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Kraken2 k2 command fails to download taxonomy and library databases

Status: Open.

#1037 In DerrickWood/kraken2;

· Qingheliuliu opened on Aug 14, 2026

Bug: Failing K2 merging of multi-database reports (sometimes)

Status: Open.

#1031 In DerrickWood/kraken2;

· i-sibirica opened on Jun 18, 2026

will you improve k2 with the similar --use-tfp function

Status: Open.

#1024 In DerrickWood/kraken2;

· Xueliang24 opened on Apr 28, 2026

How to use a custom database and make a validation?

Status: Open.

#1022 In DerrickWood/kraken2;

· fabriciomtza opened on Apr 20, 2026

Which method of database construction should I use?

Status: Open.

#1021 In DerrickWood/kraken2;

· qkqk-hub opened on Apr 18, 2026

whats the size of bacteria database is supposed to be in k2 script?

Status: Open.

#1020 In DerrickWood/kraken2;

· ciroariel opened on Apr 9, 2026

problem with plasmid database download

Status: Open.

#1019 In DerrickWood/kraken2;

· minhasbushra opened on Apr 1, 2026

How to calculate the genome size or genome fasta of species in the pre-built database

Status: Open.

#1016 In DerrickWood/kraken2;

· zhangwenda0518 opened on Mar 14, 2026

Building standard db using k2 wrapper doesn't create taxonomy folder

Status: Open.

#1011 In DerrickWood/kraken2;

· almutwerner opened on Feb 23, 2026

Updated advice on converting Kraken output to Biom/Phyloseq

Status: Open.

#1009 In DerrickWood/kraken2;

· fgonzalez3 opened on Jan 30, 2026

Using the k2 classify across multiple databases

Status: Open.

#1008 In DerrickWood/kraken2;

· Alexa2279 opened on Jan 29, 2026

Add genome to prebuild database

Status: Open.

#1007 In DerrickWood/kraken2;

· termithorbor opened on Jan 29, 2026