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

Xun Xiao <Xun.Xiao@huawei.com> Mon, 26 July 2021 22:39 UTC

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From: Xun Xiao <Xun.Xiao@huawei.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, Anima WG <anima@ietf.org>
Thread-Topic: [Anima] Bulk transfer in draft-ietf-anima-grasp-distribution-03
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Date: Mon, 26 Jul 2021 22:39:35 +0000
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Subject: Re: [Anima] Bulk transfer in draft-ietf-anima-grasp-distribution-03
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Hi Brian,

Thanks for the information, I will consider and note it in the '-04' version.

BR/Xun

-----Original Message-----
From: Anima <anima-bounces@ietf.org> On Behalf Of Brian E Carpenter
Sent: Tuesday, 27 July 2021 00:29
To: Anima WG <anima@ietf.org>
Subject: [Anima] Bulk transfer in draft-ietf-anima-grasp-distribution-03

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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