struct     type t = [       | `Processors of int 

(** A number of cores on a shared-memory setting. *)

      | `Internet_access 

(** Able to access public HTTP(S) or FTP URLs. *)

      | `Memory of [           | `GB of float 

(** Ask for a specific amount of memory. *)

          | `Small 

(** Tell that the program does not expect HPC-like memory usage (i.e. not more than 2 GB or your usual laptop). *)

          | `Big 

(** Tell that the program may ask for a lot of memory but you don't know how much precisely. *)

        ]       | `Quick_run 

(** Programs that run fast, with little resources. Usually, you can interpret this as "OK to run on the login node of my cluster." *)

      | `Spark of string list 

(** Ask for a Spark (on-YARN) environment with custom parameters (not in use for now, "#WIP"). *)

      | `Custom of string 

(** Pass arbitrary data (useful for temporary extensions/experiements outside of Biokepi). *)

      | `Self_identification of string list         

(** Set of names or tags for a workflow-node program to identify itself to the Machine.t. This is useful for quickly bypassing incorrect requirements set in the library (please also report an issue if you need this). *)

    ] [@@deriving yojson, show]   end