I’ve been trying to run the feature-classifier extract-reads so I can prepare to train my classifier on some COI reference sequences. The problem I ran into is that it took over a week, and had not yet been completed. For previous versions of Qiime2, I noticed that some people could add an extra parameter ( --p-n-threads) to specify how many threads should be used. However, in trying to do that now (with my current version of Qiime2, qiime2-2019.1) I get an error stating: no such option: --p-n-threads.
Is this no longer a feature in the version I possess? How can I accommodate this?