Merge pull request #230 from ga4gh/132-fractional

fractional resource requirements for CWL 1.1 and 1.2 spec

Closes #139

Author: vsmalladi

Diff for: openapi/task_execution_service.openapi.yaml

@@ -610,10 +610,10 @@ components:
       type: object
       properties:
         cpu_cores:
-          type: integer
-          description: Requested number of CPUs
-          format: int32
-          example: 4
+          type: number
+          description: Requested number of CPUs. MAY be a fractional value to indicate to a scheduling algorithm that one core can be allocated to multiple jobs. For example, a value of 0.25 indicates that up to 4 jobs may run in parallel on 1 core. A value of 1.25 means that up to 3 jobs can run on a 4 core system (4/1.25 ≈ 3). Processes sharing a core MUST have the same level of isolation (typically a container or VM) that they would normally have. Scheduling systems MAY allocate fractional CPU resources by setting quotas or scheduling weights. Scheduling systems that do not support fractional CPUs MAY round up the request to the next whole number.
+          format: double
+          example: 4.25
         preemptible:
           type: boolean
           description: |-
@@ -624,14 +624,19 @@ components:
           example: false
         ram_gb:
           type: number
-          description: Requested RAM required in gigabytes (GB)
-          format: double
-          example: 8
+          description: |- 
+            Requested RAM required in gigabytes (GB) 
+            (maybe fractional, but actual requested memory should 
+            be rounded up to the next whole number of bytes)
+          format: float
+          example: 8.2
         disk_gb:
           type: number
-          description: Requested disk size in gigabytes (GB)
-          format: double
-          example: 40
+          description: |- 
+            Requested disk size in gigabytes (GB) 
+            (maybe fractional, but actual request disk should be rounded up)
+          format: float
+          example: 40.5
         zones:
           type: array
           description: |-