New feature

Ability to specify the Compute Engine disk type (pd-standard or local-SSD) found in the new Cloud Life Sciences API (https://cloud.google.com/life-sciences/docs/reference/rpc/google.cloud.lifesciences.v2beta#disk).

Usage scenario

Job's that require a high input/output operations per second and lower latency (https://cloud.google.com/compute/docs/disks/local-ssd).

Suggest implementation

The API documentation states it can be set using setType() (https://developers.google.com/resources/api-libraries/documentation/genomics/v1alpha2/java/latest/com/google/api/services/genomics/model/Disk.html#setType-java.lang.String-)

Add disk type during formation of VM in GoogleLifeSciencesHelper.groovy

protected Resources createResources(GoogleLifeSciencesSubmitRequest req) {
        def disk = new Disk()
        disk.setName(req.diskName)
        disk.setSizeGb(req.diskSizeGb)
        disk.setType(req.diskType)

Where req.diskType is specified in GoogleLifeSciencesTaskHandler.groovy

    req.bootDiskSizeGb = executor.config.bootDiskSize?.toGiga() as Integer
    req.diskType = task.config.getDiskType() as String
    return req

getDiskType() can be set within TaskConfig.groovy, where it is set to pd-standard by default.

    String getDiskType() {
        def value = get('diskType')

        if( !value ) return "pd-standard"

        if (value.toString()=="pd-standard" || value.toString()=="local-ssd") {
            return value.toString()
        } else {
            return "pd-standard"
        }
    }

Preliminary tests showed it was successful to generate a Computer Engine instance with SSD attached.