# feature-classifier fit-classifier-naive-bayes optimisation

**URL:** https://forum.qiime2.org/t/feature-classifier-fit-classifier-naive-bayes-optimisation/10680
**Category:** Technical Support
**Created:** [July 15, 2019, 8:48am UTC](https://forum.qiime2.org/t/feature-classifier-fit-classifier-naive-bayes-optimisation/10680 "2019-07-15T08:48:39Z")
**Posts on this page:** 1
**Showing post:** 9

<div class="post-metadata">

### Author: ![Nicholas\_Bokulich](https://forum.qiime2.org/user_avatar/forum.qiime2.org/nicholas_bokulich/32/19937_2.png) [@Nicholas\_Bokulich](https://forum.qiime2.org/u/Nicholas_Bokulich)
#### Post date: [August 3, 2020, 3:19pm UTC](https://forum.qiime2.org/t/feature-classifier-fit-classifier-naive-bayes-optimisation/10680/9 "2020-08-03T15:19:27Z")

</div>

Welcome to the forum, @jasongallant,  
Thanks for digging up this old topic... some of the info I wrote in there a year ago is impacted by recent updates.

> [@jasongallant](#):
>
> qiime feature-classifier fit-classifier-naive-bayes is essentially silent about progress when working on the MIDORI reference, so its hard to say its “progressing”. Did you observe this?

That is correct — fit-classifier-naive-bayes does not give any "progress update" unfortunately.

> [@jasongallant](#):
>
> -Did you have any hints or scripts to facilitate this?

I'd recommend reducing database size to reduce runtime, if possible:

1. use `extract-reads` to focus on the amplicon region you are using
2. remove any low-quality sequences
3. dereplicate the database (ideally after extracting amplicons) to reduce database size and redundancy. You can use [RESCRIPt](https://forum.qiime2.org/t/processing-filtering-and-evaluating-reference-sequence-data-with-rescript/15494) to dereplicate the sequences together with the taxonomy.

> [@jasongallant](#):
>
> - -Did you ever succeed with BOLD? Any hints or scripts to help with loading this into qiime2?

[RESCRIPt](https://forum.qiime2.org/t/processing-filtering-and-evaluating-reference-sequence-data-with-rescript/15494) also has a "get-ncbi-data" method that you can use to download data from genbank and automatically format it and import it as QIIME 2 artifacts. Since BOLD deposits their public data on genbank (all or most? not sure), it would be possible to use that to grab public BOLD data.

Good luck!

---

_[View the full topic](https://forum.qiime2.org/t/feature-classifier-fit-classifier-naive-bayes-optimisation/10680)._