process {
  withName : '.*PICARD.*' {
    clusterOptions = {"-l h_vmem=${(task.memory + 4.GB).bytes/task.cpus}"}
  }

  withName : '.*SNPEFF.*' {
    clusterOptions = {"-l h_vmem=${(task.memory + 4.GB).bytes/task.cpus}"}
  }
}