4.2.0-1 Release Notes
Several packages have been updated to GATK 4.3. Support for read lengths of up to 500 base pairs has been added to haplotypecaller and mutectcaller.
Several performance improvements.
A number of bugs have been fixed.
Added markdup, a tool to locate and tag duplicate reads in a BAM or SAM file, where duplicate reads are defined as originating from a single fragment of DNA.
- Major performance improvements. 
- Supports read lengths of up to 500 base pairs. 
- Updated to GATK 4.3. 
- Supports read lengths of up to 500 base pairs. 
- Adds support for the - --htvc-bam-outputoption.
- --batchis deprecated.
- Updated to GATK 4.3. 
- Supports read lengths of up to 500 base pairs. 
- Adds support for the - --run-partitionoption.
- Updated to GATK 4.3. 
- Clarified error messages. 
Improvements spanning multiple tools
- Added more error checking when writing BAM files using - --gpuwrite.
- Improved performance for BWA alignment, particularly for reads > 250 bases in length. 
- Added GPUDirect Storage (GDS) support for fq2bam (FQ2BAM + BWA-MEM) and associated pipelines. 
- Added a low memory mode for - --gpuwrite(affects sorting).
- deepvariant Could only handle 32 alt alleles per candidate; can now handle up to 64. 
- bamsort Bamsort could fail for certain coordinate sorts. 
For further information see the Parabricks datasheet.