1ba045f4_he_GATK___RETIRED___GATK_Forum__Shared_Memory
[Property] Applicable walker types [Scatter/Gather] All walker types. ReadWalkers can only be split safely by chromosome in general [Shared Memory] 
By locus and by ROD only. ReadWalkers are not supported.
Parallelism with the GATK - RETIRED - GATK-Forum
Shared Memory