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h2. Runtime constraints

Runtime constraints restrict the container's access to compute resources and the outside world (in addition to its explicitly stated inputs and output).

table(table table-bordered table-condensed).
|_. Key|_. Type|_. Description|_. Notes|
|ram|integer|Number of ram bytes to be used to run this process.|Optional. However, a ContainerRequest that is in "Committed" state must provide this.|
|vcpus|integer|Number of cores to be used to run this process.|Optional. However, a ContainerRequest that is in "Committed" state must provide this.|
|keep_cache_ram|integer|Number of keep cache bytes to be used to run this process.|Optional.|
|API|boolean|When set, ARVADOS_API_HOST and ARVADOS_API_TOKEN will be set, and container will have networking enabled to access the Arvados API server.|Optional.|
|cuda|object|Request CUDA GPU support, see below|Optional.|

h3. CUDA GPU support

table(table table-bordered table-condensed).
|device_count|int|Number of GPUs to request.|Count greater than 0 enables CUDA GPU support.|
|driver_version|string|Minimum CUDA driver version, in "X.Y" format.|Required when device_count > 0|
|hardware_capability|string|Minimum CUDA hardware capability, in "X.Y" format.|Required when device_count > 0|