14</i>,
    2022. <a href="https://doi.org/10.3390/polym14020256">https://doi.org/10.3390/polym14020256</a>.
  ieee: 'F. Brüning and V. Schöppner, “Numerical Simulation of Solids Conveying in
    Grooved Feed Sections of Single Screw Extruders,” <i>Polymers 14</i>, 2022, doi:
    <a href="https://doi.org/10.3390/polym14020256">https://doi.org/10.3390/polym14020256</a>.'
  mla: Brüning, Florian, and Volker Schöppner. “Numerical Simulation of Solids Conveying
    in Grooved Feed Sections of Single Screw Extruders.” <i>Polymers 14</i>, 2022,
    doi:<a href="https://doi.org/10.3390/polym14020256">https://doi.org/10.3390/polym14020256</a>.
  short: F. Brüning, V. Schöppner, Polymers 14 (2022).
date_created: 2022-02-22T08:26:47Z
date_updated: 2023-05-02T06:47:24Z
ddc:
- '620'
department:
- _id: '9'
- _id: '367'
- _id: '321'
doi: https://doi.org/10.3390/polym14020256
has_accepted_license: '1'
keyword:
- Computing Resources Provided by the Paderborn Center for Parallel Computing
language:
- iso: eng
publication: Polymers 14
quality_controlled: '1'
status: public
title: Numerical Simulation of Solids Conveying in Grooved Feed Sections of Single
  Screw Extruders
type: journal_article
user_id: '44116'
year: '2022'
...
---
_id: '1590'
abstract:
- lang: eng
  text: "We present the submatrix method, a highly parallelizable method for the approximate
    calculation of inverse p-th roots of large sparse symmetric matrices which are
    required in different scientific applications. Following the idea of Approximate
    Computing, we allow imprecision in the final result in order to utilize the sparsity
    of the input matrix and to allow massively parallel execution. For an n x n matrix,
    the proposed algorithm allows to distribute the calculations over n nodes with
    only little communication overhead. The result matrix exhibits the same sparsity
    pattern as the input matrix, allowing for efficient reuse of allocated data structures.\r\n\r\nWe
    evaluate the algorithm with respect to the error that it introduces into calculated
    results, as well as its performance and scalability. We demonstrate that the error
    is relatively limited for well-conditioned matrices and that results are still
    valuable for error-resilient applications like preconditioning even for ill-conditioned
    matrices. We discuss the execution time and scaling of the algorithm on a theoretical
    level and present a distributed implementation of the algorithm using MPI and
    OpenMP. We demonstrate the scalability of this implementation by running it on
    a high-performance compute cluster comprised of 1024 CPU cores, showing a speedup
    of 665x compared to single-threaded execution."
author:
- first_name: Michael
  full_name: Lass, Michael
  id: '24135'
  last_name: Lass
  orcid: 0000-0002-5708-7632
- first_name: Stephan
  full_name: Mohr, Stephan
  last_name: Mohr
- first_name: Hendrik
  full_name: Wiebeler, Hendrik
  last_name: Wiebeler
- first_name: Thomas
  full_name: Kühne, Thomas
  id: '49079'
  last_name: Kühne
- first_name: Christian
  full_name: Plessl, Christian
  id: '16153'
  last_name: Plessl
  orcid: 0000-0001-5728-9982
citation:
  ama: 'Lass M, Mohr S, Wiebeler H, Kühne T, Plessl C. A Massively Parallel Algorithm
    for the Approximate Calculation of Inverse p-th Roots of Large Sparse Matrices.
    In: <i>Proc. Platform for Advanced Scientific Computing (PASC) Conference</i>.
    ACM; 2018. doi:<a href="https://doi.org/10.1145/3218176.3218231">10.1145/3218176.3218231</a>'
  apa: Lass, M., Mohr, S., Wiebeler, H., Kühne, T., &#38; Plessl, C. (2018). A Massively
    Parallel Algorithm for the Approximate Calculation of Inverse p-th Roots of Large
    Sparse Matrices. <i>Proc. Platform for Advanced Scientific Computing (PASC) Conference</i>.
    Platform for Advanced Scientific Computing Conference (PASC), Basel, Switzerland.
    <a href="https://doi.org/10.1145/3218176.3218231">https://doi.org/10.1145/3218176.3218231</a>
  bibtex: '@inproceedings{Lass_Mohr_Wiebeler_Kühne_Plessl_2018, place={New York, NY,
    USA}, title={A Massively Parallel Algorithm for the Approximate Calculation of
    Inverse p-th Roots of Large Sparse Matrices}, DOI={<a href="https://doi.org/10.1145/3218176.3218231">10.1145/3218176.3218231</a>},
    booktitle={Proc. Platform for Advanced Scientific Computing (PASC) Conference},
    publisher={ACM}, author={Lass, Michael and Mohr, Stephan and Wiebeler, Hendrik
    and Kühne, Thomas and Plessl, Christian}, year={2018} }'
  chicago: 'Lass, Michael, Stephan Mohr, Hendrik Wiebeler, Thomas Kühne, and Christian
    Plessl. “A Massively Parallel Algorithm for the Approximate Calculation of Inverse
    P-Th Roots of Large Sparse Matrices.” In <i>Proc. Platform for Advanced Scientific
    Computing (PASC) Conference</i>. New York, NY, USA: ACM, 2018. <a href="https://doi.org/10.1145/3218176.3218231">https://doi.org/10.1145/3218176.3218231</a>.'
  ieee: 'M. Lass, S. Mohr, H. Wiebeler, T. Kühne, and C. Plessl, “A Massively Parallel
    Algorithm for the Approximate Calculation of Inverse p-th Roots of Large Sparse
    Matrices,” presented at the Platform for Advanced Scientific Computing Conference
    (PASC), Basel, Switzerland, 2018, doi: <a href="https://doi.org/10.1145/3218176.3218231">10.1145/3218176.3218231</a>.'
  mla: Lass, Michael, et al. “A Massively Parallel Algorithm for the Approximate Calculation
    of Inverse P-Th Roots of Large Sparse Matrices.” <i>Proc. Platform for Advanced
    Scientific Computing (PASC) Conference</i>, ACM, 2018, doi:<a href="https://doi.org/10.1145/3218176.3218231">10.1145/3218176.3218231</a>.
  short: 'M. Lass, S. Mohr, H. Wiebeler, T. Kühne, C. Plessl, in: Proc. Platform for
    Advanced Scientific Computing (PASC) Conference, ACM, New York, NY, USA, 2018.'
conference:
  end_date: 2018-07-04
  location: Basel, Switzerland
  name: Platform for Advanced Scientific Computing Conference (PASC)
  start_date: 2018-07-02
date_created: 2018-03-22T10:53:01Z
date_updated: 2023-09-26T11:48:12Z
department:
- _id: '27'
- _id: '518'
- _id: '304'
doi: 10.1145/3218176.3218231
external_id:
  arxiv:
  - '1710.10899'
keyword:
- approximate computing
- linear algebra
- matrix inversion
- matrix p-th roots
- numeric algorithm
- parallel computing
language:
- iso: eng
place: New York, NY, USA
project:
- _id: '32'
  grant_number: PL 595/2-1 / 320898746
  name: Performance and Efficiency in HPC with Custom Computing
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Proc. Platform for Advanced Scientific Computing (PASC) Conference
publication_identifier:
  isbn:
  - 978-1-4503-5891-0/18/07
publisher: ACM
quality_controlled: '1'
status: public
title: A Massively Parallel Algorithm for the Approximate Calculation of Inverse p-th
  Roots of Large Sparse Matrices
type: conference
user_id: '15278'
year: '2018'
...