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[Anima] Bulk transfer in draft-ietf-anima-grasp-distribution-03

Brian E Carpenter <brian.e.carpenter@gmail.com> Mon, 26 July 2021 22:28 UTC

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To: Anima WG <anima@ietf.org>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Tue, 27 Jul 2021 10:28:31 +1200
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Subject: [Anima] Bulk transfer in draft-ietf-anima-grasp-distribution-03
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Recently I rediscovered something that we included in RFC 8990:

"2.8.3. Message Size

GRASP nodes MUST be able to receive unicast messages of at least GRASP_DEF_MAX_SIZE bytes. GRASP nodes MUST NOT send unicast messages longer than GRASP_DEF_MAX_SIZE bytes unless a longer size is explicitly allowed for the objective concerned. For example, GRASP negotiation itself could be used to agree on a longer message size."

In other words, the method of bulk transfer described in draft-ietf-anima-grasp-distribution at Section 4.3 "Bulk Information Transfer" could be improved by first negotiating a larger message size than the default 2048 bytes. That might improve efficiency for distributing large files. (All it really changes in a GRASP implementation over TLS or TCP is the buffer sized set in two or three socket recv() calls.)

Regards
   Brian

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