Default runtime attributes for workflow submissions

Jason Cerrato
  • Updated

Runtime attributes can be configured within a WDL's task block, but if no value is specified for any one of the customizable attributes your task will run with the default runtime attribute value. The chart below shows the defaults for each runtime attribute, and how to customize to a value of your choosing.

For more information on runtime attributes, please see Cromwell's Runtime Attribute Descriptions documentation.

NOTE: All workspace buckets are multi-regional US buckets.

Terra supports the following CPU platforms:

  • Intel Cascade Lake (n2)
  • Intel Skylake (n1)
  • Intel Broadwell (n1)
  • Intel Haswell (n1)
  • Intel Ivy Bridge (n1)
  • Intel Sandy Bridge (n1)
  • AMD Rome (n2d)

Runtime attribute

Default How to customize 
Region of Workflow VM us-central1

runtime {
    zones: "us-east1-c

To learn more about available regions, click here

Zone of Workflow VM us-central1-b

runtime {
    zones: "us-central1-c us-central1-f"

To learn more about available zones, click here


runtime {
    cpu: 2

For more details on CPU quotas, see this article

cpuPlatform Whichever variety of CPU Platform n1 machine Google has available at time of request

runtime {
    cpuPlatform: "Intel Cascade Lake"

memory 2G runtime {
    memory: "4G"
disks 10GB SSD

runtime {
    disks: "local-disk 100 HDD"

bootDiskSizeGb 10GB

runtime {
    # Yikes, we have a big OS in this docker image! Allow 50GB to hold it:
    bootDiskSizeGb: 50

maxRetries 0 runtime {
    maxRetries: 3
preemptible 0

runtime {
    preemptible: 1

For more details on saving costs with preemptible VMs, see this article

GPUs not used

runtime {
      gpuType: "nvidia-tesla-k80"
      gpuCount: 2
      nvidiaDriverVersion: "418.87.00"
      zones: ["us-central1-c"]

For more details on using GPUs, see this article


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