I had 421 whole genome sequencing data and I want to analyze these data,
so I convert these data from the format of vcf to the format of ped,
but when the stage of tped file convert to ped file, the plink argued "Exhausted system memory",
I thought the reason is the number of markers were no less than 500 million in the sequencing data,
but the RAM (memory) in the server is 128 GB already,
so if I can not expand the memory in the server, how do I handle the whole genome sequencing data using by plink or other trustworthy software?