[Css-csts] RE: #5 BDP (Input Queue size)

[Martin Götzelmann]

Hi Tim,

It is my understanding that what is stated in section 2.1.3.2.6 of the DP procedure is what we had agreed in the teleconference when John's comments on the procedure were discussed. There is no new specification in the BDP procedures as this specification is inherited and not modified. The only alternative would be to just re-state it and this is what we would generally like to avoid.  Therefore in my understanding the BDP procedure delegates the setting of this parameter to a service using the procedure or to a derived procedure. The service may delegate this to service management.

Concerning  section 2.1.3.2.6, the DP procedure is abstract because it does not specify how queue overflow shall be handled. And yes, your interpretation of what that implies is my understanding as well.

Regards, Martin

From: css-csts-bounces at mailman.ccsds.org [mailto:css-csts-bounces at mailman.ccsds.org] On Behalf Of Ray, Timothy J. (GSFC-5830)
Sent: 16 April 2013 22:46
To: css-csts at mailman.ccsds.org
Subject: [Css-csts] #5 BDP (Input Queue size)

Hi,

In looking through the BDP procedure to see where we specify that the Input Queue size is a configurable parameter, there is no mention of it.   Should there be?  Intended as help in making the decision, here are some related pieces of the puzzle:

The DP procedure, in section 2.1.3.2.6, says:
"The size of the Input Queue for PROCESS-DATA invocations shall be defined by the Service using this procedure or by a derived procedure."

The DP procedure, in section 2.1.3.2.7 (Note 2), says:
"... Because of this missing specification the procedure is abstract and cannot be directly implemented.  To be implementable, derived procedures must provide the missing specification"    (Presumably, the DP procedure cannot be used directly by a Service; there must be an intermediate procedure that is derived from the DP procedure).

Best regards,
Tim
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