# \#parallelization

**URL:** https://forum.qiime2.org/tag/parallelization/197.md

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## [Parallel config on HPC](https://forum.qiime2.org/t/parallel-config-on-hpc/32892)

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**Author:** [@arwqiime](https://forum.qiime2.org/u/arwqiime)\
**Replies:** 8\
**Last updated:** [April 8, 2025, 6:11pm UTC](https://forum.qiime2.org/t/parallel-config-on-hpc/32892 "2025-04-08T18:11:59Z")

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Hello, I have used q2 plugins (e.g. dada2) on our HPC cluster (using only one node and 32 cpu's per node) previously. Based on the above q2-2024.10 announcement, can I assume that any q2 plugin will also run in HPC cl…

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## [Why isn't alpha-rarefaction using more than 1 core?](https://forum.qiime2.org/t/why-isnt-alpha-rarefaction-using-more-than-1-core/27997)

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**Author:** [@Stephan\_Bitterwolf](https://forum.qiime2.org/u/Stephan_Bitterwolf)\
**Replies:** 2\
**Last updated:** [October 19, 2023, 7:58pm UTC](https://forum.qiime2.org/t/why-isnt-alpha-rarefaction-using-more-than-1-core/27997 "2023-10-19T19:58:59Z")

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Hi all, Love qiime2 but am struggling with a fairly long rarefaction plot calculation (\>1hr). It seems to me that "qiime diversity alpha-rarefaction" should be able to be executed in parallel. Qiime1 seems to have suppo…

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## [Parallelize feature-classifier extract-reads to increase speed?](https://forum.qiime2.org/t/parallelize-feature-classifier-extract-reads-to-increase-speed/16263)

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**Author:** [@Stephan\_Bitterwolf](https://forum.qiime2.org/u/Stephan_Bitterwolf)\
**Replies:** 3\
**Last updated:** [August 27, 2020, 5:13pm UTC](https://forum.qiime2.org/t/parallelize-feature-classifier-extract-reads-to-increase-speed/16263 "2020-08-27T17:13:13Z")

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Thank you for your time, I'd like to preface that I am a novice user of Qiime2 and other bioinformatics techniques; my ideas likely reflect this. However, I genuinely enjoy increasing the speed of computational tasks an…

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## [Errors using dada2 denoise-paired with \>16 threads](https://forum.qiime2.org/t/errors-using-dada2-denoise-paired-with-16-threads/13192)

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**Author:** [@mrichards](https://forum.qiime2.org/u/mrichards)\
**Replies:** 1\
**Last updated:** [January 14, 2020, 5:51pm UTC](https://forum.qiime2.org/t/errors-using-dada2-denoise-paired-with-16-threads/13192 "2020-01-14T17:51:44Z")

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Working through the atacama soils tutorial I've encountered an error when including "--p-n-threads 0". The same error has occured for any thread value over 22 in my testing (machine has 56 threads available). The proble…

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## [Threads vs Nodes](https://forum.qiime2.org/t/threads-vs-nodes/11323)

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**Author:** [@jwdebelius](https://forum.qiime2.org/u/jwdebelius)\
**Replies:** 3\
**Last updated:** [August 30, 2019, 9:46pm UTC](https://forum.qiime2.org/t/threads-vs-nodes/11323 "2019-08-30T21:46:57Z")

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Hi All, I'm trying to understand the difference between the --p-n-jobs and --p-threads (for instance, comparing qiime feature-classifier classify-sklearn and qiime fragment-insertion sepp). When I spin them on a server,…