Re: [sip-overload] draft-ietf-soc-overload-rate-control-04.txt
Janet P Gunn <jgunn6@csc.com> Fri, 28 June 2013 19:34 UTC
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Cc: "sip-overload-bounces@ietf.org" <sip-overload-bounces@ietf.org>, "draft-ietf-soc-overload-rate-control.all@tools.ietf.org" <draft-ietf-soc-overload-rate-control.all@tools.ietf.org>, "sip-overload@ietf.org" <sip-overload@ietf.org>
Subject: Re: [sip-overload] draft-ietf-soc-overload-rate-control-04.txt
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James, It is a little hard to respond in email when your comments are in a separate document, but here goes. section 3.4 ID says: "Note that the target SIP request rate is a max rate that may not be attained by the arrival rate at the client, and the server cannot assume that it will." Your comment : "Not clear what value this paragraph tries to add. Is it saying that the client's arrival rate may be lower than the target SIP request rate? " Yes. Suppose the server want to limit the total rate of arriving SIP messages to 100 / sec, and has 10 clients. Each client has a high variance in its message rate, but together they are well above 100 messages per sec If it sets the rate at 10 messages per second for each of the clients, it will almost certainly end up with an overall average of less than 100 messages per sec, because some clients will be in a "lull" while others are busy. This is good from a throttling perspective, but, assuming messages are correlated with revenue, bad/wasteful from a revenue, or overall productivity perspective. So the server might want to set the rate per client to 10 + delta, where delta is going to be very specific to operating environment. --- In section 3.5.1, bottom of page 8 ID says: "And the larger the difference between TAU1 and TAU2, the closer to the control is to strict priority." You propose changing it to: "And the larger the difference between TAU1 and TAU2, the closer the control is to strict priority queuing." I agree with taking out the redundant "to". But I disagree wit adding "queuing". There is no queuing, priority or otherwise involved. You could say: "And the larger the difference between TAU1 and TAU2, the closer the control is to strict priority treatment." where " strict priority treatment" would refer to the case where non-priority messages are restricted to a total (priority + non-priority) rate of 10 messages per second, but priority messages can continue to be sent as long as the total (priority + non-priority) rate is less than 12 messages per second. At least, I think that is what Eric and Philip are trying to say. Janet This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind CSC to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. From: "Yu, James" <james.yu@neustar.biz> To: "sip-overload-bounces@ietf.org" <sip-overload-bounces@ietf.org>, "draft-ietf-soc-overload-rate-control.all@tools.ietf.org" <draft-ietf-soc-overload-rate-control.all@tools.ietf.org>, "sip-overload@ietf.org" <sip-overload@ietf.org> Date: 06/28/2013 08:10 AM Subject: [sip-overload] draft-ietf-soc-overload-rate-control-04.txt Sent by: sip-overload-bounces@ietf.org Salvatore, Please see the attachment for my comments. I pasted the text to a word document to trace/show the proposed changes and comments. Regards, James [attachment "comments on draft-ietf-soc-overload-rate-control-04.docx" deleted by Janet P Gunn/USA/CSC] _______________________________________________ sip-overload mailing list sip-overload@ietf.org https://www.ietf.org/mailman/listinfo/sip-overload
- [sip-overload] draft-ietf-soc-overload-rate-contr… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Janet P Gunn
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… NOEL, ERIC C (ERIC C)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Janet P Gunn
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… NOEL, ERIC C (ERIC C)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… NOEL, ERIC C (ERIC C)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… NOEL, ERIC C (ERIC C)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… NOEL, ERIC C (ERIC C)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… DRAGE, Keith (Keith)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… DRAGE, Keith (Keith)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… NOEL, ERIC C (ERIC C)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Christer Holmberg
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Christer Holmberg
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… NOEL, ERIC C (ERIC C)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… NOEL, ERIC C (ERIC C)
- Re: [sip-overload] draft-ietf-soc-overload-rate-c… Christer Holmberg
- [sip-overload] draft-ietf-soc-overload-control-13 Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-contro… Vijay K. Gurbani
- Re: [sip-overload] draft-ietf-soc-overload-contro… Janet P Gunn
- Re: [sip-overload] draft-ietf-soc-overload-contro… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-contro… Christer Holmberg
- Re: [sip-overload] draft-ietf-soc-overload-contro… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-contro… Christer Holmberg
- Re: [sip-overload] draft-ietf-soc-overload-contro… Yu, James
- Re: [sip-overload] draft-ietf-soc-overload-contro… Vijay K. Gurbani
- Re: [sip-overload] draft-ietf-soc-overload-contro… Christer Holmberg