Support Board
Date/Time: Sun, 11 May 2025 02:48:48 +0000
Post From: Real Time Data Feed quality
| [2015-10-20 02:58:50] |
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Message to Barchart: Today we noticed a significant amount of packet loss on server A. Here is an example: 2015-10-19 10:18:12 | CME:C(310) PerfCnt: Lost Packets = 267 / 567142 (0.047) Feed A Dr/Rx = 658 / 566484 (0.116) Feed B Dr/Rx = 668 / 566474 (0.118) A/B/SS MaxQ: 277 / 278 / 4 MaxRdy: 33052 / 33052 / 2694 SShot Dr/Rx = 6 / 203908 (0.003) 2015-10-19 10:18:12 | CME:C(318) PerfCnt: Lost Packets = 266 / 740686 (0.036) Feed A Dr/Rx = 634 / 740052 (0.086) Feed B Dr/Rx = 617 / 740069 (0.083) A/B/SS MaxQ: 368 / 365 / 5 MaxRdy: 20952 / 20952 / 4742 SShot Dr/Rx = 3 / 203799 (0.001) We did not see the same packet loss on server B. Based on past experience and the recent changes we have made to improve data processing, we do believe the cause is external to the server. I checked the network adapter on server A and the incoming data rate is the same amount compared to server B which did not experience this loss. I am hesitant to keep bothering you about this, but our users do notice even a small amount of loss, and point it out to us. Today I told one user just to cancel the service because I do not want to hear their complaints anymore. We do genuinely believe the cause is external to the server based on all of our experience with this kind of problem. We are nearly 100% certain of that. We did notice a significant amount of loss several months ago and it did appear to be an external problem, but some tests we did were not proving that but then when Barchart changed a network switch that they saw was faulty, it went away completely. One thing would like to point out though is that packet loss in the range of: Lost Packets = 267 / 567142 (0.047%) is not crap and is considered within the range of acceptable. This is one reason we do not want to keep bothering Barchart about this . Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, *change* to the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2015-10-20 03:20:52
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