Dr.techn. Carlos Andres Pachajoa Mejia, M.Sc. (Hons)
1090 Wien
Courses
Summer term 2026
Summer term 2025
Publications
Algorithm-Based Checkpoint-Recovery for the Conjugate Gradient Method. / Pachajoa, Carlos; Pacher, Christina; Levonyak, Markus et al.
Proceedings of the 49th International Conference on Parallel Processing (ICPP 2020). 2020. p. 1-11 14 (Proceedings of the International Conference on Parallel Processing).
Publications: Contribution to book › Contribution to proceedings › Peer Reviewed
A Generic Strategy for Node-Failure Resilience for Certain Iterative Linear Algebra Methods. / Pachajoa Mejia, Carlos Andres; Ernstbrunner, Robert; Gansterer, Wilfried (Corresponding author).
Proceedings of FTXS 2020: Fault Tolerance for HPC at eXtreme Scale. 2020. p. 41-50.
Publications: Contribution to book › Contribution to proceedings › Peer Reviewed
How to Make the Preconditioned Conjugate Gradient Method Resilient Against Multiple Node Failures. / Pachajoa, Carlos; Levonyak, Markus; Gansterer, Wilfried (Corresponding author) et al.
Proceedings of the 48th International Conference on Parallel Processing - ICPP 2019: Kyoto Japan August 5–8, 2019 . Association for Computing Machinery (ACM), 2019. p. 67:1-67:10 a67 (ACM International Conference Proceeding Series (ICPS), Vol. 2019).
Publications: Contribution to book › Contribution to proceedings › Peer Reviewed
Node-Failure-Resistant Preconditioned Conjugate Gradient Method without Replacement Nodes. / Pachajoa, Carlos; Pacher, Christina; Gansterer, Wilfried (Corresponding author).
Proceedings of FTXS 2019: Fault Tolerance for HPC at eXtreme Scale Workshop: held in conjunction with SC19: the International Conference for High Performance Computing, Networking, Storage and Analysis, Denver, Colorado, November 17-22, 2019. Piscataway, NJ: IEEE, 2019. p. 31-40.
Publications: Contribution to book › Contribution to proceedings › Peer Reviewed
Extending and Evaluating Fault-Tolerant Preconditioned Conjugate Gradient Methods. / Pachajoa, Carlos; Levonyak, Markus; Gansterer, Wilfried (Corresponding author).
PROCEEDINGS OF FTXS 2018: IEEE/ACM 8TH WORKSHOP ON FAULT TOLERANCE FOR HPC AT EXTREME SCALE (FTXS). 2018. p. 49-58.
Publications: Contribution to book › Contribution to proceedings › Peer Reviewed
On the Resilience of Conjugate Gradient and Multigrid Methods to Node Failures. / Pachajoa, Carlos; Gansterer, Wilfried (Corresponding author).
Euro-Par 2017: Parallel Processing Workshops - Euro-Par 2017 International Workshops. ed. / DB Heras; L Bouge; G Mencagli; E Jeannot; R Sakellariou; RM Badia; JG Barbosa; L Ricci; SL Scott; S Lankes; J Weidendorfer. 2018. p. 569-580.
Publications: Contribution to book › Contribution to proceedings › Peer Reviewed
Talks
A Generic Strategy for Node-Failure Resilience for Certain Iterative Linear Algebra Methods
Pachajoa Mejia, C. A. (Speaker), Ernstbrunner, R. (Contributor) & Gansterer, W. (Contributor)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
Algorithm-based checkpoint-recovery for the conjugate gradient method
Pachajoa Mejia, C. A. (Speaker), Pacher, C. (Contributor), Levonyak, M. (Contributor) & Gansterer, W. (Contributor)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
Node-Failure-Resistant Preconditioned Conjugate Gradient Method
Pachajoa Mejia, C. A. (Speaker), Levonyak, M. (Contributor), Pacher, C. (Contributor), Gansterer, W. (Contributor) & Träff, J. L. (Contributor)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
Resilience for Large-Scale Iterative Linear Solvers
Gansterer, W. (Invited speaker), Levonyak, M. (Contributor), Pachajoa Mejia, C. A. (Contributor) & Pacher, C. (Contributor)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
Node-failure-resistant preconditioned conjugate gradient method without replacement nodes
Pachajoa Mejia, C. A. (Speaker), Pacher, C. (Contributor) & Gansterer, W. (Contributor)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
Extending a Preconditioned Conjugate Gradient Method Endowed with Resilience to Multiple Node Failures
Pachajoa Mejia, C. A. (Speaker), Levonyak, M. (Contributor), Gansterer, W. (Contributor) & Träff, J. L. (Contributor)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
How to Make the Preconditioned Conjugate Gradient Method Resilient Against Multiple Node Failures
Pachajoa, C. (Contributor), Levonyak, M. (Speaker), Gansterer, W. (Contributor) & Träff, J. L. (Contributor)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
Comparing Randomized and Deterministic Approaches for Computing Low-rank Approximations
Mayer, V. (Speaker), Pachajoa, C. (Contributor) & Gansterer, W. (Contributor)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
Fast Recovery from Node Failures for the Parallel Preconditioned Conjugate Gradient Method
Levonyak, M. (Speaker), Pachajoa, C. (Contributor) & Gansterer, W. (Contributor)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
Extending and Evaluating Fault-Tolerant Preconditioned Conjugate Gradient Methods
Pachajoa Mejia, C. A. (Speaker)
Activity: Talks and presentations › Talk or oral contribution › Science to Science
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